Patent Publication Number: US-10765209-B2

Title: Cabinet levelling apparatus

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application is a continuation of U.S. patent application Ser. No. 15/028,295, filed Apr. 8, 2016, which is a U.S. National Stage Application of International Application Number PCT/NZ2014/000215, filed Oct. 8, 2014, which claims priority to New Zealand Patent Application No. 616566, filed Oct. 11, 2013, New Zealand Patent Application No. 623065, filed Mar. 27, 2014, New Zealand Patent Application No. 625994, filed Jun. 6, 2014, and New Zealand Patent Application No. 631676, filed Sep. 12, 2014, all of which are hereby incorporated by reference. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to an apparatus for adjusting a height adjustable leg for leveling or adjusting the height of cabinetry such as kitchen, bathroom or laundry cabinetry, or an appliance, or any other object that requires height or leveling adjustment. The present invention also relates to a coupling for forming part of a height adjustable leg, and a tool for adjusting the height of a height adjustable leg via such a coupling. 
     BACKGROUND TO THE INVENTION 
     Height adjustable legs that are used to support cabinets, appliances, furniture or the like are known. They typically comprise a vertically extending threaded shaft received in a corresponding threaded socket fixed to an appliance or cabinet to be height adjusted or leveled. The socket is fixed to the object, so that rotation of the shaft causes a foot of the leg to move axially relative to the socket to set the height of the object supported by the foot. To rotate or turn the threaded shaft in the corresponding threaded socket, the foot may comprise an engagement feature such as a hexagonal or square profile to which a laterally extending tool such as a spanner may engage. Alternatively the foot may be rotated by hand by a user. 
     A tool used for adjusting the height of the leg may engage the foot from a lateral direction. A tool such as a spanner when engaged with the foot extends laterally from the foot to provide a moment arm for turning the foot. A user adjusts the height of the leg by moving the handle of the tool through an arc about or around the foot. Movement of the handle of the tool around the foot can be impeded by adjacent feet, equipment, walls, or cabinetry positioned beside the object being height adjusted, or the object itself, such that the foot may be adjusted only through a series of repeated short arc lengths. Height adjustment of a leg may hence require a user to disengage and re-engage the tool and foot many times to turn the foot through a sufficient amount of angular movement within a limited arc length or angle of rotation. This can be time consuming and alignment may not be easy to achieve each time the tool is to be re-engaged. Alignment vertically, tangentially and radially is necessary in order to re engage. 
     Adjustment of a foot located at the rear of a cabinet or appliance may be difficult, as an extra long tool handle may be required to reach the back feet from the front of the cabinet, such that the adjustment arc for the tool handle to operate in is further limited. Additionally, alignment between the jaw of the tool and the corresponding engagement feature on a rear foot can be difficult due to the difficulty in viewing and/or reaching the rear feet of a cabinet. A user may be required to lie down on a floor surface to view the rear feet in order to properly engage an adjustment tool to the foot for height adjustment. 
     Tools such as standard spanners or screw drivers typically used to adjust height adjustable legs are not designed specifically for the purpose of adjusting a height adjustable leg. The use of non-specific tools or adjusting a leg by hand can present health and safety issues for the user. 
     In an alternative height adjustable leg, the threaded shaft of the leg may be received in a threaded collar or sprocket that is fixed in height relative to the object to be levelled, but free to rotate. Rotation of the threaded shaft of the foot is prevented, for example by a flat section or sections on the threaded shaft received in a corresponding socket fixed to the object to be height adjusted. Rotation of the collar causes the shaft to move axially relative to the collar to set the height of the object supported by the foot. The collar may comprise an engagement feature such as a hexagonal or square profile to which a laterally extending tool such as a spanner may engage. Adjustment of a foot threaded shaft and collar arrangement may have similar problems for height adjustment as described above; limited adjustment arc length and difficulty in aligning the tool and the collar for adjustment. 
     An adjustable foot for an appliance is described in U.S. Pat. No. 7,556,227 (Miele). The appliance is fitted with a rod and pinion. The pinion engages with a sprocket so that rotation of the rod rotates the sprocket to adjust the height of the foot. The rod is supported by the appliance to be held in engagement with the sprocket and extends to the front of the appliance. Adjustment of the rear feet of the appliance can be made using a standard screw driver from the front of the appliance. The appliance is fitted with a pinion and rod for each rear foot so that each rear foot can be adjusted from the front of the appliance. This mechanism may be complex to install within the appliance. Each foot has an associated pinion and driving mechanism which effectively become redundant once the height is set. The front feet are adjusted by a standard screw driver inserted in a vertical slot of the foot. The screw driver is moved through an arc length and may be engaged and disengaged with a front foot a number of times to complete height adjustment of the front of the appliance. 
     A tool for adjusting a foot or leg of an appliance is described in JP1997-206147 (Takigen). The tool includes a ratchet mechanism comprising a ratchet lever or pawl for engaging a ratchet gear on the shaft. With the lever engaged with the gear, the tool is used to adjust the foot by moving the handle of the tool through an arc about or around the foot to rotate the foot, in much the same way in which a standard spanner is used to adjust a foot. The ratchet lever engages the gear in one direction of rotation, and disengages from the gear in the opposite direction of rotation, to allow the tool handle to be moved back and forth in a defined arc length around the foot to adjust the height of the leg in one direction. To change the direction of adjustment (for example from upwards to downwards) it is necessary to switch the lever arm of the ratchet mechanism between two positions. 
     JP2008-213058 (Takigen) describes a similar foot to JP1997-206147 but includes a horizontally pivoting tool head to allow the tool to engage with a foot around obstacles. The pivoting head reduces the arc length in which the handle must be moved to crank the foot for height adjustment. Like the tool of JP1997-206147, to change the direction of adjustment (for example from upwards to downwards) it is necessary to switch the lever arm of the ratchet mechanism between two positions. 
     In this specification where reference has been made to patent specifications, other external documents, or other sources of information, this is generally for the purpose of providing a context for discussing the features of the invention. Unless specifically stated otherwise, reference to such external documents is not to be construed as an admission that such documents, or such sources of information, in any jurisdiction, are prior art, or form part of the common general knowledge in the art. 
     It is an object of the present invention to provide an improved apparatus for adjusting a height adjustable leg, or an improved tool for adjusting a height adjustable leg, or an improved coupling adapted to be attached to or engaged with a height adjustable leg for interfacing with a tool for adjusting the leg, or to at least provide the industry with a useful choice. 
     SUMMARY OF THE INVENTION 
     In one aspect, the present invention consists in an apparatus for adjusting a height adjustable leg for supporting a cabinet, appliance or structure comprising:
         a coupling for forming part of a height adjustable leg, the coupling comprising a driven member or feature, and   a tool comprising a driving member and a torque input for applying torque to the driving member,   the tool and the coupling complementarily adapted to releasably maintain engagement between the driving member and the driven member or feature to allow the driving member to drive the driven member or feature to rotate the coupling about a longitudinal axis of the leg for height adjustment of the leg, and   wherein the driving member and the driven member are gears that releasably mesh together when the tool is engaged with the coupling.       

     In some embodiments the tool and coupling are complementarily adapted so that the tool can engage the coupling laterally from any angular direction relative to the longitudinal axis of the leg. 
     In some embodiments the torque input or the torque input and the driving member each rotates about a lateral axis relative to a longitudinal axis of the leg when driving the driven member or feature. 
     In some embodiments the lateral axis is substantially perpendicular to the longitudinal axis of the leg. 
     In some embodiments the torque input rotates on a lateral axis that is at an angle to the longitudinal axis of the leg, so that with the tool engaged with the coupling the torque input is elevated above a floor surface or other surface on which the leg is to be positioned when supporting the cabinet, appliance or structure. 
     In some embodiments the lateral axis is at an angle of 77.5 to 90 degrees, or 85 to 90 degrees, or 86 to 88 degrees, or 87 to 88 degrees or about 87.5 degrees to the longitudinal axis of the leg. 
     In some embodiments the driving member has a rotational axis able to articulate from a rotational axis of the torque input. 
     In some embodiments the driving member and the torque input are fixed together to both rotate on the lateral axis. 
     In some embodiments the driving member is a pinion. In some embodiments the driven member or feature comprises a rotary rack. 
     In some embodiments the torque input comprises a handle coupled to the driving member, with the driving member engaged to the driven member or feature, rotation of the handle about an axis of the handle independent of a longitudinal axis of the leg rotating the driven member or feature for height adjustment of the leg. 
     In some embodiments the handle has engagement features for engaging with a handle extension. 
     In some embodiments the engagement features are a plurality of longitudinal slots or ribs on the outside surface of the handle. 
     In some embodiments the tool is adapted to remain in a stationary angular position relative to the leg when the driving member drives the driven member or feature. 
     In some embodiments the tool and coupling are adapted to remain continuously engaged when the driving member drives the driven member or feature to rotate about the longitudinal axis of the leg in both directions so that the direction of height adjustment of the height adjustable leg can be reversed without removing the tool from the coupling. 
     In some embodiments, with the tool engaged with the coupling the driving member and the driven member are adapted to remain engaged for continuously adjusting the height of the height adjustable leg in at least one direction. 
     In some embodiments with the tool engaged with the coupling the driving member and the driven member are adapted to remain continuously engaged for adjusting the height of the height adjustable leg in both directions. 
     In some embodiments the tool and the coupling are complementarily adapted so that the tool is secured relative to the coupling in an axial direction and a lateral direction when engaged with the coupling. 
     In some embodiments the tool and the coupling are complementarily adapted so that the tool is secured to the coupling in both axial directions when engaged with the coupling. 
     In some embodiments the coupling is a foot comprising the driven member or feature and a threaded socket or a threaded shaft for engaging a corresponding threaded shaft or socket to form the height adjustable leg. 
     In some embodiments the driven member is integrally formed with the threaded socket or the threaded shaft. 
     In some embodiments the driven member is attached to the threaded socket or the threaded shaft. 
     In some embodiments the driven member is releasably attached to the threaded socket or the threaded shaft. 
     In some embodiments the coupling is adapted to be attached to a threaded socket or a threaded shaft for engaging a corresponding threaded shaft or socket to form the height adjustable leg. 
     In some embodiments the coupling is adapted to be releasably attached to the threaded socket or the threaded shaft. 
     In some embodiments the driven member or feature remains at a fixed height relative to a floor surface or other surface on which the leg is to be positioned when vertically supporting the cabinet, appliance or structure. 
     In some embodiments the tool comprises a guide or positioning feature or features for setting the driving member at a height relative to the floor surface or other surface so that the driving member is positioned axially relative to the coupling for engagement with the driven member, the height of the driven member and height of the driving member both being referenced from the floor surface or other surface. 
