Patent Publication Number: US-11376617-B2

Title: Spray device and methods of assembly and use

Description:
BACKGROUND 
     Known spray devices are often bulky, cumbersome, difficult to interpret, or incapable of bearing common force overloads. Consequently, there is a desire for a spray device with design features that reduce an overall size and weight of the spray device; manufacturing expediencies; maintaining function and remaining safe while withstanding loads such as “overcharge” torque and the long term loading from a loading spring; producing high quality sprays, and improving viscous spray quality by reducing pressure losses through the flow path; improving the number of times the device may be re-used; ensuring that the actuating mechanism is easily actuated by a user and returns reliably; and achieving a clean spray cut off without dribble. 
     BRIEF DESCRIPTION 
     According to one aspect, a spray device includes a bottle portion, a sleeve, and an engine. The engine includes a spring that when compressed pressurizes a chamber containing a dispensable amount of fluid from the bottle portion. The sleeve and the engine are configured to be torquable onto the bottle without compressing the spring. 
     According to another aspect, a spray device includes a bottle portion, a sleeve, and an engine. Rotation of the sleeve relative to the bottle by a user pressurizes a chamber containing fluid from the bottle. The sleeve is configured such that auditory and/or tactile feedback is provided to the user during rotation of the sleeve thereby allowing the user to select an amount of the fluid to be dispensed. 
     According to another aspect, a spray device includes a bottle, a sleeve, and an engine. The engine includes a spring that when compressed pressurizes a chamber containing a dispensable amount of fluid from the bottle. The spring is enclosed between a cup and a cap, which have been fused together. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front view of a spray device. 
         FIG. 2  is a perspective view of the spray device in a priming step. 
         FIG. 3  is a side view of the spray device in a dispensing step. 
         FIG. 4  is an exploded perspective view of the spray device. 
         FIG. 5  is a partial cross-sectional view of the spray device. 
         FIG. 6  is a perspective view of a sleeve of the spray device. 
         FIG. 7  is a partial perspective view of the sleeve. 
         FIG. 8  is a cross-sectional front view of a cup of the spray device. 
         FIG. 9  is a perspective view of a cap of the spray device. 
         FIG. 10  is a perspective view of the cap of the spray device. 
         FIG. 11  is a perspective view of a vent of the spray device. 
         FIG. 12  is a partial cross-sectional view of the vent of the spray device. 
         FIG. 13  is a cross-sectional side view of a spray channel of the spray device. 
         FIG. 14  is a perspective view of the channel of the spray device. 
         FIG. 15  is a perspective view of a nozzle of the spray device. 
         FIG. 16  is a perspective view of a stem of the spray device. 
         FIG. 17  is a perspective view of a stem of the spray device according to an alternative embodiment. 
         FIG. 18  is a perspective view of a stem of the spray device according to an alternative embodiment. 
         FIG. 19  is a perspective view of a stem of the spray device according to an alternative embodiment. 
         FIG. 20  is a perspective view of a stem of the spray device according to an alternative embodiment. 
         FIG. 21  is a perspective view of a valve of the spray device. 
         FIG. 22  is a perspective cross-sectional view of the spray device. 
         FIG. 23  is a perspective view of a screw of the spray device. 
         FIG. 24  is a cross-sectional front view of the screw of the spray device. 
         FIG. 25  is a perspective view of a nut of the spray device. 
         FIG. 26  is a cross-sectional front view of the nut of the spray device. 
         FIG. 27  is a perspective view of a piston of the spray device. 
         FIG. 28  is a cross-sectional perspective view of the piston of the spray device. 
         FIG. 29  is a cross-sectional perspective view of a washer of the spray device. 
         FIG. 30  is a perspective view of a button of the spray device. 
         FIG. 31  is a perspective view of the button of the spray device. 
         FIG. 32  is a cross-sectional side view of the button of the spray device. 
         FIG. 33  is a partial front view of a bottle portion of the spray device. 
         FIG. 34  is a perspective view of the spray device in a first step of disassembly with the bottle portion. 
         FIG. 35  is a perspective view of the spray device in a second step of disassembly with the bottle portion. 
         FIG. 36  is a partial cross-sectional front view of the spray device. 
         FIG. 37  is a partial cross-sectional front view of the spray device according to another embodiment. 
         FIG. 38  is a partial cross-sectional front view of the spray device of  FIG. 37 . 
         FIG. 39  is a perspective view of an exhaust valve of the spray device of  FIG. 37 . 
         FIG. 40  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 41  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 42  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 43  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 44  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 45  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 46  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 47  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 48  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 49  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 50  is a cross-sectional front view of the spray device in a step of assembly. 
         FIG. 51  is a cross-sectional front view of the spray device assembled. 
         FIG. 52  is a partial cross-sectional side view of the spray device in a charged state. 
         FIG. 53  is a partial cross-sectional view of the spray device with the button depressed into the spray device. 
         FIG. 54  is a partial cross-sectional view of the spray device in a dispensed stated. 
         FIG. 55  depicts a travel sequence of the button when the button is depressed. 
         FIG. 56  depicts a partial perspective view of the spray device exposing a clicker device. 
         FIG. 57  depicts an enlarged section of  FIG. 56  including the clicker device. 
         FIG. 58  depicts partial cross-sectional view of the spray device according to an alternative embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     It should, of course, be understood that the description and drawings herein are merely illustrative and that various modifications and changes can be made in the structures disclosed without departing from the present disclosure. Referring now to the drawings, wherein like numerals refer to like parts throughout the several views,  FIG. 1  depicts a spray device  100  which includes a top portion  102  and a bottle portion  104 . The spray device  100  includes a spray device exterior surface  110  that defines a substantially cylindrical profile taken from a front view as shown in  FIG. 1 . The top portion  102  includes a sleeve  112  configured for receiving the bottle portion  104  such that the top portion  102  is flush with the bottle portion  104 . In this manner, the spray device exterior surface  110  is continuous between the top portion  102  and the bottle portion  104  when the bottle portion  104  is engaged with the top portion  102 . The substantially cylindrical profile of the spray device exterior surface  110  defines a spray device longitudinal axis  114 . 
     The spray device  100  is configured to dispense liquid spray in a process that includes a priming step and a dispensing step. The priming step of the spray device  100  is depicted in  FIG. 2 , where the top portion  102  is twisted clockwise about the spray device longitudinal axis  114  relative to the bottle portion  104 . As shown, the spray device exterior surface  110  is configured for being gripped by a user at each of the top portion  102  and the bottle portion  104 , where a two-handed twist charges the spray device  100  and primes a dose of liquid spray as a dispensable amount of liquid spray for the dispensing step. The liquid spray is formed from a fluid that may be a gas and/or a liquid, and may include particles, filaments, or other non-liquid elements suspended therein without departing from the scope of the present disclosure. 
     Because the top portion  102  is flush with the bottle portion  104 , a user may grip the spray device exterior surface  110  at a location overlapping each of the top portion and the bottom portion, forming an ergonomic gripping surface on the spray device exterior surface  110  between the top portion and the bottle portion. As shown, the top portion  102  is twisted clockwise relative to the bottle portion  104  to prime the spray device  100 , however the spray device  100  may be alternatively configured such that the priming step calls for the top portion  102  twisted counterclockwise relative to the bottle portion  104  without departing from the present disclosure. Also, the spray device  100  may be alternatively configured such that the priming step calls for twisting the top portion  102  either clockwise or counterclockwise relative to the bottle portion  104 , or a series of clockwise and/or counterclockwise directions relative to the bottle portion  104  without departing from the scope of the present disclosure. 
