Patent Publication Number: US-2019174943-A1

Title: Ornamental tree having an adjustable base

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of U.S. application Ser. No. 14/994,714, filed Jan. 13, 2016, and entitled ADJUSTABLE BASE FOR AN ORNAMENTAL TREE, which is incorporated herein by reference in its entirety. 
    
    
     TECHNICAL FIELD 
     This disclosure relates to an adjustable base for an ornamental tree and to methods of using the tree and the base. 
     BACKGROUND 
     When decorating a space, such as during holidays, it is often desirable to include trees as part of such decorations. To allow such decorations to last substantially indefinitely without maintenance and allow for repeated cycles of storage and deployment of such decorations. In some circumstances, it is desirable to provide artificial trees rather than live trees. Examples of such decorations are Christmas trees typically deployed during holiday seasons occurring near the end or beginning of each calendar year. 
     SUMMARY 
     This disclosure relates to an adjustable base for an ornamental tree and to a method for using an adjustable base with an ornamental tree. 
     In one example, an apparatus includes a ground support portion adapted to rest upon an underlying surface. An adjustable riser is attached to and extends from the ground support along a longitudinal axis to terminate in a distal end portion. The distal end portion of the riser is adapted to support a trunk of an ornamental tree, the adjustable riser comprising an adjustment component adapted to adjust a height of the distal end portion of the riser along the longitudinal axis with respect to the ground support portion between a first height and a second height. 
     In another example, a method includes placing a ground support portion of a base unit onto an underlying surface. The base unit includes an adjustable riser attached to and extending from the ground support portion along a longitudinal axis thereof to terminate in a distal end portion. The distal end portion of the riser is adapted to support both ends of an elongated trunk of a tree having spaced apart first and second ends. The method also includes mounting one of the first end or the second end of the trunk to the distal end portion of the adjustable riser and adjusting a height of the adjustable riser to adjust a height of the tree relative to the underlying surface where the base unit is placed. 
     In yet another example, a collapsible ornamental tree includes a base unit and a trunk. The base unit includes a ground support adapted to rest upon an underlying surface, wherein a given portion of the ground support includes at least two wheels thereon, and another portion of the ground support does not include any wheels thereon. An adjustable riser extends outwardly from the ground support along a longitudinal axis to terminate in a distal end portion, the longitudinal axis being transverse to a plane extending through the ground support. A trunk of elongate form extends between a first end and a second end. Both the first end and the second end are adapted to be supported separately by the base unit when attached to the distal end portion of the adjustable riser. A plurality of limbs are pivotably attached to the trunk and moveable between a display condition and a storage condition. When the first end of the trunk is connected to the distal end portion of the adjustable riser, the branches are in the display condition as to be closer to horizontal than the storage condition. When the second end of the trunk is connected to the distal end portion of the adjustable riser, the branches are in the storage condition as to be closer to vertical than the display condition. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates an example of a perspective view of an adjustable base for an ornamental tree, the base configured for supporting a trunk of the ornamental tree thereon in both a deployed orientation and a collapsed orientation. 
         FIG. 2  illustrates another example of a perspective view of an adjustable for an ornamental tree. 
         FIG. 3  illustrates yet another example of a perspective view of an adjustable for an ornamental tree. 
         FIG. 4  illustrates an example connector for an adjustable riser of the base. 
         FIG. 5  illustrates another example connector for an adjustable riser of the base. 
         FIG. 6  illustrates yet another example connector for an adjustable riser of the base. 
         FIG. 7  illustrates yet another example connector for an adjustable riser of the base. 
         FIG. 8  illustrates a front view of the base and ornamental tree shown in the deployed configuration, with the adjustable riser at a first height, and with a treetop portion shown in broken lines. 
         FIG. 9  illustrates a front view of the base and ornamental tree shown in the deployed configuration, with the adjustable riser at a second height, and with a treetop portion shown in broken lines. 
         FIG. 10  illustrates an alternative front view illustrating the storage condition for the ornamental tree. 
         FIG. 11A  illustrates an example adjustable base on an underlying surface. 
         FIG. 11B  illustrates an example adjustable base in preparation for deployment. 
         FIG. 11C  illustrates an example adjustable base in a deployed configuration. 