     In some embodiments the coupling is adapted to threadably engage a threaded shaft of the leg rotationally fixed to the cabinet, appliance or structure, and the coupling supporting the cabinet, appliance or structure on the shaft, rotation of the coupling on the shaft moving the cabinet, appliance or structure along the shaft for height adjustment. 
     In some embodiments the tool comprises a lateral extension for capturing or bearing against a lateral facing surface of the coupling to releasably retain the tool to the coupling in a lateral direction. 
     In some embodiments the tool comprises two lateral extensions forming a jaw for capturing a diameter of the coupling to releasably retain the tool to the coupling in a lateral direction to releasably maintain engagement between the driving member and the driven member or feature when the driving member drives the driven member for height adjustment of the leg. 
     In some embodiments the jaw extends around a diameter of the coupling by more than 180 degrees. 
     In some embodiments the tool comprises an axial facing bearing surface and the coupling comprises a corresponding axial facing bearing surface, contact between the tool and coupling axial facing bearing surfaces releasably retaining the tool to the coupling in an axial direction to releasably maintain engagement between the driving member and the driven member or feature. 
     In some embodiments the tool comprises a ramp surface to bear against the axial facing surface of the coupling when aligning the tool to the coupling in use to position the tool to the coupling axially. 
     In some embodiments the tool comprises a flange for bearing against a backside of the driven member, the flange providing the axial facing bearing surface of the tool and the backside of the driven member being the axial facing bearing surface of the coupling. 
     In some embodiments the flange contacts the back side of the driven member with the tool engaged with the coupling at least at an angular position at which the driving member engages the driven member. 
     In some embodiments the flange contacts the back side of the driven member with the tool engaged with the coupling at a perimeter portion of the back side of the driven member. 
     In some embodiments the flange captures a diameter of the coupling to releasably retain the tool to the coupling in a lateral direction to releasably maintain engagement between the driving member and the driven member or feature. 
     In some embodiments the flange contacts around the back side of the driven member over an angular distance of 180 degrees or more. 
     In some embodiments with the tool engaged with the coupling the driven member is captured between the driving member and the axial facing bearing surface of the tool. 
     In some embodiments the tool comprises a first axial facing bearing surface and a second opposite axial facing bearing surface and the coupling comprises two corresponding axial facing bearing surfaces to align the tool to the coupling. 
     In some embodiments the axial facing bearing surfaces of the coupling form sides of a slot or channel extending circumferentially around the coupling and the tool comprises a lateral extension that engages the slot or channel, axial sides of the lateral extension providing the axial facing bearing surfaces of the tool. 
     In some embodiments the driven member or feature is a rotary rack forming one side of the slot or channel, teeth of the driven member or feature providing a discontinuous said axial facing bearing surface, and with the tool engaged with the coupling the driving member being received in the slot or channel to engage the driving member or feature. 
     In some embodiments the first and second axial facing bearing surfaces of the tool form sides of a slot or channel and the coupling comprises a flange that engages the slot or channel, axial sides of the flange providing the axial facing bearing surfaces of the coupling to align the tool to the coupling. 
     In some embodiments the first and second axial facing bearing surfaces each comprise a ramp surface at an opening of the slot to provide converging surfaces extending into the slot to assist with aligning the tool to the coupling. 
     In some embodiments the first and second axial facing bearing surfaces of the tool form sides of a slot or channel in the tool and the driven member is a rotary rack, the rotary rack adapted to engage the slot or channel in the tool, teeth of the rotary rack providing a discontinuous said axial facing bearing surface and a back side of the rotary rack providing the other said axial facing bearing surface. 
     In some embodiments the driven member or feature is a rotary rack facing upwards and the driving member is a pinion, and the thread of the shaft or the socket is a right hand thread so that rotation of the pinion in a clockwise direction about a lateral axis rotates the threaded shaft to increase the height of the cabinet, appliance or structure. 
     In some embodiments the torque input comprises an interface for connecting an additional tool for applying torque to the driving member. 
     In some embodiments the apparatus comprises a spacer adapted to be removably attached to a base of the coupling to set a height of the driven member relative to a floor surface or other surface. 
     In another aspect, the present invention consists in a coupling for forming part of a height adjustable leg for supporting a cabinet, appliance or structure, the coupling comprising:
         a driven member or feature, and   the coupling adapted to releasably maintain engagement with a tool comprising a driving member to allow the driving member to drive the driven member or feature to rotate the coupling about a longitudinal axis of the leg for height adjustment of the leg, and   wherein the driven member or feature is a gear adapted to releasably mesh with the driving member of the tool.       

     In some embodiments the coupling is adapted to receive the tool laterally from any angular direction relative to the longitudinal axis of the leg. 
     In some embodiments the driven member or feature comprises a rotary rack. 
     In some embodiments the coupling is adapted to be driven by the tool with the tool held in a stationary angular position relative to the leg when the driving member drives the driven member or feature. 
     In some embodiments the coupling is adapted to be driven by the tool with the tool continuously engaged with the coupling when the driving member drives the driven member or feature to rotate about the longitudinal axis of the leg in both directions so that the direction of height adjustment of the height adjustable leg can be reversed without removing the tool from the coupling. 
     In some embodiments the coupling is adapted to secure the tool relative to the coupling in an axial direction and a lateral direction. 
     In some embodiments the coupling is adapted to secure the tool to the coupling in both axial directions. 
     In some embodiments the coupling is a foot comprising the driven member or feature and a threaded socket or a threaded shaft for engaging a corresponding threaded shaft or socket to form the height adjustable leg. 
     In some embodiments the driven member is integrally formed with the threaded socket or the threaded shaft. 
     In some embodiments the driven member is attached to the threaded socket or the threaded shaft. 
     In some embodiments the driven member is releasably attached to the threaded socket or the threaded shaft. 
     In some embodiments the coupling is adapted to be attached to a threaded socket or a threaded shaft for engaging a corresponding threaded shaft or socket to form the height adjustable leg. 
     In some embodiments the coupling is adapted to be releasably attached to the threaded socket or the threaded shaft. 
     In some embodiments the driven member or feature remains at a fixed height relative to a floor surface or other surface on which the leg is to be positioned when supporting the weight of the cabinet, appliance or structure. 
     In some embodiments the coupling is adapted to threadably engage a threaded shaft of the leg rotationally fixed to the cabinet, appliance or structure, and the coupling supporting the cabinet, appliance or structure on the shaft, rotation of the coupling on the shaft moving the cabinet, appliance or structure along the shaft for height adjustment. 
     In some embodiments the coupling comprises an axial facing bearing surface to interface with a corresponding axial facing bearing surface on the tool so that contact between the tool and coupling axial facing bearing surfaces releasably retains the tool to the coupling in an axial direction to releasably maintain engagement between the driving member and the driven member or feature. 
     In some embodiments the driven member is a rotary rack and a back side of the rotary rack comprises the axial facing bearing surface of the coupling. 
     In some embodiments the axial facing bearing surface is at an angle of 0 to 12.5 degrees, where 0 degrees is perpendicular to the longitudinal axis of the coupling. 
     In some embodiments the axial facing bearing surface is substantially perpendicular to the longitudinal axis of the coupling. 
     In some embodiments the axial facing bearing surface is at a perimeter portion of the back side of the rack. 
     In some embodiments an inner portion of the back side of the rack is inclined. 
     In some embodiments the driven member is a rotary rack and a back side of the rotary rack comprises an inclined surface so that the thickness of the rotary rack at the perimeter of the rotary rack is less than the thickness of the rotary rack at an inner diameter of the rotary rack. 
     In some embodiments the coupling comprises a first axial facing bearing surface and a second opposite axial facing bearing surface to interface with two corresponding axial facing bearing surfaces of the tool so that contact between the tool and coupling axial facing bearing surfaces releasably retains the tool to the coupling in an axial direction to releasably maintain engagement between the driving member and the driven member or feature. 
     In some embodiments the axial facing bearing surfaces of the coupling form sides of a slot or channel extending circumferentially around the coupling for receiving a lateral extension of the tool. 
     In some embodiments the driven member or feature is a rotary rack forming one side of the slot or channel, teeth of the driven member or feature providing a discontinuous said axial facing bearing surface. 
     In some embodiments the coupling comprises a lateral flange for engaging a slot or channel in the tool, axial sides of the flange providing the axial facing bearing surfaces of the coupling. 
     In some embodiments the driving member is a rotary rack, the rotary rack adapted to engage a slot or channel in the tool, teeth of the rotary rack providing a discontinuous said axial facing bearing surface and a back side of the driven member providing the other said second axial facing bearing surface. 
     In some embodiments the rotary rack comprises 40 to 200 teeth. 
     In some embodiments each tooth comprises a flat portion at a tip of the tooth, the flat portions of the teeth combining to form the discontinuous axial facing bearing surface. 
     In some embodiments the driven member or feature is a rotary rack facing upwards and the thread of the shaft or the socket is a right hand thread. 
     In some embodiments the coupling includes a spacer adapted to be removably attached to a base of the coupling to set a height of the driven member relative to a floor surface or other surface. 
     In another aspect, the present invention consists in a coupling for forming part of a height adjustable leg for supporting a cabinet, appliance or structure, the coupling comprising:
         a rotationally drivable member to rotate about an axis and presenting radial gear teeth that face in one direction of said axis and presenting a bearing surface that faces in the opposite direction of said axis.       

     In some embodiments the drivable member is engageable by a tool that includes a gear to engage with said radial gear teeth of said drivable member and a bearing member to locate against said bearing surface to hold said gear and gear teeth in engagement in the axial direction. 
     In some embodiments the bearing surface is at an angle of 0 to 12.5 degrees, where 0 degrees is perpendicular to the axis. 
     In some embodiments the coupling includes a shaft or socket coaxial said axis and coupled or formed with the drivable member. 
     In some embodiments the shaft or socket is a threaded shaft or socket. 
     In some embodiments the diameter of the shaft or socket is greater than 15 mm. 
     In another aspect, the present invention consists in a height adjustable leg for supporting an cabinet, appliance or structure comprising a coupling as described by any one or more of the above statements relating to a said coupling. 
     In another aspect, the present invention consists in a cabinet, appliance or structure comprising a leg or more than one leg, the leg comprising a coupling as described by any one or more of the above statements relating to a said coupling. 