       FIG. 3  depicts the dispensing step, where a top portion top surface  120  defined by a button  122  is pressed to relieve liquid spray  124  from a nozzle  130 . The nozzle  130  is inserted into the top portion  102 , and is configured to dispense the liquid spray  124  in a direction that is substantially radially outward from the spray device exterior surface  110  and substantially perpendicular to the spray device longitudinal axis  114 . 
       FIG. 4  depicts an exploded view of the spray device  100 . As depicted, an engine  132  is housed in the spray device  100  between the top portion  102  and the bottle portion  104 . The engine  132  is configured for delivering liquid spray to the nozzle  130  from a dip tube  134  which extends into the bottle portion  104  when the spray device  100  is assembled, providing the engine  132  access to liquid spray contained in the bottle portion  104 . A spray channel  140  is selectively engageable with the engine  132 , which includes, a cap  142 , a vent  144 , and a cup  150  disposed in line from the top portion  102  to the bottle portion  104  along the spray device longitudinal axis  114 . 
       FIG. 5  depicts a vertical cross-section of the spray device  100  with the engine  132  assembled, and housed in top portion  102  and the bottle portion  104 . As depicted, the spray channel  140  is biased upward along the spray device longitudinal axis  114  toward the button  122  with a return spring  152  disposed between the spray channel  140  and a screw  160 . A stem  162  is inserted in a stem inlet  164  of the spray channel  140 , which is centered on the spray device longitudinal axis  114 . The spray channel  140  supports the nozzle  130  in the top portion  102  such that the nozzle  130  is aligned with a spray slot  170  defined in the top portion  102 . 
     The cup  150  is threaded onto the bottle portion  104  such that the cup  150  attaches and retains the cap  142 , a main spring  172 , a nut  174 , and a piston  180  to the bottle portion  104 . The cup  150 , a piston  180 , and the screw  160  in combination form a chamber  182  sealed with a volume that varies as the piston  180  slides along the cup  150  and the screw  160  in a direction parallel with the spray device longitudinal axis  114 . The chamber  182  is effectively sealed such that liquid spray does not leak from the chamber  182  and ambient air does not penetrate the chamber  182 . The dip tube  134  is housed in the cup  150 , in selective fluid communication with the chamber  182 . A ball  184  is seated in the cup  150  so as to form a one way valve between the dip tube  134  and the chamber  182  which allows liquid spray to enter the chamber  182  from the dip tube  134 , and prevents liquid spray from leaving the chamber  182  to the dip tube  134 . 
     The main spring  172  is disposed between and contained within the cup  150  and the cap  142 . The main spring  172  is a compression spring centered on and directed along the spray device longitudinal axis  114 , and is configured for biasing the piston  180  toward a cup bottom  190 . The main spring  172  includes a spring top end  192  that abuts the cap  142  and a spring bottom end  194  that abuts the nut  174 , where the nut  174  is configured to pass a spring force exerted by the main spring  172  onto the cup  150  through to the piston  180 . The nut  174  is also threaded with the screw  160 , such that rotational movement of the screw  160  about the spray device longitudinal axis  114  results in linear translation of the nut  174  along the spray device longitudinal axis  114 . 
     At an interface between the sleeve  112  and the bottle portion  104 , a sleeve bottom end portion  200  extends downward around a bottle portion top end portion  202  to abut a bottle portion lower ledge  204  formed thereon, where a sleeve bottom surface  210  of the sleeve bottom end portion  200  abuts and slidingly engages the bottle portion lower ledge  204 . A sleeve inner surface  212  and a bottle portion exterior surface  214  are rounded with respect to the spray device longitudinal axis  114  and are radially spaced from each other with respect to the spray device longitudinal axis  114 . In this manner, the top portion  102  and the bottle portion  104  are configured for rotating relative to each other when the bottle portion  104  is engaged with the top portion  102 . 
       FIG. 6  depicts the sleeve  112  including the sleeve bottom end portion  200 , a sleeve top end portion  220  configured for receiving the button  122 , the spray device exterior surface  110  at the top portion  102 , and the spray slot  170 . As shown, the spray slot  170  extends integrally from the top portion  102  in a direction radially outward from the spray device longitudinal axis  114  when the top portion  102  is assembled with the spray device  100 . The spray slot  170  is configured to form a clearance with a cone of liquid spray dispensed from the nozzle  130 . 
       FIG. 7  depicts a partial view of the sleeve  112 , exposing at least one sleeve rib  222 , a clicker blade  224 , a sleeve upper bearing  230 , and a sleeve lower bearing  232 . As shown, the at least one sleeve rib  222  extends along the sleeve top end portion  220 , in parallel with the spray device longitudinal axis  114  when the top portion  102  is assembled with the spray device  100 . The at least one sleeve rib  222  extends across the sleeve upper bearing  230 , toward the sleeve bottom end portion  200 . The at least one sleeve rib  222  is configured to constrain the spray channel  140  in a rotational position about the spray device longitudinal axis  114  with respect to the sleeve  112 , and transfer torque about the spray device longitudinal axis  114  between the sleeve  112  and the spray channel  140 . The clicker blade  224  is disposed on a sleeve rib bottom portion  234  of the at least one sleeve rib  222 , extends toward the cap  142 , and is configured to produce at least one audible click with complementary features of the cap  142  when the top portion  102  is twisted relative to the bottle portion  104 , signaling to a user that a dose of liquid spray is being charged. 
     The sleeve upper bearing  230  includes an upper bearing detent  240  configured to constrain the cap  142  to a longitudinal position of the sleeve  112  with respect to the spray device longitudinal axis  114 . The sleeve lower bearing  232  is configured to surround a circumference of the cap main wall  290  so as to constrain the cap  142  radially about the spray device longitudinal axis  114  with respect to the sleeve  112  when the spray device  100  is assembled. 
       FIG. 8  depicts a cross-sectional view of the cup  150 . As shown, the cup bottom  190  forms a downward axial bearing for the screw  160 , and the cup  150  further includes a cup wall  242  formed from a cup wall top portion  244  and a cup wall bottom portion  250 . The cup wall top portion  244  is a radial bearing for the screw  160 , and at least one cup wall track  252  is defined in a cup wall inner surface  254  at the cup wall top portion  244 . The at least one cup wall track  252  is complementary to radially outward facing features of the nut  174  and is configured for catching respective at least one feature of the nut  174  so as to rotationally constrain the nut  174  with respect to the cup  150  about the spray device longitudinal axis  114 . 
     The cup wall inner surface  254  at the cup wall bottom portion  250  forms the chamber  182  with the piston  180 . To this end, the cup wall inner surface  254  at the cup wall bottom portion  250  is a seal surface configured for engaging and forming a seal with the piston  180  effective for preventing a leak of liquid spray or penetration of ambient atmosphere into the chamber  182 . 
     A dip tube inlet  260  is centered on the cup bottom  190 , and defined in the cup bottom  190  across a cup passage  262  from a cup ball valve seating  264  along the spray device longitudinal axis  114 . The dip tube inlet  260  is configured for receiving the dip tube  134 , fixing the dip tube  134  with the cup  150 , and bringing the dip tube  134  in fluid communication with the cup ball valve seating  264 . The cup ball valve seating  264  is configured for receiving the ball  184  so as to form the one way valve. 