         FIG. 12  is a flow diagram depicting a method for implementing the adjustable base to present the tree in a deployed configuration. 
         FIG. 13  is a flow diagram depicting another method for implementing the adjustable base to present the tree in a deployed configuration. 
     
    
    
     DETAILED DESCRIPTION 
     This disclosure relates to an adjustable base for an ornamental tree and to methods of using the tree and the base. The base provides ground support for the ornamental tree, and can be configured to both store the ornamental tree in a collapsed arrangement (also referred to as a storage configuration), as well as facilitate deployment of the ornamental tree for display. The base includes a riser having a distal end portion that is adapted to support a main trunk of the ornamental tree. The riser further is configured to have an adjustable axial length that can be adapted to adjust the height of the tree with respect to an underlying surface where there base rests. The adjustment of the riser&#39;s length can be performed via a pneumatic actuator, an electrical actuator (e.g., motor) or other mechanism, such as disclosed herein. 
     In some examples, the distal end of the riser can also be configured for dual uses, namely, to attach and support a lower end of the trunk to support the tree in the display configuration and to attach to and support an upper end (axially opposing the lower end) of the main trunk to support the tree in the storage configuration. This dual use of the base thus enables the base to support the tree in the storage configuration or the display configuration depending on which end of the trunk is attached to the riser. 
     Additionally, since the height of the riser is adjustable, in either the storage or display configuration, the distance between the group of tree limbs that are closest to the base and the underlying surface can be varied to space such limbs at a desired distance from the underlying surface. In the storage configuration, for example, the distance can be set by the user to provide sufficient space to accommodate limbs that have been collapsed along the trunk. In the display configuration, for example, the distance can be set by the user to make the tree taller or shorter for various purposes, such as to accommodate large presents under the tree or based on ceiling height. 
     As a further example, the base can be plugged into an exterior power source and serve as a central point of connection. For example, the base can include a receptacle for plugging in a cord for lighting or other ornamental fixtures located on the tree. As another example, a post can be attached to the base fitted with electrical connectors configured to mate with the trunk and/or limbs, through which electrical power can be distributed. In some examples, the height of the riser can be adjusted by an electrical actuator (e.g., motor) that is supplied power from the power source that also supplies electricity to the tree lights. In some examples, a motor is configured to tilt the base from a substantially vertical orientation to a substantially horizontal orientation to facilitate storage or deployment of the tree. 
     Referring to the drawings, wherein like reference numerals represent like parts throughout the various drawing figures,  FIG. 1  depicts an example of a base  50  that is adapted to support an ornamental tree, such as tree  10  of  FIGS. 8 and 9 . As disclosed herein, the ornamental tree  10  can be supported on the same base in a deployed condition or in a storage condition. The limbs can be moveable to facilitate changing between display and storage conditions. For instance, when the tree  10  is to be stored, the limbs can be moved toward a top end of the main trunk in the storage condition (see, e.g.,  FIG. 10 ) to be have an orientation that are closer to vertical than in the display condition (e.g.,  FIG. 8 ). Thus, in the storage condition the tree has a lesser width compared to the deployed condition to accommodate being stored in a smaller space (e.g., within a storage bag or other container). The limbs can be connected to the main trunk via hinged or other moveable connections adapted to support the limbs as to extend outwardly from the trunk in a generally horizontal orientation when the trunk is positioned vertically upright position in its display condition. Such pivoting allows for rotation of the limbs from the generally horizontal orientation (e.g., substantially transverse to trunk slightly angled upwardly) and a collapsed configuration (storage condition) where the limbs are oriented closer to the trunk than to perpendicular. 
     The base  50  functions as a stand for supporting tree  10  in both its storage condition and display condition. The base  50  includes a body portion  46  to house adjustment and attachment features for operation of the adjustable base  50 . As shown in the example of  FIG. 1 , body portion  46  includes a post  64  that is fixed to the base  50  and extends substantially vertically when the base is positioned on an underlying surface (e.g., the ground). An adjustable riser  70  extends axially from a proximal end of the post  64  to terminate at a distal end portion  48  of the riser. The distal end portion  48  is adapted to support a trunk of tree  10 . As disclosed herein, for example, the distal end of the riser  70  can support one of the ends of the main trunk for the tree  10  when the tree is in the deployed configuration (see, e.g.,  FIGS. 8 and 9 ) and supports another end of the main trunk when in its collapsed configuration (see, e.g.,  FIG. 10 ). For example, the ends of the main trunk can fit within a hollow portion of the riser or the riser may fit within a hollow interior of the trunk. 