     In another aspect, the present invention consists in a tool for driving a height adjustable leg supporting a cabinet, appliance or structure comprising:
         a driving member and a torque input for applying torque to the driving member, the tool adapted to releasably maintain engagement with a coupling of the height adjustable leg comprising a driven member or feature to allow the driving member to drive the driven member or feature to adjust the height of the cabinet, appliance or structure, and   wherein the driving member is a gear adapted to releasably mesh with the driven member of the coupling.       

     In some embodiments the tool is adapted to engage the coupling laterally from any angular direction relative to the longitudinal axis of the leg. 
     In some embodiments the torque input or the torque input and the driving member each rotates about a lateral axis relative to a rotational axis of the leg when driving the driven member or feature. 
     In some embodiments the lateral axis is substantially perpendicular to the longitudinal axis of the leg. 
     In some embodiments the torque input rotates on a lateral axis that is at an angle to the longitudinal axis of the leg, so that with the tool engaged with the coupling the torque input is elevated above a floor surface or other surface on which the leg is to be positioned when supporting the cabinet, appliance or structure. 
     In some embodiments the lateral axis is at an angle of 77.5 to 90 degrees, or 85 to 90 degrees, or 86 to 88 degrees, or 87 to 88 degrees or about 87.5 degrees to the longitudinal axis of the leg. 
     In some embodiments the driving member has a rotational axis able to articulate from a rotational axis of the torque input. 
     In some embodiments the driving member and the torque input are fixed together to rotate only on the lateral axis. 
     In some embodiments the driving member is a pinion. 
     In some embodiments the torque input comprises a handle coupled to the driving member for rotating the driving member, in use the handle comprising a rotational axis independent of a rotational axis of the coupling. 
     In some embodiments the handle has engagement features for engaging with a handle extension. 
     In some embodiments the engagement features are a plurality of longitudinal slots or ribs on the outside surface of the handle. 
     In some embodiments the tool is adapted to remain in a stationary angular position relative to the leg when the driving member drives the driven member or feature. 
     In some embodiments the tool is adapted to remain continuously engaged with the coupling when the driving member drives the driven member or feature to rotate about the longitudinal axis of the leg in both directions so that the direction of height adjustment of the height adjustable leg can be reversed without removing the tool from the coupling. 
     In some embodiments with the tool engaged with the coupling the driving member is adapted to remain continuously engaged with the driven member for adjusting the height of the height adjustable leg in both directions. 
     In some embodiments the tool is adapted to be secured relative to the coupling in an axial direction and a lateral direction when engaged with the coupling. 
     In some embodiments the tool is adapted to be secured to the coupling in both axial directions. 
     In some embodiments the tool comprises a guide or positioning feature or features for setting the driving member at a height relative to a floor surface or other surface supporting the leg. 
     In some embodiments the tool comprises a lateral extension for capturing or bearing against a lateral facing surface of the coupling to releasably retain the tool to the coupling in a lateral direction. 
     In some embodiments the tool comprises two lateral extensions forming a jaw for capturing a diameter of the coupling to releasably retain the tool to the coupling in a lateral direction to releasably maintain engagement between the driving member and the driven member or feature. 
     In some embodiments the jaw extends around a diameter of the coupling by more than 180 degrees. 
     In some embodiments the tool comprises an axial facing bearing surface to interface with a corresponding axial facing bearing surface on the coupling so that contact between the tool and coupling axial facing bearing surfaces releasably retains the tool to the coupling in an axial direction to releasably maintain engagement between the driving member and the driven member or feature. 
     In some embodiments the tool comprises a flange for bearing against a backside of the driven member, the flange providing the axial facing bearing surface of the tool and the backside of the driven member being the axial facing bearing surface of the coupling. 
     In some embodiments the flange contacts the back side of the driven member with the tool engaged with the coupling at least at an angular position at which the driving member engages the driven member. 
     In some embodiments the flange contacts the back side of the driven member with the tool engaged with the coupling at a perimeter portion of the back side of the driven member. 
     In some embodiments the flange captures a diameter of the coupling to releasably retain the tool to the coupling in a lateral direction to releasably maintain engagement between the driving member and the driven member or feature. 
     In some embodiments the flange contacts around the back side of the driven member over an angular distance of 180 degrees or more. 
     In some embodiments the axial facing bearing surface is at an angle of 0 to 12.5 degrees, where 0 degrees is perpendicular to the coupling when engaged with the tool. 
     In some embodiments the axial facing bearing surface is substantially perpendicular to a longitudinal axis of the coupling when engaged with the coupling. 
     In some embodiments the axial facing bearing surface is adapted to contact the coupling at a perimeter portion of the back side of the driven member. 
     In some embodiments the driving member is a pinion and an axial gap between the flange and the pinion converges from a forward end of the pinion towards a rearward end of the driving member. 
     In some embodiments the flange comprises a ramped surface for receiving the driven member between the pinion and the flange to align the driven member to the driving member. 
     In some embodiments the tool comprises a first axial facing bearing surface and a second opposite axial facing bearing surface to interface with two corresponding axial facing bearing surfaces of the coupling to align the tool to the coupling. 
     In some embodiments the tool comprises a lateral extension adapted to engage a slot or channel in the coupling and axial sides of the lateral extension providing the axial facing bearing surfaces of the tool. 
     In some embodiments the first and second axial facing bearing surfaces of the tool form sides of a slot or channel in the tool for receiving a flange of the coupling or the driven member of the coupling, sides of the slot or channel adapted to bear against axial sides of the flange or the driven member to align the tool to the coupling. 
     In some embodiments the first and second axial facing bearing surfaces each comprise a ramp surface at an opening of the slot to provide converging surfaces extending into the slot to assist with aligning the tool to the coupling. 
     In some embodiments the torque input comprises an interface for connecting an additional tool for applying torque to the driving member. 
     In another aspect, the present invention consists in an adjustable prop for supporting a cabinet, appliance or structure carrying a threaded component, and a tool for adjusting the prop relative to the cabinet, appliance or structure,
         the prop comprising:
           a threaded shaft to threadably engage to the threaded component, relative rotation between the shaft and the threaded component moving the shaft axially relative to the threaded component, and   a driven member or feature on the threaded shaft or the threaded component,   
           the tool comprising a driving member and a torque input for applying torque to the driving member,   the tool and the prop complementarily adapted to releasably maintain engagement between the driving member and the driven member or feature to allow the driving member to drive the driven member or feature to rotate the shaft or the threaded component to move the shaft axially relative to the threaded component, and   wherein the driving member and the driven member are gears that releasably mesh together when the tool is engaged with the prop.       

     In another aspect, the present invention consists in an adjustable prop for supporting a cabinet, appliance or structure carrying a threaded component comprising:
         a threaded shaft to threadably engage to the threaded component, relative rotation between the shaft and the threaded component moving the shaft axially relative to the threaded component,   a driven member or feature on the threaded shaft or the threaded component, and   the prop adapted to releasably maintain engagement with a tool comprising a driving member to allow the driving member to drive the driven member or feature to rotate the shaft or the threaded component to move the shaft axially relative to the threaded component, and   wherein the driven member or feature is a gear adapted to releasably mesh with the driving member of the tool.       

     In another aspect, the present invention consists in a tool for driving an adjustable prop for supporting a cabinet, appliance or structure carrying a threaded component comprising:
         a driving member and a torque input for applying torque to the driving member, the tool adapted to releasably maintain engagement with the adjustable prop comprising a driven member or feature to allow the driving member to drive the driven member or feature to adjust the position of the prop relative to the threaded component, and   wherein the driving member is a gear adapted to releasably mesh with the driven member or feature of the prop.       

     In another aspect, the present invention consists in a cabinet, appliance or structure to be supported by a floor, said cabinet, appliance or structure comprising:
         a base carrying a plurality of threaded components with each a plurality of height adjustable feet are associated, each one of said feet comprising:   a threaded shaft threadably engaged to a corresponding threaded component, relative rotation between the shaft and the threaded component moving the shaft axially relative to the threaded component for height adjustment,   a driven member or feature on the threaded shaft or the threaded component,   where each of the feet is adapted to releasably maintain engagement with a tool comprising a driving member to allow the driving member to drive the driven member or feature to rotate the shaft or the threaded component to move the shaft axially relative to the threaded component, and   wherein the driven member or feature is a gear adapted to releasably mesh with the driving member of the tool.       

     In another aspect, the present invention consists in a tool for driving each of said height adjustable feet of the cabinet, appliance or structure of the previous statement, the tool able to reach each of said feet and become associated therewith, the tool comprising a driving member and a torque input for applying torque to the driving member, the tool adapted to releasably maintain engagement with said height adjustable foot to allow the driving member to drive the driven member or feature to adjust the height of the cabinet, appliance or structure, wherein the driving member is a gear adapted to releasably mesh with the driven member of a said foot. 
     In some embodiments the tool is adapted to displace relative the floor to reach each of said feet to engage with said driven member and drive said driven member without needing to rotate about a longitudinal axis of the foot. 
     In some embodiments the tool is adapted to slide along the floor to reach and be aligned with each of said feet to engage with said driven member and drive said driven member without needing to slide relative the floor or rotate about a longitudinal axis of the foot. 
     The term “comprising” as used in this specification and claims means “consisting at least in part of”. When interpreting each statement in this specification that includes the term “comprising”, features other than that or those prefaced by the term may also be present. Related terms such as “comprise” and “comprises” are to be interpreted in the same manner. 
     As used herein the term “and/or” means “and” or “or”, or both. 
     As used herein “(s)” following a noun means the plural and/or singular forms of the noun. 
     As used herein the term “floor” or the phrase “floor surface” should be interpreted to mean any surface which supports the foot being described or claimed. 
     This invention may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, and any or all combinations of any two or more said parts, elements or features, and where specific integers are mentioned herein which have known equivalents in the art to which this invention relates, such known equivalents are deemed to be incorporated herein as if individually set forth. 
     The invention consists in the foregoing and also envisages constructions of which the following gives examples only. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Preferred embodiments of the invention will be described by way of example only and with reference to the following drawings. 
         FIG. 1A  is a perspective view of a foot and a tool for adjusting the foot to adjust the height of an object supported by the foot. In use the foot is received in a threaded socket attached to the object. 
         FIG. 1B  is a close up view of part of the tool and the foot of  FIG. 1A . 
         FIG. 2  is a side view of the foot illustrated in  FIG. 1A . 
         FIG. 3  is a perspective view of the foot and the corresponding tool of  FIG. 1A  with the tool engaged with the foot. 
         FIG. 4  is a side view of the foot and tool of  FIG. 1A  with the tool engaged with the foot. 
         FIG. 5  is a side view of the foot and tool of  FIG. 1A  with the tool engaged with the foot, and with a handle of the tool articulated to a raised position. 