     At least one cup rib  270  integrally extends radially outward from the cup wall top portion  244 , the at least one cup rib  270  being configured for engaging the bottle portion  104  so as to fix the cup  150  with the bottle portion  104 . A cup rib outer face  272  of the at least one cup rib  270  includes at least one sleeve bearing  274  configured to abut the sleeve inner surface  212  when the cup  150  is assembled with the sleeve  112 . When the sleeve  112 , the bottle portion  104 , and the cup  150  are assembled, the at least one sleeve bearing  274 , the sleeve  112 , and the bottle portion  104  occupy a same longitudinal position of the spray device  100  such that a radial force applied to the spray device  100  at the longitudinal position passes through each of the at least one sleeve bearing  274 , sleeve  112 , and the bottle portion  104 . The at least one cup rib  270  further includes at least one vent retention clip  280  extending radially inward from a cup rib inner surface  282  at a longitudinal position located toward the cup wall top portion  244 . 
     In the illustrated embodiment, when the spray device  100  is assembled, the cup  150  is hidden from view from outside the spray device  100  by at least the sleeve  112 . However, in an alternative embodiment, an outer flange of the cup  150  is exposed to view from outside the spray device  100 , for example, through a combination of extending the at least one cup rib  270  and shortening the sleeve  112 . This alternative embodiment allows the exposed outer flange to serve as a non-rotating surface that can be gripped by equipment to screw the top portion  102  onto the bottle without charging the engine  132 , when the spray device  100  is assembled. 
     As shown in  FIG. 9 , the cap  142  includes a cap top face  284 , a cap main wall  290 , a cap flange  292  extended from the cap main wall  290 , a cap weld wall  294 , and a cap bottom face  300 . The cap main wall  290  integrally extends downward and radially outward from the cap top face  284  to the cap flange  292 , and the cap weld wall  294  extends integrally downward from the cap main wall  290  so as to receive spin welding geometry of the cup  150  at the cup wall top portion  244 . In an embodiment, the cap  142  and the cup  150  are formed from the same material and are spin welded together so as to form a single unitary piece featuring integrally formed components. In further embodiments, the material choice of the cap  142  and the cup  150  exclude slip, mold release, or antistatic additives, since these materials can adversely affect the quality of the spin-welds. In embodiments, at least one of the cap  142  and the cup  150  are formed from polypropylene (PP), and in further embodiments at least one of the cap  142  and the cup  150  are formed from polyethylene (PET). Notably, alternative materials having similar properties to PP and/or PET may be employed in the cap  142  and/or the cup  150  without departing from the scope of the present disclosure. In an alternative embodiment of the spray device  100 , the cap  142  and the cup  150  are joined using clips (not shown). In further alternative embodiments of the spray device  100 , the cap  142  and the cup  150  are joined using clips instead of being joined by spin welding. 
     The cap flange  292  extends radially outward from the cap main wall  290 , with a radial circumference defined by a cap flange outer face  302 . A clicker channel  304  is defined in the cap flange  292  between the cap main wall  290  and the cap flange outer face  302  in a radial direction perpendicular to the spray device longitudinal axis  114 . The clicker channel  304  includes at least one clicker rib  310  disposed therein. The clicker blade  224  is disposed in the clicker channel  304  when the top portion  102  is assembled with the cap  142 , the at least one clicker rib  310  being configured for engaging the clicker blade  224  when the top portion  102  is twisted relative to the bottle portion  104 , and by extension the sleeve  112  is twisted relative to the cap  142 . When the at least one clicker rib  310  engages the clicker blade  224 , a click sound audible to a user handling the spray device  100  is produced, the click sound corresponding with a dose of liquid spray being charged to a given extent. The upper bearing detent  240  of the sleeve  112  projects radially inward from the sleeve inner surface  212  and the cap flange  292  is configured to catch the upper bearing detent  240 , including at the cap flange outer face  302 . 
     As shown in  FIG. 10 , at least one screw retention clip  312  extends integrally downward and radially inward from the cap top face  284 , the at least one screw retention clip  312  being configured for engaging the screw  160  and retaining the screw  160  to the cap  142 . In the depicted in embodiment, the at least one screw retention clip  312  is six screw retention clips, however more or fewer similar screw retaining clips may be employed in the spray device  100  without departing from the scope of the present disclosure. 
     A cap main spring contact face  314  is defined on a cap interior surface  316  configured to face the cup  150  when the cap  142  and the cup  150  are assembled, the cap main spring contact face  314  being configured to abut and retain the main spring  172 . Each of the cap main spring contact face  314  and the spring top end  192  can be flattened to increase a contact surface area between the cap  142  and the main spring  172  at the cap main spring contact face  314  and the spring top end  192 . 
     The cap bottom face  300  is located at a cap weld wall bottom end  320 , is shaped substantially flat toward the cup  150 , and is oriented substantially perpendicular to the spray device longitudinal axis  114  when the spray device  100  is assembled. In this manner, the cap weld wall  294  including the cap bottom face  300  is configured for engaging the weld geometry of the cup  150 . As depicted in  FIG. 8 , weld geometry of the cup includes a cup shoulder  322  with a cup top face  324  defining a top most surface of the cup  150 . As depicted in  FIG. 5 , the cup top face  324  and the cap bottom face  300  are shaped substantially flat toward each other, and are oriented substantially perpendicular to the spray device longitudinal axis  114  when the spray device  100  is assembled. Also, the cap weld wall  294  surrounds and contacts the cup shoulder  322  so as to form a weld surface between the cap  142  and the cup  150 . 
     When the spray device  100  is assembled, the vent  144  is configured to provide a seal between the bottle portion  104  and the cup  150  to prevent liquid spray leakage, and allow ambient air to vent into the bottle portion  104  to replace dispensed liquid spray. As shown in  FIG. 11 , the vent  144  is substantially ring shaped and includes a vent inner face  330 , a vent outer face  332 , a vent top end portion  334 , and a vent bottom end portion  340 . The vent inner face  330  includes a vent cup retention face  342  at the vent top end portion  334 , the vent cup retention face  342  being configured to retain the cup  150  in the vent  144  and form a seal with the cup  150  when the spray device  100  is assembled. The vent inner face  330  includes a vent lower inner face  344  at the vent bottom end portion  340 , and when the vent  144  is sealed with the cup  150  and the bottle portion  104 , the vent lower inner face  344  continues a sealed surface between the cup  150  and the bottle portion  104 . 
     The vent outer face  332  includes a vent bottle sealing face  350  at the vent bottom end portion  340 , which is configured to create a seal with the bottle portion  104  when the cup  150 , bottle portion  104 , and the vent  144  are assembled. When the cup  150 , bottle portion  104 , and the vent  144  are assembled, the cup  150  is engaged with the vent cup retention face  342  and the bottle portion  104  is engaged with the sealing face such that the vent outer face  332  continues a sealed surface between the cup  150  and the bottle portion  104 . 
       FIG. 12  depicts a partial cross section of the vent  144 . As shown, a vent groove  352  is defined in the vent  144 , on the vent inner face  330  at the vent top end portion  334 . A vent detent  354  is formed on the vent inner face  330  between the vent groove  352  and a vent top face  360 , the vent detent  354  being configured to retain the vent  144  to the cup  150 . In an embodiment, the vent  144  is formed from low density polyethylene (LDPE). In another embodiment, the vent  144  is formed from thermoplastic polyurethane (TPU). Notably, alternative materials similar to LDPE and TPU may be employed in the vent  144  without departing from the scope of the present disclosure. 