     In the example of  FIG. 1 , the base  50  has a series of elements joined together to form a main portion of the base  50 . As one example, the post  64  can include a hollow core that has an opening at its distal end that can receive one of the ends of the main trunk of the tree therein for support of the tree  10 , such as may be in either a deployed configuration ( FIGS. 8 and 9 ) or in a collapsed configuration ( FIG. 10 ). In the example, the post  64  is mounted to a central arm  51 , with two outer arms  52 ,  57  on opposite ends of the central arm  51 , resulting in a substantially “H” shaped support. While the example base  50  demonstrated in  FIG. 50  is generally H-shaped, other shapes and arrangements of elements can be utilized to provide a base, such as star-shaped, X-shaped or the like. Additionally, the post  64  can be positioned near a central part of the base, such as disclosed herein or, in other examples, the post  64  could located closer to one of the edges. 
     As a further example, the base can include wheels  55  such as provided near opposite ends of an outer arm  57  of the base  50 . For instance, the wheels  55  can rotate about an axle  56  to facilitate movement of the base  50  across an underlying surface. The wheels  55  can be further used to move the tree  10  while mounted in the base  50  in either the collapsed (storage) configuration or the deployed configuration. 
     The base  50  can also include one or more pivoting feet  53  attached to outer arm  52  by use of a pintle  54 . The feet  53  help prevent the base  50  from slipping when on a flat surface such as a floor. Further, when the base  50  is tilted such that the opposite outer arm  57  is raised from the floor, the feet  53  maintain contact as to provide support and stability for the base  50 . For instance, the feet can support the base as it rotates about an axis extending through the pintles  54  to reposition the base  50  when changing the tree between its storage and display conditions (e.g.,  FIGS. 11A, 11B and 11C ). 
     In some examples, each of the feet  53  can be configured to provide more than two degrees of freedom (e.g., more than one angle of rotation), as to accommodate uneven surfaces more completely with such a pivoting feature. In the example of  FIG. 1 , the foot  53  has a somewhat triangular configuration when viewed from the side. For instance, an underlying tread contact portion of each foot  53  is relatively large to provide a fixed contact surface area to support the base  50  at ends of the outer arms opposite the wheels  55 . Locks can be provided on the wheels  55  so that the rotation of the wheels  55  can be selectively enabled and disabled, such as when it is desired that the base  50  be particularly stable. Utilization of the foot  53  can also resist sliding and horizontal movement of the base  50  in a horizontal direction. 
     As a further example, the base  50  can remain in a fixed position when both feet  53  and wheels  55  contact the ground, and can be readily moved if the base  50  is tilted slightly (typically with other portions of the tree  10  supported upon the base  50 ) and then the entire tree  10  and base  50  can be rolled upon the wheels  55  (see  FIGS. 11A-11C ). Wheels  55  are sized sufficiently large and positioned upon the axles  56  at appropriate locations so that portions of the wheels  55  extend below lowermost portions of the outer arms  52 . In this way, the wheels  55  are in contact with an underlying support surface, when the base  50  is in an upright orientation (see for instance  FIG. 8 ). The contact portion of each foot  53  can include a pliant surface material to resist sliding on the surface (e.g., rubber tread or the like). The tree  10  is thus stable when erected and oriented vertically, but can be tilted onto the wheels  55  and then readily rolled across the underlying surface from one position to another. Such rolling movement can occur when the tree  10  is in a deployed configuration ( FIGS. 8 and 9 ) or in a collapsed configuration ( FIG. 10 ). 