         FIG. 6  is an end view of the foot and tool of  FIG. 1A  with the tool engaged with the foot. 
         FIG. 7  is an end view of the tool of  FIG. 1A  on a driving member end of the tool. 
         FIG. 8  is an end view of the tool of  FIG. 1A  on a handle end of the tool with the tool engaged with the foot. 
         FIG. 9  is a top view of the tool of  FIG. 1A . 
         FIG. 10  is a cross sectional view of the tool of  FIG. 1A  on a longitudinal centre line (A-A in  FIG. 9 ) of the tool. 
         FIG. 11  is a perspective view of the foot of  FIG. 1A  and an alternative tool for adjusting the foot to adjust the height of an object supported by the foot. 
         FIG. 12  is a perspective view of an alternative foot and the tool of  FIG. 1A  for adjusting the foot to adjust the height of an object supported by the foot. 
         FIG. 13A  is a perspective view of a foot and a tool according to another embodiment of the present invention. 
         FIG. 13B  is a side view of the foot illustrated in  FIG. 13A . 
         FIG. 14  is a perspective view of the foot and the tool of  FIG. 13A  with the tool engaged with the foot. 
         FIG. 15  is a side view of the foot and the tool of  FIG. 13A  with the tool engaged with the foot. 
         FIG. 16  is a top view of the foot and the tool of  FIG. 13A  with the tool engaged with the foot. 
         FIG. 17  is a bottom view of the foot and the tool of  FIG. 13A  with the tool engaged with the foot. 
         FIG. 18  is a bottom view of the tool of  FIG. 13A . 
         FIG. 19  is a cross sectional view of the tool of  FIG. 13A  on a longitudinal centre line of the tool. 
         FIG. 20  is an end view of the tool of  FIG. 13A  on a driving member end of the tool. 
         FIG. 21  is an end view of the foot and tool of  FIG. 13A  with the tool engaged with the foot. 
         FIG. 22  is a side view of the foot illustrated in  FIG. 13B  and with a spacer shown spaced from the base of the foot. 
         FIG. 23  is an end view of the foot and tool of  FIG. 13A  with the tool engaged with the foot and with the spacer shown in  FIG. 22  attached to the base of the foot. 
         FIG. 24  is a side view of the foot and the tool of  FIG. 13A  with the tool engaged with the foot and with the spacer shown in  FIG. 22  attached to the base of the foot. 
         FIG. 25A  is a part sectional plan view of a tool according to another embodiment of the present invention shown engaged with a height adjustable leg. 
         FIG. 25B  is a part side view of the tool of  FIG. 25A  shown engaged with a height adjustable leg. 
         FIG. 25C  is a part sectional side view of the tool of  FIG. 25A  shown engaged with a height adjustable leg. 
         FIG. 25D  is a part cross sectional view of a handle extension fitted to a handle of the tool of  FIG. 25A . 
         FIG. 25E  is a perspective view of the tool from  FIG. 25A . 
         FIG. 26A  is a cross sectional view of an alternative foot and portion of a tool, with the tool engaged with the foot, the cross section being on a longitudinal centre line of the tool and the foot. 
         FIG. 26B  is a cross sectional view of the foot and tool of  FIG. 26A , the cross section being on a longitudinal centre line of the foot and lateral to the tool. 
         FIG. 26C  shows the cross section of the tool of  FIG. 26A  with the foot removed. 
         FIG. 26D  is a side view of the foot of  FIG. 26A . 
         FIG. 26E  is a bottom view of the foot of  FIG. 26A   
         FIGS. 27A and 27B  illustrate a plan and side view of a cabinet installation in which access to rear legs of the cabinet is limited by an obstruction beneath the cabinet. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     Various embodiments of a foot and/or a tool for adjusting the foot are described with reference to the Figures. The same reference numerals are used throughout to designate the same or similar components in various embodiments described. 
       FIGS. 1A to 10  illustrate a height adjustable foot or prop and a tool for adjusting the foot or prop according to some embodiments of the present invention. The foot or prop is referred to herein as a foot for height adjustment of a cabinet, appliance or structure or other object. A person skilled in the art will understand the foot or prop could also be used for sideways support of an object, for example supporting a cabinet from a vertical wall. In some embodiments the foot  10  comprises a threaded shaft  11 . In use the threaded shaft is received in a threaded socket  5  or component (for example a nut) fixed to a cabinet, appliance or structure (herein an object) or other object to be height adjusted or leveled. The foot and threaded socket together for a height adjustable leg. Rotation of the shaft  11  in the socket  5  causes the foot to move axially relative to the socket to set the height of the object supported by the leg. Typically an object will be supported on two, three, four or more height adjustable legs so that the height and level of the object may be adjusted. A base  12  of the foot contacts a floor surface or other surface supporting the object. In some embodiments the shaft  11  may be rotationally supported on the base  12 , so that the base  12  rests on a floor surface or other surface supporting the object without rotation when turning the shaft for height adjustment. A low friction interface may be provided between the shaft  11  and the base  12  to allow the shaft to turn relative to the floor or supporting surface while the base remains stationary on the floor. In some embodiments the shaft may be fixed to the base  12  so that the base and threaded shaft turn together when adjusting the height of the supported object. The threaded shaft  11  may comprise a thread along its full length or part way along its length. For example, in some embodiments the threaded shaft may have a threaded portion at an end of the shaft to engage a corresponding threaded socket part. In some embodiments the threaded shaft may comprise a hollow threaded portion. That is the threaded shaft may have an internal thread to mate with a corresponding threaded shaft or male thread. In other words, in some embodiments the foot  10  may comprise a threaded socket having an internal thread to mate with a corresponding threaded shaft attached to the object being supported. An example of a foot comprising a threaded socket is illustrated in  FIG. 25C . 
     A tool  50  is used for turning or rotating the foot to adjust the height of the object. The tool comprises a driving member  51 . The foot comprises a corresponding driven member or feature  13 . In the embodiment illustrated in  FIGS. 1A to 10 , the driving member is a pinion  51  and the driven member or feature comprises a rotary rack  13  on (fixed to) the threaded shaft. 
     In some embodiments the tool comprises a handle  52  coupled to the driving member  51  via a connecting rod  65  (shown in  FIG. 10 ). In the illustrated embodiment the rod coupled between the handle  52  and the driving member  51  is shrouded by an arm  53  extending between the driving member  51  and the handle  52 . Rotation of the handle  52  about a longitudinal axis of the handle causes rotation of the driving member  51 . With the tool engaged with the foot the driving member  51  is engaged or meshed with the driven member  13  so that rotation of the handle turns the threaded shaft  11  for height adjustment. In the embodiment of  FIGS. 1A to 10  the driving member rotates about a lateral axis relative to a longitudinal axis of the threaded shaft when driving the driven member or feature  13 . The driving member drives the driven member to rotate the driven member about the longitudinal axis of the leg. In some embodiments the lateral axis is substantially perpendicular to the longitudinal axis of the threaded shaft. In some embodiments the lateral axis is arranged at an angle to the longitudinal axis of the threaded shaft. 
     In some embodiments the tool comprises a joint  54  between the handle  52  and the driving member  51  so that driving member  51  has a rotational axis able to articulate from a rotational axis of the handle  52 . For example joint  54  is a universal joint. In some embodiments the articulation allows a user to move the handle up and down by rotation of the handle and arm about a substantially horizontal axis  55 . This movement of the handle may ergonomically assist with use of the tool for height adjustment of the foot. Articulation between the handle and the driven member with the handle rotated about axis  55  to a raised position is illustrated in  FIG. 5 . 
     In some embodiments, the handle may be fitted with an interface for connecting an additional tool for applying torque to driving member via the handle. For example, the illustrated embodiment as shown in  FIG. 8  comprises a hexagonal socket  61 . A user may fit a tool such as a wrench or a power drill to the handle via the hexagonal socket to provide torque to the handle for turning the foot via the driving member. Whether a user turns the handle by hand or by a tool fitted to the handle may depend on the weight of the object being supported by the foot. The handle  52  and/or the interface  61  may be described as a torque input for applying torque to the driving member. The torque input allows a user to apply torque to the driving member, for example by hand using handle  52  wherein the handle is the torque input. In some embodiments the handle  52  is not fitted with an interface for attaching an additional tool, wherein the handle is the torque input. In some embodiments, the tool  50  does not have a handle, but comprises a torque input for attaching an additional tool to tool  50 , for example interface  61 . In some embodiments the handle of the tool does not rotate to turn the driving member. A user may hold the handle and rotate the driving member using an additional tool via the torque input, for example socket  61 . 
     Other torque input examples are a slot for receiving a screw driver and a square or hexagonal male interface for being received in a female square or hexagonal socket of a drive tool. 
     In some embodiments the tool may be a power tool. That is, the tool may comprise an electric motor as the torque input for driving the driving member. A motor may be located in a (stationary) handle of the tool, or between the handle and the driving member. 
     The tool and the foot are complementarily adapted to releasably maintain engagement between the driving member  51  and the driven member or feature  13  to allow the driving member to drive the driven member or feature to rotate the shaft  11 . The tool and the foot comprise complementary features to releasably maintain engagement between the driving member and the driven member when the tool is engaged with the foot. The tool and the foot comprise complementary features to releasably maintain engagement between the tool and the foot to releasably maintain engagement between the driving member and the driven member. In some embodiments, the tool and the foot comprise complementary features to assist with alignment of the tool with the foot when engaging the tool to the foot. The foot  10  may be described as a coupling or coupling part of the height adjustable leg for coupling to the tool so that the tool is releasably engaged to the height adjustable leg for height adjustment. 
     For lateral alignment of the tool and the foot, in some embodiments the tool comprises a lateral extension  56  for capturing or bearing against a lateral facing surface of the foot, for example surface  14 . In some embodiments the tool comprises a lateral extension  56  for capturing or bearing against a lateral facing surface of the foot to releasably retain the tool to the foot in a lateral direction. For example, in the embodiment illustrated in  FIGS. 1A to 10 , the tool comprises two spaced apart lateral extensions  56 . The lateral extensions  56  provide a jaw  63  for capturing the foot laterally to align the tool to the foot. In some embodiments, the jaw  63  captures the foot laterally to releasably retain the tool to the foot in a lateral direction to releasably maintain engagement between the driving member  51  and the driven member  13 . A diameter of the foot is complementarily sized to bear against radially facing surfaces of the tool to laterally align the position of the tool correctly to the foot. For example, a diameter  14  of the foot may be complementarily sized to bear against radially inward facing surfaces  57  of the jaw  63  to laterally set the position of the tool correctly to the foot. When the tool engages with the foot the diameter  14  is received within the jaw. In the illustrated embodiment of  FIGS. 1A to 10 , radial facing surfaces  69  may bear against outside diameter of circular flange  16 . In the illustrated embodiment of  FIGS. 1A to 10 , radial facing surfaces  70  may bear against an outside diameter of the driven member or feature  13 . In some embodiments the tool may comprise lateral extensions  56  for engaging an outer diameter of the threaded shaft. For example, the tool lateral extensions  56  may engage the major diameter of the thread of the threaded shaft, the threaded shaft rotationally sliding on the radial facing surfaces  57  of the lateral extensions when the tool rotationally drives the foot. In some embodiments the foot may comprise a threaded socket and the lateral extensions may engage an outer diameter of the threaded socket. 