     The spray channel  140  houses the nozzle  130  and provides a flow path for liquid spray between the stem  162  and the nozzle  130 . As shown in  FIG. 13 , a flow path is formed from the stem inlet  154  and a spray channel passage  362  defined in the spray channel  140 , the spray channel passage  362  extending between the stem inlet  154  and a nozzle boss  364  configured for supporting the nozzle  130  on the spray channel  140 . The stem inlet  154  is defined in the spray channel  140  with a radial location centered on the spray device longitudinal axis  114  and an orientation parallel with the spray device longitudinal axis  114  when the spray device  100  is assembled. With this construction, the radial position of the stem  162  in the stem inlet  154  does not vary about the spray device longitudinal axis  114  when the top portion  102  and by extension the spray channel  140  is twisted relative to the bottle portion  104 . A stem inlet interior surface  370  forms an interface with the stem  162 , where the stem inlet interior surface  370  forms a seal with the stem  162  effective for maintaining an internal operating pressure between the stem  162  and the spray channel  140  without leaking any liquid spray. The nozzle boss  364  is substantially cylindrical, and in this manner is configured for supporting the nozzle  130  without requiring a specific rotational position of the nozzle  130  with respect to nozzle boss  364  and the spray channel  140 . 
     The spray channel  140  provides a clutch configured for selective engagement with the screw  160  so as to convert rotational movement of the sleeve to rotational movement of the screw and axial movement of the nut. As shown in  FIGS. 13 and 14 , the spray channel  140  includes at least one spray channel leg  372  located radially outward of a spray channel ring segment  374 , the at least one spray channel leg  372  extending downward toward the cap flange  292  when the spray device  100  is assembled. Each of the at least one spray channel leg  372  is configured for engagement with the at least one sleeve rib  222  extended radially inward from the sleeve  112 . The at least one spray channel leg  372  respectively abuts the at least one sleeve rib  222  in a rotational direction of the sleeve  112  relative to the bottle portion  104  about the spray device longitudinal axis  114  so as to transfer rotational forces between the at least one spray channel leg  372  and the at least one sleeve rib  222 . 
     The spray channel ring segment  374  is supported on the at least one spray channel leg  372  at a spray channel ring segment exterior surface  380  and features at least one spray channel clutch tooth  382  extending radially inward from the spray channel ring segment  374  on a spray channel ring segment interior surface  384 . Each of the at least one spray channel one clutch tooth  382  includes a lead-in segment  390  that is inclined from the spray channel ring segment  374  toward the spray device longitudinal axis  114 , downward along the spray device longitudinal axis  114 . In the depicted embodiment, the at least one spray channel clutch tooth  382  is six spray channel clutch teeth disposed between consecutive spray channel legs of the at least one spray channel leg  372  about the spray channel ring segment  374 , however more or fewer spray channel clutch teeth may be employed with varying distribution patterns along the spray channel ring segment  374  without departing from the scope of the present disclosure. The at least one spray channel clutch tooth  382  is configured to directly engage the screw  160  and transmit torque between the screw  160  and the spray channel  140 . 
     The at least one spray channel clutch tooth  382  includes a clutch tooth clip  392  extending toward the return spring  152 . The clutch tooth clip  392  is configured to retain the return spring  152  on the at least one spray channel clutch tooth  382 . In an embodiment, the spray channel  140  is formed from high density polyethylene (HDPE). In another embodiment, the spray channel  140  is formed from polypropylene (PP). In another embodiment, the spray channel  140  is formed from polyoxymethylene (POM). Notably, the spray channel  140  may be formed from materials similar to HDPE, PP, and/or POM without departing from the scope of the present disclosure. Also, in the depicted embodiment of the spray channel  140  the at least one spray channel leg  372  is three spray channel legs, however more or fewer spray channel legs may be employed in the spray channel  140  without departing from the scope of the present disclosure. 
     The nozzle  130  is configured to produce an atomized spray, given a supply of pressurized liquid spray introduced from the spray channel passage  362 . With reference to  FIG. 15 , the nozzle  130  includes a nozzle main wall  394  which extends between a nozzle back face  400  and a nozzle mounting face  402 . An outer periphery of the nozzle main wall  394  defines a nozzle outer face  404 . The nozzle outer face  404  is a retention face configured for retaining the nozzle  130  in the spray channel  140  as an interface between the nozzle  130  and the spray channel  140  at the nozzle boss  364 . 
     The nozzle mounting face  402  includes at least one swirl vane  410  defined therein, with each of the at least one swirl vane  410  being directed from a periphery of the nozzle mounting face  402  at the nozzle main wall  394  toward a center of the nozzle mounting face  402  which features a nozzle orifice  412  defined therein. The at least one swirl vane  410  is defined with a decreasing width from the periphery of the nozzle mounting face  402  to the center of the nozzle mounting face  402 . Each of the at least one swirl vane  410  has a direction leading off center of the nozzle orifice  412  and into a swirl chamber  414  defined in the nozzle mounting face  402 , so as to facilitate a swirl in fluid flow of the liquid spray when the liquid spray is dispensed from the spray device  100 . Notably, other nozzle  130  and spray channel  140  designs which produce different spray patterns with regard to particle size, velocity, cone angle and other aspects of a spray pattern, and nozzle  130  and spray channel  140  designs that produce foams or jets of fluid that do not break into a spray may be employed without departing from the scope of the present disclosure. 
     The stem  162  is configured to selectively allow fluid flow therethrough, from the screw  160  to the spray channel  140 . As shown in  FIG. 16 , the stem  162  includes a stem wall  420  including a stem top end portion  422 , a stem bottom end portion  424 , a stem interior surface  430 , and a stem exterior surface  432 . The stem  162  includes a stem flange  434  extending radially outward from the stem exterior surface  432  at the stem top end portion  422 . The stem flange  434  has a longitudinal position offset from a stem top end face  440 , forming retention geometry of the stem  162  configured for retaining the stem  162  in the stem inlet  154 . 
     At least one stem orifice  442  is defined in the stem  162  and is configured for passing liquid spray through the stem wall  420  from the stem exterior surface  432  to the stem interior surface  430 , at the stem bottom end portion  424 . In the depicted embodiment, the at least one stem orifice  442  is four stem orifices evenly spaced circumferentially about the stem  162  at a same longitudinal position along the stem  162 . The stem exterior surface  432  at the stem bottom end portion  424  defines a sealing face that extends above a top most part of the at least one stem orifice  442 , and extends below a bottom most part of the at least one stem orifice  442 , along the spray device longitudinal axis  114 . Notably, the at least one stem orifice  442  may include more or fewer similar orifices that may or may not be evenly disposed about a circumference of the stem  162 , and that may or may not share a same longitudinal position along the stem  162 , without departing from the scope of the present disclosure. 
     The stem  162  includes a stem lead-in segment  444  that is radially inclined downward about the spray device longitudinal axis  114 . The incline of the stem lead-in segment  444  converges to a stem bottom face  450 . In an embodiment, the stem  162  is formed through injection molding and the stem bottom face  450  is an injection location used in forming the stem  162 . In an embodiment, the stem  162  is formed from polyoxymethylene (POM). Notably, alternative materials and methods of forming the stem  162  may be employed without departing from the scope of the present disclosure. 