     The adjustable riser  70  of the base  50  can be used to adjust the height of the tree  10 . For example, the distal end portion  48  of the riser  70  can be set to a selected height (e.g., six inches to about 20 inches) demonstrated at  48 ′ and  70 ′ above the underlying surface. The height of the riser can be adjusted when the tree is mounted to the riser, either in the display condition or storage condition, or when no tree is mounted to the riser. Adjusting the height of the riser  70  allows for a user to decorate the tree  10  when in its display condition. For example, the riser can be set to a lower height to help users reach and decorate top parts of the tree and then be adjusted to an increased height for subsequent display. Additionally, the height of the riser  70  can be set to define the height of the tree for accommodating different environments (e.g., a different ceiling height in multiple rooms where the ornamental tree may be deployed). 
     The riser  70  can include one or more features configured to adjust the height of the distal end portion  48  of the riser  70  along a longitudinal axis  25  extending through the riser. The longitudinal axis  25  extends transverse to a plane extending through the ground support of the base  50 , which plane is generally parallel to the underlying surface  58  when the wheels  55  and feet  53  rest on the surface. The desired height of the riser  70  can be set along the axis  25  by a locking mechanism to ensure the riser  70  does not collapse into the post  64  when the tree  10  is mounted thereon. As an example, the riser  70  includes one or more tubes of a fixed length and a diameter dimensioned to fit within an interior hollow core of the main support post  64 . Once inserted within the hollow core, the height of the riser  70  is adjustable with respect to the post  64  and can be fixed by the locking mechanism. 
     In the example of  FIG. 1 , the locking mechanism includes a tension ring  65  that can be rotated about the central longitudinal axis  25  of the post  64  in one direction to increase tension between the post  64  and the riser  70  and thereby fix the height of the riser with respect to the post  64 . The tension ring  65  can also be rotated in the opposite direction to decrease tension between the post  64  and riser  70  to allow the user to adjust the height of the riser. Thus, as shown, riser  70  shows the distal end portion  48  of the riser at a first height from the ground, and riser  70 ′ and its distal end  48 ′, as demonstrated by dashed lines, are at a second, increased height from the ground. In other examples, the riser  70  can be a telescoping pole that can include two or more sections that may be extended by one or more associated mechanical components and locked at a desired height. 
     As another example,  FIG. 2  demonstrates the base  50  including a pneumatic mechanism  73  to adjust the height of the riser  70 . Pneumatic devices such as pneumatic cylinders, also known as air cylinders, are mechanical devices which use the power of compressed gas to produce a force in a reciprocating linear motion. Like hydraulic cylinders, a piston is forced to move in the desired direction. The piston can be a disc or cylinder, and the piston rod transfers the force it develops to the object to be moved. For example, the piston is attached to an actuatable member  59  that terminates in a handle or pedal, which can be actuated to adjust the height of the riser  70 . In some examples, the activation of the arm (e.g., a pumping action by pressing the pedal  59  in a downward fashion) can automatically build up compressed gas to incrementally increasing the height of the tree in response to the by actuation of the handle or pedal  59 . The piston can thereby incrementally move the piston upward by actuating the pedal  59  to raise the pneumatic mechanism  73 , and thus the riser (and tree) attached thereto, to a desired height. In order to lower the height of the riser  70 , a prolonged downward force applied to pedal  59  releases the buildup of compressed gas, and the pneumatic mechanism  73  can be urged to a lower position. In other examples, the activation of the handle or pedal  59  can enable a user to apply force axially along the riser to either increase or decrease the height or a riser, similar to a pneumatic chair. 
     Example pneumatic mechanisms  73  are single-acting, double-acting, and telescoping cylinders. A single-acting cylinders (SAC) uses the pressure imparted by compressed air to create a driving force in one direction (in the present case, outward from the riser), and a spring to return to the piston to the riser. A double-acting cylinder (DAC) uses the force of air to move in both extend and retract strokes. They have two ports to allow air in, one for outstroke and one for instroke. Stroke length for this design is not limited, however, the piston rod is more vulnerable to buckling and bending. Telescoping cylinders can be either single or double-acting. The telescoping cylinder incorporates a piston rod nested within a series of hollow stages of increasing diameter. Upon actuation, the piston rod and each succeeding stage “telescopes” out as a segmented piston. Thus, a telescoping cylinder allows for a longer stroke than would be achieved with a single-stage cylinder of the same collapsed (i.e., retracted) length. The type of pneumatic mechanisms  73  thus may be chose according to the desired range of heights for the adjustable base  50 . 