     In some embodiments the tool may comprise one lateral extension  56 , as illustrated in  FIG. 11 . The lateral extension comprises a radially inward facing surface  57  that bears against the corresponding diameter  14  of the foot  10 . In some embodiments the lateral extension  56  is provided to a side of the foot so that the radial inward facing surface  57  of the tool bears against the corresponding diameter of the foot when the tool is used to drive the threaded shaft of the foot in a direction to increase the height of the object being supported. This arrangement ensures the tool remains engaged to the foot laterally when driving the foot against the weight of the object being supported. 
     With reference to  FIG. 9 , in some embodiments the entrance  64  to the jaw  63  is narrower than the diameter  14  of the foot to which the jaw engages. In other words, in some embodiments the jaw extends around the diameter  14  of the foot by more than 180 degrees to capture the foot in the jaw when the tool is engaged with the foot. To engage the tool with the foot, the jaw elastically deflects slightly (for example lateral extensions  56  bend outwards) to allow the foot to pass through the entrance  64  of the jaw. Once the foot is received in the jaw the jaw returns to its un-deflected position or a less deflected position so that the tool is ‘clipped’ to the foot. To remove the tool from the foot it is necessary to apply a force to the tool to pull the tool from the foot in the direction of the arm to deflect the lateral extensions to ‘unclip’ the tool from the foot. 
     In an alternative embodiment one or both lateral extensions may pivot between an open position to allow the tool to connect with the foot, and a closed position where the jaw of the tool grabs or closes around a diameter of the foot. For example, each lateral extension may pivot about a vertical axis so that the jaw may present an open state to receive the foot. Once the foot is received in the jaw the lateral extensions are pivoted to close the jaw around the foot. The tool may be provided with an actuator to move the jaw between an open and close position. For example the actuator may comprise a rod that extends from the handle to the jaws of the tool and a mechanism to cause translational movement of the rod along the arm of the tool to rotate the lateral extensions between the open and close positions. The actuator preferably allows the jaw to be operated from the handle end of the tool. 
     The jaw  63  formed by lateral extensions  56  may be described as being C shaped. In some embodiments the jaw extends around diameter  14  of the foot by 180 degrees or less than 180 degrees, to capture the foot laterally to releasably retain the tool to the foot in a lateral direction to releasably maintain engagement between the driving member  51  and the driven member  13  as the driving member drives the driven member for height adjustment of the leg. The tool, although laterally coupled or secured to the foot to maintain engagement between the driven and driving members, may be released from the foot by moving the tool laterally away from the foot in the direction of the arm of the tool. The tool is laterally coupled or secured to the foot in all other lateral directions. To keep the tool engaged with the foot, a user may push the tool against the foot in the direction of the arm. In the embodiment where the jaw extends around the foot by more than 180 degrees, there is no requirement to push the tool against the foot to maintain engagement as the tool is clipped to the foot. 
     For axial alignment of the tool and the foot, in some embodiments the tool comprises an axially facing bearing surface  58  and the foot comprises a corresponding axially facing bearing surface  15 . In some embodiments, contact between the tool and foot axial bearing surfaces  58 ,  15  releasably retain the tool to the foot in an axial direction to releasably maintain engagement between the driving member  52  and the driven member  13 . In some embodiments contact between the axial bearing surfaces of the tool and foot holds the driving member against the driven member. In the embodiments illustrated in  FIGS. 1A to 11 , the axial facing bearing surface  15  is provided by a flange  16  axially spaced from the driving member or feature  13 . The tool is captured axially between the flange  16  and the driving member or feature  13  to axially align the position of the tool correctly to the foot for engagement between the driving member and the driven member. 
     In some embodiments, the tool comprises a first axial facing bearing surface and a second oppositely facing axial surface, for example surfaces  58  and  62 . In the illustrated embodiment of  FIGS. 1A to 11  the first and second axial facing surfaces are captured in a slot or channel extending circumferentially around the foot. A circumferential channel  18  in the foot is defined by the axial bearing surface  15  and the oppositely facing rotary rack  13 . Surface  15  and the driven member  13  form axial sides of the channel  18 . The axial facing surfaces of the tool are provided on the lateral extensions  56 . When aligning the tool with the foot, the first axial facing surface  58  of the tool bears against the foot axial surface  15 , and/or the second axial facing surface  62  of the tool bears against surfaces of the rotary rack  13  to axially locate the tool to the foot. Tooth tips of teeth of the rotary rack  13  form a discontinuous annular axial facing bearing surface. In some embodiments, each tooth comprises a flat portion at a tip of the tooth, as illustrated by the embodiment of  FIG. 26D , the flat portions of the teeth combining to form the discontinuous axial facing bearing surface. 
     In some embodiments, an axial facing surface of the driving member contacts an axial facing surface of the foot to position the tool to the foot in the axial direction. For example, the pinion  51  may be captured between the rack  13  and surface  15 , a tooth tip or tips of the pinion providing an axial facing bearing surface of the tool to contact surface  15  to maintain the driving member  51  in contact with the driven member  13 . With the tool engaged with the foot, the driving member  51  may be axially captured between the driven member  13  and axial facing surface  15 . As the pinion rotates, each tooth tip may contact the surface  15 , each tooth tip providing an axial facing bearing surface as it rotates into contact with the surface  15 . 
     In the illustrated embodiment of  FIGS. 1A to 10 , the driving member is located between lateral extensions  56 . With the driving member  51  located in the jaw of the tool (defined by lateral extensions  56 ), the driving member is located within the circumferential slot or channel  18  that receives the jaw of the tool when the tool is engaged with the foot, and the driven member or feature provides an axial facing surface against which the second axial facing surface of the tool bears for axial positioning. In an alternative embodiment, the driving member  51  may be spaced axially from the jaw, so that the jaw engages with a circumferential slot or channel spaced axially from the driven member or feature  13 . 
     In the illustrated embodiments of  FIGS. 1A to 11 , the driven member  13  is a circular flange comprising a rotary rack and the tool is captured axially between the driven member and the axial facing bearing surface  15  for alignment. In some embodiments, the driven member  13  may be captured between the driving member  51  and a flange extending from the tool to bear against an opposite axial side  19  of the driving member  13 , for example flange  66  (best shown in  FIG. 10 ). In some embodiments, flange  66  of the tool provides a back support for the driven member or feature. Where the object (for example a cabinet) being supported by the foot is heavy, torque transmitted from the driving member to the driven member may produce a force acting to deflect the driven member  13  away from the driving member and out of engagement, or the driving member may tend to lift off the driven member or feature. The flange  66  may support the back or opposite side  19  of the driven member  13  to keep the driven member or feature  13  in contact with the driving member  51 . In some embodiments, with the tool engaged with the foot, the driven member  13  is captured between the lateral flange  66  of the tool and the driving member  51 . In some embodiments, flange  66  provides an axial facing bearing surface  68  to contact corresponding axial facing surface  19  of the foot to releasably maintain engagement between the driving member and the driven member or feature in an axial direction. 
     In some embodiments as described above, the tool is thus axially coupled to the foot in both axial directions. For example the tool cannot lift away from the foot. The tool is released from the foot by pulling the tool laterally away from the foot. That is, to disengage the tool from the foot, the tool is moved radially away from the foot. To disengage the tool from the foot a user only needs to move the tool laterally/radially away from the foot without requiring the user to move the tool axially relative to the foot. For example, the user does not need to lift the tool off the foot before pulling the tool laterally away from the foot. Lifting the tool off the foot can be a difficult or cumbersome task when disengaging the tool from a foot at the rear of a cabinet or other object being supported. Also, with low toe-kick height designs for cabinetry which are becoming increasingly popular (and also often involve obstacles such as plumbing), there is limited or no height clearance making lifting the tool off the foot even more difficult. 
     In some embodiments such as the embodiment illustrated in  FIGS. 1A to 10 , the tool comprises a lateral member  56  that engages a circumferentially extending slot or channel  18  in the foot for axial positioning. In some embodiments, the foot may comprise a disc or circular flange coaxial with the threaded shaft to be received in a corresponding recess or slot in the tool. For example, the driven member or other flange may be received in a horizontal slot of the tool. For example, in some embodiments, a slot may be formed between surface  58  and flange  67  for receiving flange  16  of the foot  10 . In some embodiments, flanges  66  and  67  (best shown in  FIG. 10 ) of the tool may locate on surfaces  19  and  20  of the foot to position the tool relative to the foot in the axial direction. In some embodiments, the tool flanges  66  and  67  provide a first axial facing bearing surface and a second opposite axial facing bearing surface to bear corresponding axial facing bearing surfaces  19  and  20  of the foot. Contact between the tool and foot axial facing bearing surfaces releasably retains the tool to the foot in an axial direction to releasably maintain engagement between the driving member and the driven member or feature. In some embodiments, axial facing surface  62  may provide a guiding surface to bring the driving member and the driven member or feature into initial contact, and surface  68  and surface  19  releasably maintaining engagement between the driving member and the driven member or feature once the driving member and the driven member or feature are engaged. 
     In the illustrated embodiment, the driven member or feature  13  being a rotary rack is positioned to face upwardly. For a right hand threaded shaft, this arrangement ensures that right hand turning (clockwise) of the handle  52  of the tool works to lift the height of the object being supported. In an alternative embodiment the rotary rack may be positioned to face downwards, so that left hand turning of the handle works to raise the supported object. In a further alternative, the threaded shaft may comprise a left hand thread. With the rotary rack facing downwards and a left hand threaded shaft, right hand turning of the handle works to raise the object. The inventor considers that right hand turning of the tool handle for raising the object is a preferred arrangement as right hand turn of the handle to lift the object may be considered to be intuitive by a user. In yet another alternative, the threaded shaft may comprise a left hand thread, and the rack may face upwards so that left hand turning of the of the handle works to raise the supported object. 