     In an alternative stem  162  embodiment depicted in  FIG. 17  that does not feature the at least one stem orifice  442 , the stem  162  includes a stem first channel  452  and a stem second channel  454  defined in the stem  162  by an obstruction  460  disposed in the stem  162 , within the stem interior surface  430 . The stem first channel  452  and the stem second channel  454  are defined through the stem exterior surface  432 , configured to allow fluid flow into the stem  162 , and individually extend through the stem bottom end portion  424  to the stem top end portion  422 . The stem first channel  452  and the stem second channel  454  are defined through the stem wall  420  on radially opposite sides of the stem  162  with respect to the spray device longitudinal axis  114 , such that the stem first channel  452  and the stem second channel  454  are evenly disposed about a circumference of the stem  162 . The obstruction  460  extends axially midway into the stem  162 , such that the stem first channel  452  and the stem second channel  454  end midway in the stem  162 . With this construction, fluid flow in the stem first channel  452  and the stem second channel  454  combines into a single flow path at the end of the obstruction  460 , before reaching the spray channel  140 , reducing a pressure drop across the stem  162  when the liquid spray is dispensed. 
     In an alternative stem  162  embodiment depicted in  FIG. 18 , the stem  162  includes a stem first channel  462 , a stem second channel  464 , and a stem third channel  470  defined in the stem  162  by an obstruction  472  and the stem interior surface  430 . The stem first channel  462 , the stem second channel  464 , and the stem third channel  470  are configured to allow fluid flow into the stem  162  and individually extend through the stem bottom end portion  424  along the length of the obstruction  472 . The stem first channel  462 , the stem second channel  464 , and the stem third channel  470  are defined through the stem exterior surface  432  such that the stem first channel  462 , the stem second channel  464 , and the stem third channel  470  are evenly disposed about a circumference of the stem  162 . The obstruction  472  extends midway into the stem  162  such that the stem first channel  462 , the stem second channel  464 , and the stem third channel  470  end midway in the stem  162 . With this construction, fluid flow in the stem first channel  462 , the stem second channel  464 , and the stem third channel  470  combines into a single flow path before reaching the spray channel  140 , reducing a pressure drop in the stem  162  when the liquid spray is dispensed. 
     In an alternative stem  162  embodiment depicted in  FIG. 19 , the stem  162  includes a U-shaped channel  474  defined between the stem interior surface  430  and an obstruction  480 . The U-shaped channel  474  is configured to allow fluid flow into the stem  162  and extends through the stem bottom end portion  424 . The obstruction  480  extends midway into the stem  162 , restricting a cross-sectional area defined by the stem interior surface  430  and a fluid flow rate through the stem  162  at the obstruction  480 . The obstruction  480  defining the U-shaped channel  474  ends midway in the stem  162  along the spray device longitudinal axis  114  such that fluid flow in the stem  162  is unrestricted by the obstruction  480  before reaching the spray channel  140 , reducing a pressure drop across the stem  162  when the liquid spray is dispensed. 
     In an alternative stem  162  embodiment depicted in  FIG. 20 , a stem opening  482  is defined through the stem wall  420  and an obstruction  484  disposed in the stem  162  includes a first protrusion  490  and a second protrusion  492  which extend through the stem bottom end portion  424  from the stem opening  482  to a longitudinal position of the stem  162  midway through the stem  162 . The first protrusion  490  and the second protrusion  492  reduce a cross-sectional area inside the stem  162 , reducing a pressure drop across the stem  162  when liquid spray is dispensed. 
     A valve  494  is configured to create a seal between the stem  162  and the screw  160 , preventing air ingress and/or leakage of liquid spray between the stem  162  and the screw  160 . As shown in  FIG. 21 , the valve  494  includes a valve ring segment  500 , a valve outer wall  502  extending downward from the valve ring segment  500 , and a valve detent  504  extending upward and radially outward from the valve ring segment  500 . The valve  494  is housed in the screw  160 , and the valve detent  504  is configured to abut a complementary projection extending from the screw  160  so as to retain the valve  494  in the screw  160 . A valve outer wall exterior surface  510  defines an interface between the valve  494  and the screw  160 , and forms a sealing surface between the valve  494  and the screw  160  effective to prohibit liquid spray or ambient air from passing between the valve  494  and the screw  160 . 
     In  FIG. 22 , a valve inner wall  512  extends from the valve ring segment  500 , and a valve inner wall interior surface  514  defines an interface between the valve  494  and the stem  162 , and forms a sealing surface between the valve  494  and the stem  162  effective to prohibit liquid spray or ambient air from passing between the valve  494  and the stem  162 . The valve inner wall  512  is formed from an upper sealing blade  520  which extends upward from the valve ring segment  500  and a lower sealing blade  522  which extends downward from the valve ring segment  500 . An upper sealing blade interior surface  524  extends the valve inner wall interior surface  514  upwards relative to the valve ring segment  500  and a lower sealing blade interior surface  530  extends the valve inner wall interior surface  514  downward relative to the valve ring segment  500 . The upper sealing blade  520  and the lower sealing blade  522  extend sufficiently far from the valve ring segment  500  so as to cover the stem bottom end portion  424  at each of the at least one stem orifice  442 . In an embodiment, the valve  494  is formed from low density polyethylene (LDPE), however similar materials may be employed in forming the valve  494  without departing from the scope of the present disclosure. 
     The screw  160  brings the stem  162  and the chamber  182  in fluid communication, and is configured to function as a clutch which converts rotational movement of the sleeve  112  and spray channel  140  into linear axial movement of the nut  174  along the spray device longitudinal axis  114 . As shown in  FIG. 23 , the screw  160  is formed from a screw main wall  532  forming a screw top end portion  534  and a screw bottom end portion  540 . A screw flange  542  extends radially outward from the screw top end portion  534  at a screw top end  544 , and is configured for engagement with the spray channel  140 . Specifically, the screw flange  542  includes at least one screw clutch tooth  550  corresponding with the at least one spray channel clutch tooth  382 , where the at least one screw clutch tooth  550  is configured to respectively interlink and rotationally fix with the at least one spray channel clutch tooth  382 . 
     Screw threading  552  disposed on a screw main wall outer surface  554  extends between the screw flange  542  and a screw sealing face  560  configured for engaging the piston  180 , along the spray device longitudinal axis  114 . The screw threading  552  provides an interface with the nut  174 , such that when the screw  160  is rotated with the spray channel  140 , the nut  174  is driven linearly along the spray device longitudinal axis  114 , with complementary features of the nut  174  sliding along the at least one cup wall track  252 . The screw threading  552  further includes a screw threading stop  562 , which is a face ending the screw threading  552  and functions as a rotational end stop against the nut  174  corresponding with an end of charging a dose of liquid spray. 
     The screw sealing face  560  allows the piston  180  to slide against the screw  160  and maintain the seal of the chamber  182 . The length of the screw sealing face  560  along the spray device longitudinal axis  114  is sufficient to enable the nut  174  and the piston  180  to travel a distance along the spray device longitudinal axis  114  corresponding with dispensing at least one dose of liquid spray. The screw main wall  532  defines a screw channel  564  extended through a screw hole  570  at a screw bottom end  572  at the screw bottom end portion  540 . 
     As depicted in  FIG. 24 , a screw bottom end lip  574  extends radially inward from screw main wall  532  at the screw bottom end  572 , into the screw hole  570 . The screw bottom end lip  574  is configured to obstruct passage of the ball  184  into the screw channel  564 , while enabling passage of the liquid spray into the screw channel  564 . 
     In an embodiment, the screw  160  is formed from polyoxymethylene (POM). In another embodiment the screw  160  is formed from polyethylene (PET). Notably, the screw  160  may be formed of materials similar to POM and/or PET without departing from the scope of the present disclosure. 