     In another example, the height of the riser  70  can be adjusted by a hand powered lever and crank attached to the base  50 . The lever and crank provides for communicating motion or for converting reciprocating motion into rotary motion. The crank can consist of a lever attached at right angles to a rotating shaft by which reciprocating motion is imparted to or received from the shaft. The crank is used to convert circular motion into reciprocating motion, or vice versa. The lever may be a bent portion of the shaft, or a separate arm or disk attached to it. Attached to the end of the crank by a pivot is a connecting rod. The end of the rod attached to the crank moves in a circular motion that can be turned manually about an axle. In this case, a user applies rotational force to the crank. In operation, rotating the crank turns one or more gears that are attached to a mechanism attached to the riser. This motion results in a change in the height of the riser, such that rotating the crank in a first direction will increase the height of the riser, and rotating the crank in a second direction will lower the height of the riser. When the lever is not in motion, the height of the tree can be remain fixed. For example, the lever can lock in place once the desired height is achieved. 
     As yet another example,  FIG. 3  depicts the riser  70  connected to an electric motor configured to adjust the height of the riser  70 . The electric motor can be contained within a motor housing  60  and mechanically coupled to adjust the height of the riser  70 . The motor can be activated to adjust the height of the riser  70  up or down in response to actuating a switching mechanism  61 , which controls electrical energy supplied to the motor. The switching mechanism  61  can be located on the motor housing  60  itself (as shown), embedded in a cord  63  that is connected to the motor, located in the housing  60  and activated by wireless communication through a remote control  31 , and/or other switching type. A user can provide input to the switching mechanism  61  to actuate the motor and thereby generate mechanical force to raise or lower the height of the riser  70 . 
     In some examples, the tree  10  can be permanently wired with lights. A plug  62  can be provided which is attachable to a power receptacle, such as by use of cord  63 . Another cord can extend from the plug  62  to the trunk  40 . In other examples, the electrical connection to the lights can be provided internally within the riser  70  and trunk  40  and extend to the limbs. As these cords pass the limbs  49 , the cords can be routed out the limbs  49  and terminate at various different locations with lights or other fixtures. 
     In another example, the cord can be wrapped around an exterior of the trunk  40 . The cord can be camouflaged to have a color similar to that of the trunk  40  and limbs  49  (i.e., green) to help hide the cords. In one example, the interior of each of the post  64  and riser  70  can include electrical contacts. A corresponding set of electrical contacts can be provided on the trunk  40  to mate with the electrical contacts of the post and/or riser, thereby providing electrical current to the lights and fixtures located on the tree  10 . In other examples, the electrical wiring can be disposed, at least partially within the trunks and/or branches of the tree. 
     Other controls can be provided on the motor housing  60  and/or the remote control  31 . For example, controls can actuate another motor to rotate the tree while on display. Lights associated with the tree can be turned on and off, as well as additional features such as blinking, changing colors, and changing operation in response to environmental stimuli (e.g., transitioning color as the temperature changes, blinking in rhythm with a musical score, etc.). In another example, the motor can tilt the base  50  to automatically change the orientation of the riser  70  in order to facilitate transition from a deployed condition to a storage condition or vise versa, in accordance with the systems and methods described herein. 
     Additionally, the riser  70  can be configured with one or more locking mechanisms to secure the riser  70  at a fixed axial position with respect to the post  64 . In one example illustrated in  FIG. 4 , the riser  70  can include a plurality of holes  74  extending through the riser  70  transverse to the longitudinal riser axis  25 . The holes  74  align with one or more holes  74  that extend through the post  64 . A push knob or pin  66  can be inserted through the hole  74  of the post  64  and through the hole  74  of the riser  70 , thereby fixing the height of the adjustable riser  70 . In another example illustrated in  FIG. 5 , a spring-biased pin  72  can be mounted on one of the post  64  or riser  70 , which may provide a pair of self-biased pins that extend through a pair of diametrically opposed holes  74  in the post  64 . In the example of  FIG. 5 , insertion of the riser  70  into the post  64  and alignment of the hole  74  with the biased pin  72  can result in the biased pin  72  extending through the hole  74  of the riser  70 , thereby fixing the height of the riser  70 . To adjust the height of the riser  70 , the biased pin  72  can be forced to the interior of the riser  70 , such that the biased pin  72  is no longer extending through a wall of the riser  70 . Releasing the biased pin  72  at another hole  74  can thereby enable the user to axially adjust the riser  70  to a desired height, such as shown at riser  70 ′. 