     In the embodiments illustrated in  FIGS. 1A to 11 , the driven member or feature  13  is fixed to or on the shaft  11  so that the driven member or feature remains at a fixed height relative to a floor surface or other surface on which the foot is to be positioned when the foot is supporting the weight of the object on the floor surface or other surface. For example, in some embodiments the driven member may be integrally formed with the shaft, or may be attached to the shaft. For such an arrangement, in some embodiments the tool comprises a positioning feature or features for setting the driving member at a height relative to the floor surface or other surface so that the driving member is positioned axially relative to the foot for engagement with the driven member, the height of the driven member and height of the driving member both being referenced from the floor surface or other surface. For example, in the embodiment of  FIGS. 1A to 10 , the tool comprises guides  59  that contact the floor surface to present the tool at the correct height or axial position relative to the foot for engagement with the foot. 
     The guides  59  or axial positioning features may provide an initial alignment of the tool to the foot. The tool may comprise ramp features  60  (best shown in  FIG. 10 ) to accommodate some vertical misalignment between the foot and the tool. For example, in a particular installation, prior to adjustment a foot may be raised off the floor surface so that correct axial positioning of the tool relative to the foot is not initially provided by guides  59 . Guiding axial alignment between the tool and the foot and therefore between the driven member and the driving member is preferably provided by the ramp features bearing against an axial bearing surface of the foot. For example, in the embodiments illustrated in  FIGS. 1A to 10 , the ramps or cam surfaces  60  make sliding contact with the rotary rack to lift or guide the tool into correct axial position with the foot, even when the foot is initially raised slightly off the floor surface. In the illustrated embodiment of  FIGS. 1A to 10 , the ramp or cam surface  60  provides axial alignment of distance X indicated on  FIG. 10 . If foot  10  was initially raised off the floor by distance X, with the tool supported on guides  59  on the floor, as a user pushes the tool into the foot, cam surface  60  will contact the foot and guide the tool to the correct axial position defined by axial facing surface  62 . In some embodiments the ramp surface and the axial facing surface  62  are continuous. 
     In some embodiments, as illustrated in  FIG. 12 , the threaded shaft is received in a threaded component  30  that is adapted to remain at a fixed height relative to the object being supported by the foot. The threaded component  30  is free to rotate relative to the object being supported. In some embodiments the threaded component  30  forms part of a foot assembly  10  or height adjustable leg assembly. The threaded shaft  11  is adapted to be rotationally fixed to the object being supported. For example, the shaft may be provided with a flat longitudinal surface  17  or surfaces to mate with a socket (not illustrated) attached to or formed with the object supported by the foot, the socket comprising a corresponding flat surface or surfaces. A height adjustable leg assembly may comprise the shaft  11 , corresponding socket (not shown) and the threaded component  30 . In such an embodiment the threaded component  30  comprises the driven member or feature  13 , to be driven by the tool to adjust the relative axial positions of the threaded shaft and the threaded component. For example, as shown in  FIG. 12 , the threaded component may comprise a rotary rack  13  to be driven by the driving member  51  of the tool  50 , as described above. The threaded component  30  may be described as a coupling or coupling part of the height adjustable leg for coupling to the tool so that the tool is releasably engaged to the height adjustable leg for height adjustment. 
     In the embodiment of  FIG. 12 , the position of the threaded component  30  is not fixed relative to the floor surface or other surface supporting the base  12  of the foot. The threaded component raises or lowers with the supported object as the foot is adjusted by the tool for height adjustment. In this embodiment, the tool  50  does not locate axially off the floor surface for initial alignment with the foot, as described for the embodiment of  FIGS. 1A to 10 . Final axial and lateral alignment of the tool and the threaded component may be achieved in the same way as described with reference to the embodiment of  FIGS. 1A to 10 . 
     By way of example the foot  10  has been described above as comprising a threaded shaft  11 . For example the driven member  13  may be integrally formed with the threaded shaft, or may be attached or releasably attached to the shaft. In some embodiments, the foot may be provided without or separate to a threaded shaft  11 . For example, a height adjustable leg for supporting a cabinet, appliance or structure may comprise a threaded shaft  11 , and a foot according to some embodiments of the present invention may be adapted to be attached, fixed or fitted to an end of the threaded shaft. For example, as shown in  FIG. 13A , a foot  10  according to some embodiments of the present invention may comprise the driven member  13  and an interface detail for fitting the foot  10  to a shaft  11 . In the illustrated embodiment shown in  FIG. 13A  the interface feature is a socket. The foot comprises the socket  101  for receiving an end  111  of the threaded shaft to attach the foot to the end of the shaft. The shaft may form part of a height adjustable leg for supporting the cabinet, appliance or structure, and the foot is adapted to be fitted to the height adjustable leg. For example, a height adjustable leg may comprise threaded shaft  11  and a threaded socket  5  or component adapted to be attached or fixed to the cabinet or structure or other object to be supported. In the embodiment illustrated in  FIG. 12 , the threaded component  30  may be called a foot. The foot  30  supports a cabinet or other object on the threaded shaft  11 . The threaded shaft provides a leg on which the cabinet or object is supported via the foot  30 . 
     Further embodiments are described with reference to  FIGS. 13A to 24 . In the embodiment of  FIG. 13A , the foot  10  may be described as a coupling or coupling part of a height adjustable leg for coupling to the tool so that the tool is releasably engaged to the height adjustable leg for height adjustment. As described above with reference to  FIGS. 1A to 11 , in some embodiments the axial position of the tool relative to the foot or coupling may be set by a flange extending from the tool that bears against an opposite axial side  19  of the driving member  13 , for example flange  66 , as best shown in  FIG. 10 .  FIG. 13A  illustrates an embodiment that also comprises a flange  66  that bears against the back side  19  of the driven member. In some embodiments the driven member  13  may be captured axially between the driving member  51  and the flange  66 . In some embodiments the driven member may be captured between the flange  66  bearing against a back side  19  of the driven member and a second axial surface  62  (best illustrated in  FIG. 19 ) bearing against surfaces of the rotary rack  13  to axially locate the tool to the foot. Tooth tips of teeth of the rotary rack  13  may form a discontinuous annular axial facing bearing surface. In the embodiment of  FIGS. 13A to 21 , the flange  66  provides a back support for the driven member  13 . Transmitting torque from the driving member to the driven member may produce a force that acts to deflect the driven member  13  away from the driving member and out of engagement, or the driving member may lift off the driven member or feature. In the embodiment of  FIGS. 13 to 21 , the flange  66  supports the back or opposite side  19  of the driven member  13  to keep the driven member or feature  13  in contact or engaged with the driving member  51 . 
     With the tool engaged with the foot, the driven member  13  is captured between the lateral flange  66  of the tool and the driving member  51 , or between the lateral flange  66  and the axial surface  62  bearing against the rotary rack. The flange  66  provides an axial facing bearing surface  68  to contact corresponding axial facing surface  19  of the foot to releasably maintain engagement between the driving member and the driven member or feature in an axial direction. The axial facing surface  19  of the foot may be a discontinuous surface. For example, the back side of the driven member may comprise radial ribs for strength. The ribs may bear against the bearing surface  68  of the tool as the foot rotates when driven by the driving member of the tool. As shown in  FIG. 13B , the foot  10  may be provided without the upper flange  15  of the foot illustrated in  FIG. 2  as the axial alignment of the tool to the foot in  FIG. 13A  is provided by the driven member  13  being received between the driven member and/or axial surface  62  and the flange or back support  66 . The flange  66  contacts the back side of the driven member with the tool engaged with the foot at least at an angular position at which the driving member engages the driven member, to prevent the rotary rack flexing away from the pinion, or the pinion lifting off the rotary rack. Preferably the flange engages the back side of the rack at a perimeter portion of the back side of the rack. In some embodiments the flange supports a substantial portion of the back side of the driven member. For example, the flange  66  may contact more than 50% of the back side of the rotary rack. Preferably the back support  66  contacts the back of the rack by 180 degrees or more around the rack. 
     As shown in  FIGS. 19 and 20 , in some embodiments the tool comprises a first axial facing surface  68  and a second axial facing surface  62 . When aligning the tool with the foot, the first axial facing surface  68  of the tool may bear against the back side  19  of the driven member and the second axial facing surface  62  of the tool may bear against surfaces of the rotary rack  13  to axially locate the tool to the foot. The first and second axial facing surfaces  68 ,  62  face together to form sides of a slot or channel  80 . The driven member  13  is received in the slot  80  and contacts the axial surfaces  68 ,  62  to position the tool axially to the foot. In some embodiments the surfaces  68 ,  62  each have a ramp surface  60  at an opening of the slot of channel to provide converging surfaces extending into the slot to assist with aligning the tool to the foot to ensure correct engagement between the rack and pinion. 
     In some embodiments, the axial distance between the axial facing surfaces  62 ,  68  may be greater than the axial thickness of the driven member  13 , such that the slot  80  allows for some axial misalignment between the foot and the tool. Final alignment of the tool to the foot and engagement of the driving member to the driven member may be achieved by the first axial surface  68  acting on the back side of the rack to pull the driving member  51  onto the driven member  13 . With the driving member engaged with the driven member a gap may exist between the driven member and axial facing surface  62 . 
     In the embodiment illustrated in  FIGS. 13A to 24 , in use the driven member or feature  13  is fixed or attached to or on the shaft  11  so that the driven member or feature remains at a fixed height relative to a floor surface or other surface on which the foot is to be positioned when the foot is supporting the weight of the object on the floor surface or other surface. For such an arrangement, in some embodiments the tool comprises a positioning feature or features for setting the driving member at a height relative to the floor surface or other surface so that the driving member is positioned axially relative to the foot for engagement with the driven member, the height of the driven member and height of the driving member both being referenced from the floor surface or other surface. For example the tool comprises guides or sides  59  that contact the floor surface to present the tool at the correct height or axial position relative to the foot for engagement with the foot. The lateral extensions  56  may act as the guides, a bottom surface of the lateral extension  56  contacts the surface supporting the base of the foot to set the tool at an appropriate height to engage the foot. 
     The guides  59  or axial positioning features may provide an initial alignment of the tool to the foot. The tool may comprise ramp features  60  (best shown in  FIG. 20 ) to accommodate some vertical misalignment between the foot and the tool. For example, in a particular installation, prior to adjustment a foot may be raised off the floor surface so that correct axial positioning of the tool relative to the foot is not initially provided by guides  59 . Guiding axial alignment between the tool and the foot and therefore between the driven member and the driving member is preferably provided by the ramp features bearing against an axial bearing surface of the foot. For example, the ramps or cam surfaces  60  make sliding contact with the rotary rack to lift or guide the tool into correct axial position with the foot, even when the foot is initially raised slightly off the floor surface. 