     The nut  174  is configured to convert rotational movement of the screw  160  around the spray device longitudinal axis  114  into linear axial movement of the nut  174 , the main spring  172 , and the piston  180  along the spray device longitudinal axis  114 . As depicted in  FIGS. 25 and 26 , the nut  174  is formed from a nut inner wall  580  and a nut outer wall  582  joined to the nut inner wall  580  through a nut floor  584  at a nut bottom end portion  590 . The nut floor  584  is configured to retain the main spring  172  in the longitudinal direction, while the nut inner wall  580  and the nut outer wall  582  restrict radial movement of the main spring  172  with respect to the spray device longitudinal axis  114 . In this manner, the nut  174  is configured to house the main spring  172 , and be driven by the main spring  172  across the cup  150  along the spray device longitudinal axis  114  when the top portion  102  is rotated relative to the bottle portion  104 . 
     The nut outer wall  582  includes at least one nut outer wall ridge  592  corresponding with and complementary to the at least one cup wall track  252 . When the at least one nut outer wall ridge  592  is respectively engaged with the at least one cup wall track  252 , the nut  174  is rotationally fixed with the cup  150  and is able to slide along the spray device longitudinal axis  114  relative to the cup  150 . 
     The nut inner wall  580  includes nut threading  594  defined therein at a nut top end portion  600 . The nut threading  594  engages with and is complementary to the screw threading  552 , such that when the screw threading  552  is rotated and slides along the nut threading  594 , the nut threading  594  drives the nut  174  linearly along the spray device longitudinal axis  114 . The nut threading  594  includes at least one nut threading end face  602  defining an end of the nut threading  594  that is a rotational end stop between the screw  160  and the nut  174 . 
     The nut inner wall  580  includes at least one nut inner wall detent  604  defined in a nut inner wall inner surface  610  and configured for engaging complementary features of the piston  180 . The nut outer wall  582  includes at least one nut outer wall detent  612  disposed on a nut outer wall outer surface  614  and configured for engaging complementary features of the piston  180 . When the at least one nut inner wall detent  604  and the at least one nut outer wall detent  612  are respectively engaged with the piston  180 , the nut  174  is fixed with the piston  180  at the nut bottom end portion  590 . 
     In an embodiment, the nut  174  is formed from polycarbonate (PC). In an alternative embodiment, the nut  174  is formed from Polyoxymethylene (POM). In an alternative embodiment, the nut  174  is formed from polyamide (PA). In an alternative embodiment, the nut  174  is formed from polyethylene (PET). Notably, the nut  174  may be formed from materials similar to PC, POM, PA, and/or PET without departing from the scope of the present disclosure. 
     The piston  180 , the cup  150 , and the screw  160  together form the chamber  182 , which is sealed sufficiently to prevent liquid spray from leaking from the chamber  182 , and to prevent ambient air from penetrating the chamber  182 . When the spray device  100  is assembled, the piston  180  is fixed to the nut bottom end portion  590 , and is configured for engaging the cup  150  as an end stop of the nut  174 . As shown in  FIG. 27 , the piston  180  includes a piston inner wall  620  and a piston outer wall  622  connected to the piston outer wall  622  across a piston web  624 . A piston inner flat  630  disposed on a piston inner wall top end portion  632  is a sealing surface formed from a piston inner upper sealing blade  634  and a piston inner lower sealing blade  640  respectively extending upwards and downwards from the piston inner wall top end portion  632 , the piston inner flat  630  being configured for engaging and sealing against the screw sealing face  560 . A piston outer flat  642  disposed on a piston outer wall top end portion  644  is a sealing surface formed from a piston outer upper sealing blade  650  and a piston outer lower sealing blade  652  respectively extending upward and downward from the piston outer wall top end portion  644 , the piston outer flat  642  being configured for engaging the cup wall inner surface  254  at the cup wall bottom portion  250 . 
     With reference to  FIG. 28 , the piston inner wall  620  includes a piston inner wall detent  654  formed on a piston inner wall outer surface  660 , the piston inner wall detent  654  being configured for engaging the nut  174  and fixing the piston  180  with the nut  174 . The piston outer wall  622  includes a piston outer wall detent  662  formed on a piston outer wall inner surface  664 , the piston outer wall detent  662  being configured for engaging the nut  174  and fixing the piston  180  with the nut  174 . In an embodiment, the piston  180  is formed from low density polyethylene (LDPE), however a material similar to LDPE may be employed in forming the piston  180  without departing from the scope of the present disclosure. 
     An embodiment of the spray device  100  includes a washer  670  disposed in the cap  142  configured for retaining the spring top end  192 . As shown in  FIG. 29 , the washer  670  includes a washer top face  672  having a curvature that fits within and conforms to the cap bottom face  300 , where the washer  670  is configured for being seated. The washer  670  includes a washer bottom face  674  configured for retaining the main spring  172  in an axial direction along the spray device longitudinal axis  114 . At least one washer rib  680  extends downward from the washer bottom face  674  and is configured for retaining a radial position of the main spring  172  relative to the cap  142  with respect to the spray device longitudinal axis  114 . In an embodiment, the washer  670  is formed from polypropylene (PP), however a similar material may be employed in forming the washer  670  without departing from the scope of the present disclosure. 
     The button  122  is configured for being depressed into the spray device  100  by a user, in turn depressing the spray channel  140  relative to the screw  160 . As shown in  FIGS. 30 and 31 , the button  122  includes a button press face  682  that is the top portion top surface  120 , and is configured for being depressed by a user. A button outer ring  684  defines an outer periphery of the button  122  configured to fit within the sleeve top end portion  220 . The button outer ring  684  includes a button outer ring tab  690  extending downward from a button outer ring bottom surface  692 . 
     The button  122  includes a button inner ring  694  and a button middle ring  700  disposed between the button outer ring  684  and the button inner ring  694  in a radial direction of the button  122  with respect to the spray device longitudinal axis  114 . Each of the button inner ring  694  and the button middle ring  700  are configured to engage the spray channel  140 , and transfer axial motion between the button  122  and the spray channel  140  in a direction parallel with the spray device longitudinal axis  114 . 
     The button middle ring  700  includes at least one button clip  702  configured to fix the button  122  with the spray channel  140 . As shown in  FIG. 32 , the at least one button clip  702  is tapered at a button clip bottom end  704 . In the depicted embodiment, the at least one button clip  702  is three clips, however more or fewer clips may be employed without departing from the scope of the present disclosure. In an embodiment, the button is formed from polypropylene (PP), however a similar material may be employed in forming the button  122  without departing from the scope of the present disclosure. 
     The bottle portion  104  is configured to store a reservoir of liquid spray, and attach to the cup  150  such that the bottle portion  104  and the cup  150  may be rotated together relative to the sleeve  112  in charging a dose of liquid spray. In  FIG. 33 , the bottle portion top end portion  202  includes a bottle portion upper ledge  710 , the bottle portion lower ledge  204 , a bottle portion upper neck  712  between the bottle portion upper ledge  710  and a bottle portion upper end  714  along the spray device longitudinal axis  114 , and a bottle portion lower neck  720  between the bottle portion upper ledge  710  and the bottle portion lower ledge  204  along the spray device longitudinal axis  114 . 