     For the back support flange  66  to pass underneath or behind the driven member the driven member  13  is spaced from the base  12  of the foot as shown in  FIG. 13B , so that a gap is provided between the surface on which the base of the foot sits and the back side  19  of the driven member. In some embodiments, as shown in  FIG. 17  the back support flange  66  may be approximately C shaped to fit around the base  12  of the foot. In some embodiments the back support flange is approximately C shaped and extends round the base and the driven member by more than 180 degrees. In some embodiments the C shaped back support flange  66  may act as a lateral jaw to capture a diameter of the coupling to laterally position the tool to the foot from the base  12  of the foot, in a similar way to the way in which the jaw  63  formed by lateral extensions  56  fits around diameter  14  of the foot described with reference to the embodiment of  FIGS. 1A to 10 . In the illustrated embodiment an upper jaw is provided by the lateral extensions  56  and a lower jaw is provided by the flange  66 . A benefit of having two axially spaced jaws is that the jaws prevent twisting or bending of the foot, or prevent the tool twisting relative to the foot when driving the foot for height adjustment. Preferably the foot and tool and complementarily sized so that there is a small clearance between each jaw and the diameter or diameters of the foot that the jaws grab around. For example, preferably the radial clearance between the radial face of each jaw and the foot is less than 1 mm. In some embodiments jaw  62  is clamped onto the diameter of the foot. For example the lateral extensions  56  of the jaw may be slightly flexed outwardly with the tool coupled to the foot. 
     In some embodiments the tool may comprise two jaws for laterally positioning the tool to the foot, the two jaws spaced axially apart. In some embodiments the tool may comprise a first jaw positioned on one axial side (for example above) the driven member and a second jaw positioned on the other axial side (for example below) the driven member. 
     In some embodiments the foot may be provided with a base spacer  90 . Such a spacer may be useful where the foot  10  is supporting an object from a surface that is soft, for example a carpeted floor. Where the foot sits on a carpeted floor or other soft surface, the weight of the object being supported by the foot may push the foot down into the carpet or soft surface such that the tool does not correctly align vertically with the foot when attempting to engage the tool to the foot. In such an installation, the spacer attached to the base of the foot takes up vertical displacement of the foot into a soft surface so that the foot and driven member is positioned at a correct vertical height for the tool to engage the foot so that the driving and driven member engage. In some embodiments the spacer is a cap that attaches to the base. The spacer may clip onto or over the base. For example an outer diameter or perimeter of the base may be received in an inner diameter of the spacer. The inventor has found that a spacer height of about 10 mm to 15 mm can be useful for use on a carpeted surface to assist with ensuring the foot is a suitable height for interfacing with the tool. In some installations a spacer may be useful where the foot is supporting an object from a floor surface below an adjacent surface level on which the tool may be positioned. For example, a cabinet may be supported by a foot on a concrete floor. Adjacent to the cabinet the concrete floor may be covered with a floor overlay such as floor boards. In this example, the spacer may be used to raise the foot  10  by the thickness of the floor boards so that the tool positioned on the floor boards may reach the foot at the correct height. In some embodiments, the spacer may have a height of about 10 mm to 20 mm. In some embodiments a range of spacers may be provided, each spacer of a different height to suit different floor surface softness or to account for a height difference between adjacent floor surfaces. For example a plurality of spacers may be provided in the height range of 5 mm to 20 mm. For example there may be a height difference of 0.5 mm or 1 mm between spacers in a plurality of spacers. 
     In the described embodiments the foot may be described as a coupling that forms part of a height adjustable leg assembly. The foot or coupling forms part of a height adjustable leg assembly and couples the tool to the height adjustable leg assembly. The tool  50  and the coupling  10 ,  30  are complementarily adapted to releasably maintain engagement between the driving member and the driven member or feature to allow the driving member to drive the driven member or feature to rotate the coupling about a longitudinal axis of the leg for height adjustment of the leg. For example, the foot  10  of  FIG. 1  comprising the threaded shaft may be described as a coupling. Similarly the foot or threaded component  30  of  FIG. 12  and the foot  10  of  FIG. 13A  (that is adapted to be attached to shaft  11 ) each may be described as a coupling for releasably coupling the tool  50  to the leg to releasably maintain engagement between the driving member and the driven member. 
     In the illustrated embodiments the coupling takes the weight of the object being supported by the height adjustable leg. In some embodiments the coupling may not take any load or weight of the object being supported by a height or length adjustable leg. For example, with reference to the embodiment of  FIG. 13A , a height adjustable leg may comprise a threaded shaft  11 , a corresponding threaded socket as described above (e.g. item  5  in  FIG. 1A ), and a coupling  10  fitted (fixed) to the threaded shaft part way along the threaded shaft  11  (for example a short distance from a bottom end of the threaded shaft) so that the coupling does not contact the floor surface supporting the object on the leg. An end or base of the threaded shaft may contact the floor surface to support the weight of the object being supported by the leg. 
     Further embodiments are described with reference to  FIGS. 25A to 25C . In the embodiment of  FIGS. 25A to 25C  the foot or coupling  10  comprises a driven member  13  integrally formed with a threaded socket  11 . The threaded socket engages a threaded shaft (for example threaded shaft  5  shown in  FIG. 25C ) attached to the object being supported by the foot. The tool of  FIGS. 25A to 25C  comprises a handle  52  as a torque input and may also include a torque input  61  for engaging another tool as described earlier. The driving member  51  of the tool  50  and the torque input  52  are fixed together to rotate only on a lateral axis  115  relative to the longitudinal axis  116  of the leg. That is, in some embodiments as illustrated in  FIGS. 25A to 25C , there is no articulation between the torque input  52 ,  61  and the driving member  51 . 
     Where there is no articulation between the torque input  52 ,  61  and the driving member  51  such that the driving member and the torque input rotate only on the same lateral axis  115 , preferably the lateral axis is at an angle to the longitudinal axis of the leg when the driving member and driven member are engaged. For example, as best illustrated in  FIG. 25C , with the driving member  51  engaged with the driven member  13 , the lateral axis  115  (which may be a longitudinal axis of the tool  50 ) is arranged at an angle to the longitudinal axis  116  of the leg. In other words, with the tool engaged with the foot  10 , the longitudinal axis of the tool on which the driving member and torque input rotate is at an angle to the longitudinal axis of the leg. 
     Without articulation between the driving member and torque input, preferably the lateral axis on which the driving member and torque input rotate is at an angle so that the torque input (for example handle) is raised from the floor surface or other surface on which the foot rests. With the lateral axis at an angle, the handle  52  is raised from the floor surface so that a user can grab the handle or manipulate the torque input more easily than if the torque input was against or closer to the floor. 
     In some embodiments the lateral axis on which the driving member and torque input rotate is at an angle ( 100  in  FIG. 25C ) of 80 to 88 degrees, or 85 to 88 degrees, or 86 to 88 degrees, or 87 to 88 degrees. In a preferred embodiment the angle may be about 87.5 degrees. 
     As described earlier with reference to other embodiments, the tool comprises lateral extensions  56  to laterally engage with a diameter of the coupling  10 . In the embodiment of  FIGS. 25A to 25C  the tool laterally engages to an external diameter of threaded socket  11 . 
     The tool  50  of  FIGS. 25A to 25C  may be simpler than previously illustrated embodiments, for example embodiments of  FIGS. 1A and 13A , for example because the tool of  FIGS. 25A to 25C  does not have articulation between the driving member and the handle. The only moving parts in the tool of  FIGS. 25A to 25C  are the driving member  51 , the torque input, and the shaft connected directly between the handle and the driving member. The driving member  51 , shaft  65  and handle  52  rotate relative to a head of the tool adapted to couple to the coupling  10 . In some embodiments the shaft  65  may not be shrouded by an arm. The embodiment of  FIGS. 25A to 25D  may be a cheaper alternative to a more expensive embodiment. For example the tool of  FIGS. 25A to 25C  may be for home use (and may be used only once or a limited number of times), whereas a more expensive version of the tool may be for a professional installer (of for example cabinetry) where the tool is to be used many times over a long time period. 
     In some embodiments, as illustrated by the embodiment of  FIGS. 25A to 25D , the handle  52  has engagement features on an outside surface. In the particular illustrated embodiment the engagement features are longitudinal slots  110 . In the illustrated embodiment there are four slots  110  spaced apart around a circumference of the handle. There could be more than four slots, or less than four slots, for example two slots oppositely opposed on a circumference of the handle. In some embodiments the engagement features may be longitudinally extending ribs on an outer surface of the handle spaced apart around a circumference of the handle. In some embodiments there may be two or more ribs. 
     The engagement features on the outside of the handle are adapted to engage with an inner surface of a handle extension. For example a handle extension may be a length of pipe or an elongate member with a socket for receiving the handle. An example handle extension  200  is illustrated in  FIG. 25D  partly shown in cross section. Handle  52  of tool  50  is received in a socket  210  of handle extension  200 . The socket has complementary engagement features for example ribs or slots for engaging the slots or ribs on the handle to rotationally lock the handle extension to the handle. The example of  FIG. 25D  has ribs  211  for engaging slots  110  (shown in hidden detail in  FIG. 25D ) of tool handle  52 . The handle extension may provide a further handle  252  for turning the driving member  51  of tool  50  via the engagement with the handle  52  of the tool. The handle extension  200  may allow the tool to reach the legs at the rear of a particularly deep cabinet or other structure being supported by legs comprising a coupling or foot according to some embodiments of the present invention. Further, as the handle extension  200  is detachable from the handle  52 , the tool  50  and handle extension may be of a length to allow both to fit within a typical size of tool box for convenient storage and transportation. In some embodiments the tool handle  52  may comprise an internal bore comprising engagement features for interfacing with corresponding engagement features on an outer surface of a handle extension. 
     The length of the engagement features of the handle  52  for interfacing with the handle extension  200  provides for an inflexible or rigid coupling between the handle and handle extension. By comparison, the torque input  61  for connecting for example a power tool provides for relatively short length of engagement such that the power tool engaging with the socket  61  can be moved (for example pivoted) relative to the tool  50 . However, the engagement between the handle  52  and handle extension provides for no movement between the handle  52  and the handle extension  200 . For example, the socket  211  may engage the handle  52  over a length of at least 50 mm, or 60 mm, or 70 mm or more. 
     In this specification and claims, the phrase “rotary rack” is used to describe a ring gear with axial facing gear teeth, for example a face gear, crown gear or bevel gear. Further, the rotary rack in the illustrated embodiments may be described as a straight bevel gear. A ring gear allows for the driving member or pinion to engage with the driven member from a lateral direction. In a preferred embodiment the driving member and driven member are bevel gears. 