     The bottle portion upper neck  712  includes a threaded section with at least one upper thread  722 , at least one lower thread  724 , and at least one bottle portion detent  730  extended from the bottle portion exterior surface  214 , the threaded section being configured for engaging complementary features of the cup  150  so as to fix the cup  150  with the bottle portion  104 . The bottle portion  104  also includes at least one bottle portion stop  732  respectively provided after a rotational end point of the at least one upper thread  722  and the at least one lower thread  724 . The at least one bottle portion stop  732  is a rotational end stop for the cup  150  during attachment of the cup  150  to the bottle portion  104 , and in charging a dose of liquid spray. With this construction, the cup  150  is screwed onto the bottle portion  104  until the bottle portion  104  abuts the bottle portion upper ledge  710  and the at least one bottle portion stop  732 , where the at least one bottle portion detent  730  rotationally retains the cup  150  with the bottle portion  104 , fixing the cup  150  with the bottle portion  104 . 
     The bottle portion lower ledge  204  is configured to support the sleeve  112  on the bottle portion  104 , and allow the sleeve  112  to rotate about the spray device longitudinal axis  114  relative to the bottle portion  104 . To this end, the bottle portion exterior surface  214  at the bottle portion lower neck  720  is smooth and rounded about the spray device longitudinal axis  114 , and the sleeve inner surface  212  at the bottle portion lower neck  720  is smooth and rounded about the spray device longitudinal axis  114  so as to fit around the bottle portion lower neck  720 . 
     The bottle portion  104  contains a reservoir of liquid spray and is chemically resistant to the liquid spray. As an exterior component of the spray device  100 , the bottle portion  104  is also impact resistant. In an embodiment, the bottle portion  104  is formed from polyethylene (PET). In another embodiment, the bottle portion is formed from polypropylene (PP). Notably, the bottle portion  104  may be designed to a variety of specific tolerances and/or formed from a variety of similar materials without departing from the scope of the present disclosure. 
     The bottle portion  104  is replaceable to the remainder of the spray device  100 . The bottle portion  104  is removed from the spray device  100  by twisting the bottle portion  104  relative to the sleeve  112  in a direction opposite from when the spray device  100  is charging a dose of liquid spray as shown in  FIG. 34 , and pulling the bottle portion  104  from the sleeve  112  as shown in  FIG. 35 . The spray device  100  requires a torque to screw the cup  150  onto the bottle portion  104  that is less than a torque required for charging a dose of liquid spray in the spray device  100 . This allows for assembly of the cup  150  and the bottle portion  104  without charging the spray device  100 . 
     Alternative spray device  100  designs may be employed to bring an abrupt end to dispensing a dose of liquid spray.  FIG. 36  depicts an embodiment of the spray device  100  where the piston  180  is an end stop. To this end, as depicted, the piston  180  ends dispensing of a dose of liquid spray by contacting the cup bottom  190  such that the main spring  172  cannot pressurize the liquid spray. As depicted, a piston bottom surface  734  is substantially flat with an incline toward the cup bottom  190  about the spray device longitudinal axis  114 , and the cup bottom  190  includes a cup bottom upper surface  740  that is complementary to the piston bottom surface  734 , the cup bottom upper surface  740  being flat with a radial incline away from the piston  180  about the spray device longitudinal axis  114 . 
       FIGS. 37 and 38  depict an alternative embodiment of the spray device  100  where the ball  184  is replaced with an exhaust valve  742  configured to allow liquid spray to enter the chamber  182  from the dip tube  134 , and prevent liquid spray from exiting the chamber  182  to the dip tube  134 . To this end, the exhaust valve  742  is configured for actuating from an open position to a closed position, and maintain the closed position from a start of dispensing liquid spray depicted in  FIG. 37 , to an end of dispensing liquid spray depicted in  FIG. 38 . When the exhaust valve  742  is actuated in the open position, a flow path for liquid spray is open through the exhaust valve  742  to allow liquid spray to travel from the dip tube  134  to the chamber  182 . The end of dispensing liquid spray occurs when the piston  180  is actuated downward such that a piston ledge  744  engages the exhaust valve  742  and the cup  150 , and actuates the exhaust valve  742  into the closed position by pressing sufficiently downward on the exhaust valve  742 . 
     As depicted in  FIG. 39 , the exhaust valve  742  is formed from an exhaust valve ball  750  including a ball exhaust valve sealing surface  752  and a tail  754 . The ball exhaust valve sealing surface  752  creates a seal with the cup  150  when the exhaust valve  742  is seated in the cup  150 . The tail  754  extends radially outward from the exhaust valve  742 , and is configured for being pressed by the piston  180  so as to actuate the exhaust valve  742  into the closed position, and otherwise pressed by fluid pressure in the liquid spray so as to actuate the exhaust valve  742  into the open position. As such, an end of dispensing liquid spray occurs when the tail  754  is actuated sufficiently downward by the piston ledge  744  so as to actuate the exhaust valve  742  into the closed position. 
     An embodiment alternative to the ball  184  and the exhaust valve  742  embodiments depicted in  FIGS. 36-39  is a valve formed through screw orifices. In the embodiment, the screw orifices are formed through laser drilling. 
       FIGS. 40-51  depict steps in a method of assembling the spray device  100 .  FIG. 40  depicts the vent  144  assembled with the cup  150 , where the vent detent  354  catches the cup  150 , fixing the vent  144  with the cup  150 . Notably, no rotational alignment between the cup  150  and the vent  144  is required for assembling the cup  150  and the vent  144 .  FIG. 41  depicts the ball  184  dropped in the cup  150 , seated on the cup ball valve seating  264 . A next step in the method of assembling the spray device  100  includes assembling the piston  180  with the nut  174  as depicted in  FIG. 42 , and lubricating the piston outer flat  642  before assembling the piston  180  and the nut  174  with the cup  150  as depicted in  FIG. 43 . As depicted, the nut  174  and the cup  150  have complementary features in the at least one cup wall track  252  and the at least one nut outer wall ridge  592  which, when engaged, maintain a rotational alignment between the nut  174 , the piston  180 , and the cup  150 . 
       FIG. 44  depicts the main spring  172  uncompressed and dropped in the nut  174  such that the spring bottom end  194  is seated on the nut floor  584 , between the nut inner wall  580  and the nut outer wall  582 . A lubricant is applied to the main spring  172  or the cap  142  at the cap bottom face  300  where the main spring  172  contacts the cap  142 . As depicted in  FIG. 45 , the cap  142  is lowered onto the main spring  172  and the cup  150 , compressing the main spring  172  such that the main spring  172  is prestressed in the spray device  100 . The cup  150  and the cap  142  are spin welded together, forming a single unitary piece containing the main spring  172 . In an embodiment of the assembly method, the cup  150  and the cap  142  are actively cooled after being spin welded together. The spring top end  192  and the spring bottom end  194  are ground to respectively mate with the cap  142  and the nut  174 . In an embodiment, the main spring  172  has a free length/diameter ratio of approximately 3.95, however a variety of length/diameter ratios may be employed in the main spring  172  without departing from the scope of the present disclosure. 
       FIG. 46  depicts the screw  160  assembled with the cup  150 , the piston  180 , the nut  174 , and the cap  142 . Before the screw  160  is inserted through the cap  142 , the nut  174 , and the piston  180 , the screw threading  552  and the screw sealing face  560  are lubricated.  FIG. 47  depicts the valve  494  inserted into the screw  160 , with the valve outer wall  502  forming a seal with the screw sealing surface, where the valve  494  is fixed relative to the screw  160  with a valve detent  504  that catches a screw detent  760  complementary with the valve detent  504 . 
       FIG. 48  depicts a spray channel subassembly  762  formed from the spray channel  140  assembled with the nozzle  130 , the stem  162 , and the return spring  152 . As depicted, the stem  162  is inserted into the stem inlet  154  until the stem flange  434  abuts a spray channel bottom end face  764 . The return spring  152  is seated on the spray channel bottom end face  764  around the stem  162 , and the nozzle  130  is inserted onto the nozzle boss  364 . 
     The spray channel subassembly  762  is assembled with the valve  494  and screw  160  in  FIG. 49 . As depicted, the stem  162  is inserted into the valve  494 , the return spring  152  is seated in the screw  160 , resting on the screw detent  760 , and the at least one spray channel clutch tooth  382  is fitted with the at least one screw clutch tooth  550 . 
       FIG. 50  depicts the sleeve  112  assembled with the engine  132 . As depicted, the at least one sleeve bearing  274  contacts the sleeve inner surface  212  so as to fix the cup  150  in a radial position with the sleeve  112 , with respect to the spray device longitudinal axis  114 . Also, the upper bearing detent  240  catches the cap flange  292 , fixing the cap  142  in a longitudinal position with respect to the sleeve  112 .  FIG. 51  depicts an assembled spray device  100 , where the dip tube  134  is inserted into the dip tube inlet  260 , and the bottle portion  104  fixed to the cup  150 , over the dip tube  134 . 
       FIGS. 52-54  depict a method of charging and dispensing a dose of liquid spray with the spray device  100 . As depicted in  FIG. 52 , the sleeve  112  is rotated relative to the bottle portion  104  such that the main spring  172  is compressed and presses the piston  180  and the nut  174  against the cap  142 . The nut  174  and the piston  180  are also driven to slide along the cup  150  such that the piston  180  draws a dose of liquid spray, as a dispensable amount of fluid, into the chamber  182 . In this manner, a torque applied to the engine  132  that compresses the main spring  172  draws a dispensable amount of fluid into the chamber  182 . 
     As also depicted in  FIG. 52 , the ball valve formed between the ball  184  and the cup  150  is closed and prevents liquid spray from returning to the bottle portion  104  from the chamber  182 . Because the valve  494  is closed with the stem  162 , liquid in the chamber  182  cannot leave and the piston  180  remains stationary. Under these circumstances, a dose of liquid spray in the spray device  100  is charged. The at least one bottle portion stop  732  prevents excessive compressing of the main spring  172  and consequential overcharging the spray device  100 . Notably, aspects of the charge torque, pressure in the cup, compressive force required by the button, and volume of liquid spray dispensed are exemplary and can be modified without departing from the scope of the present disclosure. 
     As depicted in  FIG. 53 , the button  122  is pressed downwards, disengaging the at least one spray channel clutch tooth  382  and the at least one screw clutch tooth  550 . When the button  122  is pressed, the spray channel  140  presses the stem  162  downward through the valve  494 , pressing the at least one stem orifice  442  beyond the valve inner wall interior surface  514  and opening a flow path for the liquid spray through the stem  162 . With a flow path from the chamber  182  to the nozzle  130  open, pressure from the main spring  172  actuates the piston  180  to contract the chamber  182  and dispense a dose of liquid spray through the screw  160 , the stem  162 , the spray channel  140 , and the nozzle  130 . Because the button  122  may be released at any time, when the screw  160  may be at any point of rotation relative to the spray channel  140 , the at least one spray channel clutch tooth  382  is configured to engage the at least one screw clutch tooth  550  at any relative rotational angle to facilitate a return of the button  122  to an extended position. 
     As shown in  FIG. 54 , dispensing the liquid spray ends when the piston bottom surface  734  contacts the cup bottom  190 , ending the pressure exerted on the chamber  182  by the main spring  172 . Dispensing the liquid spray may also end when a user stops pressing the button  122 , which repositions the at least one stem orifice  442  back in the valve  494 , sealing fluid flow between the stem  162  and the screw  160 . A process of depressing the button  122  from the extended position begins with disengaging the at least one screw clutch tooth  550  from the at least one spray channel clutch tooth  382 , which allows the screw  160  to rotate relative to the spray channel  140 , allowing the main spring  172  to drive the nut  174  and by extension the piston  180  downwards, contracting the chamber  182 . The spray device  100  is configured to disengage the at least one screw clutch tooth  550  from the at least one spray channel clutch tooth  382  before uncovering the at least one stem orifice  442  from under the valve  494  with respect to the screw  160 . Uncovering the at least one stem orifice  442  opens a flow path from the chamber  182  to the nozzle  130 . When the button  122  is fully depressed, the spray channel  140  bottoms out on the cap  142 , where a spray channel leg bottom end  770  of the at least one spray channel leg  372  abuts the cap  142 . 
       FIG. 55  depicts a travel sequence of the button  122  corresponding with disengaging the at least one screw clutch tooth  550  from the at least one spray channel clutch tooth  382 . As depicted in a first sequence of button movement  772 , the button  122  takes a total travel distance of approximately 4 mm between the extended position and a bottomed out position. Disengaging the at least one screw clutch tooth  550  from the at least one spray channel clutch tooth  382  as the first sequence of button movement  772  occurs over the first approximate 2.5 mm of button  122  travel. The button  122  travels an additional approximate 0.6 mm as a clearance  774  to ensure the at least one screw clutch tooth  550  is fully disengaged from the at least one spray channel clutch tooth  382 , and approximately 1.8 mm of additional button  122  travel is a second sequence of button movement  780  that corresponds with uncovering the at least one stem orifice  442  from under the valve  494 . An additional 0.1 mm of button  122  travel occurs before the button  122  reaches the bottomed out position. 
     As shown in  FIGS. 56 and 57 , the clicker blade  224  and the at least one clicker rib  310  together form a clicker device that produces an audible click when the sleeve  112  rotates an incremental distance relative to the cap  142 . With a click produced at each incremental distance traveled by the sleeve  112  relative to the cap  142 , the clicker device indicates an extent to which the spray device  100  is charged, and how much liquid spray the spray device  100  is configured to dispense. Notably, the sleeve  112  and the cap  142  do not rotate relative to each other when the liquid spray is being dispensed, such that the clicker device does not produce audible clicks when liquid spray is being dispensed. 
     As depicted, the at least one clicker rib  310  is four clicker ribs disposed about the clicker channel  304 , such that the clicker device may produce four audible clicks as the spray device  100  is being charged, however a different number of clicker blades  224  and clicker ribs  310  may be employed in the spray device  100  to produce a different number of audible clicks over a different range of rotation between the sleeve  112  and the cap  142 , without departing from the scope of the present disclosure. 
     In an alternative embodiment of the spray device  100  depicted in  FIG. 58 , the at least one cup rib  270  is extended and configured for being exposed from under the sleeve  112  and forms part of the spray device exterior surface  110  with the bottle portion  104 . With this construction, the at least one cup rib  270  is configured for being rotated about the spray device longitudinal axis  114  independent to the screw  160  and without applying torque to the engine  132 , and is only linked with applied torque through the threaded section of the bottle portion top end portion  202 . With this construction, it is possible to cap the spray device  100  after filling the bottle portion  104  without charging the spray device  100 . Because the liquid spray does not require a propellant, the bottle portion  104  may be completely filled with liquid spray without leaving room for propellant in the bottle portion  104 . 
     It will be appreciated that various embodiments of the above-disclosed and other features and functions, or alternatives or varieties thereof, may be desirably combined into many other different systems or applications. Also that various presently unforeseen or unanticipated alternatives, modifications, variations or improvements therein may be subsequently made by those skilled in the art which are also intended to be encompassed by the following claims.