     The gears releasably mesh together in a lateral direction when engaging the tool with the coupling. That is the gears laterally mesh together when engaging the tool with the coupling. The gears are releasably meshed together when the tool is engaged with the coupling. When the tool is disengaged from the coupling the gears are separated. 
     In this specification and claims, the term “gear” is intended to mean a rotary gear that is free to rotate continuously in at least one direction. Preferably the driving member is a gear that is free to rotate in both directions. 
     In some embodiments the rotary rack has an outer diameter in the range of about 30 mm to 100 mm, or about 40 mm to 90 mm, or about 50 mm to 80 mm. In some embodiments, the outer diameter of the rotary rack is about 60 mm, or 70 mm, or 80 mm. 
     In some embodiments the rotary rack has a width (distance between an outer radius and inner radius of the rack face) of about 5 to 20 mm, or about 8 to 15 mm, or about 10 to 12 mm. In some embodiments the rack width is about 10 mm. The pinion may have a length substantially similar to the width of the rotary rack. 
     In some embodiments the rotary rack may have about 40 to 200 teeth, or 50 to 100 teeth, or 60 to 80 teeth, or about 70 teeth. 
     In some embodiments the pinion is generally frustoconical, having a smaller diameter at a forward end (furthest from the handle end of the tool) and a larger diameter at a rearward end (nearest the handle end of the tool). In some embodiments the pinion may be generally cylindrical having straight sides. The pinion may have a diameter of about 5 to 20 mm, or about 7 to 18 mm. Where the pinion is generally frustoconical, in some embodiments the pinion has a diameter at a smaller end of about 5 to 15 mm and a diameter at a larger end of about 10 to 30 mm. In some embodiments, the small end and large end of the pinion have diameters of about 9 to 10 mm and 16 to 17 mm. 
     As described above, in some embodiments the pinion is fixed to the torque input without any articulation between the pinion and torque input. In such an embodiment, the pinion and rack are arranged so that the angle of the lateral axis on which the pinion rotates is at an angle such that the height of the handle or arm of the tool is less than the height of a typical toe-kick height of a cabinet when the tool is engaged to a foot at the rear of the cabinet and with the handle of the tool extending beyond the front of the cabinet. Preferably the pinion and rack are arranged so that the lateral axis of the pinion and torque input is less than about 12.5 degrees so that the handle or arm of the tool clears the bottom of the cabinet. 
     Where the pinion is frustoconical, the toothed surface of the rotary rack is inclined to mesh with the pinion. This arrangement allows for the thickness of the rotary rack at the perimeter of the rotary rack to be less than the thickness of the rotary rack at an inner diameter of the rotary rack (for example where the rack meets the diameter portion  14  of the coupling, or the threaded socket or shaft). 
     In some embodiments, as illustrated in  FIG. 13B , the back side of the rotary rack is inclined, and the surface  68  of the tool that provides a back support for the rotary rack is inclined to match, to support the back of the rack as described above. Where the back side of the rotary rack is inclined, the thickness of the rotary rack at the perimeter of the rotary rack is less than the thickness of the rotary rack at an inner diameter of the rotary rack. 
     A reduced thickness at the outer perimeter of the rack compared to the thickness at the inner perimeter of the rack can assist in some embodiments with engagement of the rack to the pinion. Where the pinion is frustoconical and/or a surface of the back support flange  66  is inclined, the pinion and the back support flange  66  of the tool present an axial gap between the pinion and the flange  66  that converges from the forward end of the pinion towards the rearward end of the pinion. As the thickness of the rack at the perimeter of the rack is less than the axial gap between the pinion and the flange  66  at the forward end of the pinion the driven member of the foot is easily received between the pinion and the surface  68  of the back support flange  66 . In some embodiments this arrangement assists with alignment of the rack to the pinion to ensure the pinion engages with the rack as the tool engages the foot from a lateral direction. For example, where the axial gap between axial surfaces  62  and  68  is greater than the thickness of the driven member  13 , final axial alignment of the tool to the foot and engagement of the pinion to the rotary rack may be achieved by the first axial surface  68  and the pinion capturing the rotary rack between the pinion and surface  68 . In some embodiments, the back support flange  66  may have a ramped surface  81  for receiving the rack between the pinion and the flange. 
     Preferably the back side  19  of the rack is at an angle of 0 to 12.5 degrees (where 0 degrees is perpendicular to the longitudinal axis of the foot). An acute angle or perpendicular is preferred so that the flange  66  exerts a predominantly upward component of force to counteract the pinion lifting off the rack or the rack deflecting from the pinion when the pinion drives the rack. For example, with reference to  FIGS. 26A to 26D , in some embodiments the back side of the rack  13  comprises a portion  19  that is substantially perpendicular to the longitudinal axis of the foot. Preferably the perpendicular portion  19  is at a perimeter portion of the back side of the rack. As shown in  FIG. 26B , the flange  66  of the tool has a corresponding axial facing bearing surface  68  that is also perpendicular to the longitudinal axis of the tool when the tool is engaged with the foot. 
     Other gear arrangements may be envisaged. For example, in some embodiments, the driving member and driven member may comprise spur gears, when meshed together the driven member and driving member having parallel rotational axis. The driving member may be a pinion and the driven member a gear, the pinion and gear having parallel rotational axes. In such an embodiment, a worm gear or bevel gear or universal joint or joints may couple the driving member to tool handle  52  or torque input. 
     In some embodiments the foot or coupling may be formed from a plastics material, for example moulded from Acetal or other suitable plastics material. The tool may also be generally formed from plastics materials, for example Acetal, polypropylene and/or ABS. The pinion of the tool may be formed from steel or a suitable plastics material, for example glass filled nylon. In the embodiments of  FIGS. 10 and 19  the shaft  65  may be formed from steel, and in the embodiment of  FIGS. 25A and 25C  the shaft may be formed from Aluminium, for example a hollow extrusion. 
     A foot or coupling and a tool according to the present invention are adapted so that the tool remains continuously engaged with the driven member or feature when driving the driven member or feature to rotate the coupling or foot. For example, the tool can rotate the coupling by a part revolution, a full revolution, or many revolutions and in both directions without being disengaged from the coupling. The tool does not need to be disengaged and reengaged from and to the coupling during complete adjustment of the leg height. The tool can adjust the length of the leg up and down without disengaging the tool from the coupling. The tool is adapted to be held stationary in a circumferential direction relative to the leg when the driving member drives the driven member or feature for adjusting the height of the object supported by the leg. Thus the tool is not limited to working in a particular arc length around the leg, but remains in a stationary angular position relative to the leg during height adjustment. With the driving member engaged to the driven member or feature, rotation of the tool handle or other torque input about an axis independent of the longitudinal axis of the leg (e.g. the shaft of the foot) drives the driven member or feature for height adjustment of the leg. The tool may be used to adjust the leg in both directions without removing the tool from the coupling. For example, the handle of the tool may be rotated in one direction (for example clockwise) to increase the height of the leg and then in the opposite direction (anti-clockwise) to reduce the height of the leg, while the tool remains continuously engaged to the leg. In other words, the tool is adapted so that the direction of height adjustment (up or down) can be reversed without removing the tool from the coupling. The driving member stays continuously engaged with the driven member to effect a change in height of the leg in at least one direction. For example, in some embodiments the tool can drive the coupling by more than 180 degrees, or 270 degrees, or at least one full revolution, or 2 revolutions, or 3 revolutions or more, in either or both directions without disengaging the driving member from the driven member. The handle of the tool remains stationary or does not rotate substantially around the leg, for example by less than one full revolution, or less than 270 degrees, or less than 180 degrees, or less than 90 degrees, or less than 45 degrees. The tool is adapted to adjust the height of the leg by many degrees of rotation of the coupling for minimal degrees of rotation of the tool about the about the longitudinal axis of the leg. 
     In some embodiments the driving member stays continuously engaged with the driven member to effect a change in height of the leg in both directions. This is particularly useful for fine tuning the height of a leg to achieve a level installation of a cabinet or other object. Where an adjustment in one direction overshoots a height level, adjustment in the opposite direction can be made immediately without removing the tool from the foot. This can be a significant advantage when adjusting the heights of many legs in a single installation, for example when installing kitchen cabinetry which often includes 30 or more legs. Typically some legs require adjustment upwards and others require adjustment downwards, requiring many changes in direction of adjustment. Likewise, there is no need to disengage a third party torque input such as a power drill, to change direction. When installing cabinetry having many legs for height adjustment, the speed and simplicity of adjustment provided by the tool and coupling of the present invention provides a substantial contribution to the art. 
     A user holds the tool stationary relative to the leg, for example by arm  53  of the tool with one hand, while turning the tool handle to adjust the leg height with the other hand, or simply by handle  52  or another tool coupled to tool  50  via socket  61 . In use, as the driving member is used to drive the driven member, the arm of the tool does not rotate about the longitudinal axis of the leg but may remain stationary. Further, the tool can engage the foot or coupling laterally from essentially any angular direction relative to a longitudinal axis of the threaded shaft of the leg. These features of the tool and foot provide a significant advantage when installing and levelling cabinetry, especially in circumstances where access to one or more legs is limited. For example, with reference to  FIGS. 27A and 27B  which illustrate a plan and a side view of a narrow cabinet installed in the corner of a room. Access to the rear left foot is available at a narrow radial position, access being limited by an adjacent wall and also obstructions under the cabinet, which in the illustrated example is plumbing fittings or pipe work and a front leg. In such a limited space, adjustment by a prior art tool that scribes an arc about the foot is very difficult. For a tool as described, adjustment of the rear foot is accomplished with the arm of the tool remaining stationary in the limited angular position shown and with the tool continuously engaged with the foot. 
     In some embodiments the driven member or feature remains at a fixed height relative to a floor surface or other surface supporting the leg at least when driving the coupling to raise the object being supported. The tool axial position may therefore be referenced from the floor surface for engagement with the coupling, to assist with engagement between the tool and foot. 
     As described above the leg may be used for height adjustment. Where a leg is used for sideways support, the longitudinal axis of the threaded shaft would be oriented horizontally. For example the present invention may be applied to a leg supporting a side of a cabinet or appliance from an adjacent wall. In this specification and claims, the term “height” is not intended to be limited to use only in vertical orientation but any orientation. Thus the term “height” in this specification and claims should be read broadly to mean “length” or “distance”. 
     The foregoing description of the invention includes preferred forms thereof. Modifications may be made thereto without departing from the scope of the invention.