     In the example illustrated in  FIG. 6  (e.g., similar to the configuration shown in  FIG. 1 ), the tension ring  65  can be attached to the distal end of post  64 . The riser  70  can be inserted into post  64  and tension ring  65  can be mounted at the opening of post  64 . Turning the tension ring  65  along a first rotational direction will relieve tension between the post  64  and the inserted riser  70 , which allows the height of riser  70  to be adjusted from a first position to the height of riser  70 ′ at a second position increase the diameter of the post  64 . Once riser  70 ′ is in the second position, the tension ring  65  can be turned in a second direction, and creates tension (e.g., friction fit) between the post  64  and the riser  70 ′. Accordingly, the riser  70  can be set at a desired height with minimal effort. In another example, an additional tension ring and another riser can be attached to the distal end of riser  70 . The additional tension ring can be adjusted in a manner similar to tension ring  65  in order to adjust the height of the other riser. With multiple telescoping risers, a greater height can be achieved without significantly increasing the length of the post  64 . 
     In yet another example illustrated in  FIG. 7 , riser  70  includes one or more vertically oriented channels  67  extending longitudinally through the riser to enable height adjustment between two or more positions. Channel  67  cooperates with a pin or other protuberance (not shown) extending radially inwardly from an interior sidewall surface of post  64 . The pin serves as a guide by which channel  67  can guide riser  70  to a variable height. Vertical channel  67  is joined by one or more horizontal channels (e.g., extending circumferentially an arc length about the riser) to hold the riser  70  at one or more heights. For example, when the guide pin is at a top most position in channel  67 , a top channel  68  can allow the riser  70  to be turned (e.g., a quarter turn, counterclockwise) to hold riser at a lower height and thereby ensure the riser  70  does not rise unintentionally. Further, when the guide pin is at the bottom most position in channel  67 , the riser  70 , in a position represented by riser  70 ′, can be turned allowing a bottom channel  69  to slide with the guide pin. Thus, the location of the guide pin in the horizontal channel  69  can help hold the riser at its lower height and thereby ensure that the riser  70  does not fall unintentionally. Although only a pair of horizontal channels are demonstrated in the example of  FIG. 7 , the vertical channel can include more than two horizontal channels to fix the height of the riser  70  at multiple levels (e.g., two horizontal channels for two fixed heights; three horizontal channels for three fixed heights, etc.). Even as the horizontal channels  68  and  69  are shown extending in a single direction from channel  67 , one or more horizontal channels may extend in an opposite direction, or extend in two directions from channel  67 . Additionally, a securing member  75  (e.g., a screw, bolt, pin, etc.) can be used to fix the position of the riser  70  with respect to the post  64 . For example, a threaded fastener corresponding to securing member  75  can be threaded into a mating threaded aperture (e.g., tightening a screw) and engage the riser to help lock the riser at a desired height. This can ensure that handling the tree and/or base will not cause an inadvertent change in the height of the riser  70 . 
     As mentioned, the adjustable riser  70  can have a hollow core to receive a trunk of the tree  10 . Alternatively, the riser  70  and/or the post  64  can have a solid core, such that a hollow core of the trunk of the tree  10  can fit over the solid core. The main trunk  40 , as shown in  FIGS. 8 and 9 , is elongate in form extending axially from a first end  42  to a second end  44 . The ends  42 ,  44  are typically circular in cross-sectional form and have a size slightly smaller than a size of a hollow core of post  64 . The cross-section of the post  64  and/or the ends  42 ,  44  can also take a geometric shape other than circular, for example square, polygonal, triangular, etc. The ends  42 ,  44  can also be sized to fit the post  64  and/or adjustable riser  70  as shown in  FIGS. 1-7 . In this way, both the first end  42  and second end  44  can be attached to the riser  70  of the base  50 . In an example where the post and/or riser  70  include a solid protuberance, the ends  42 ,  44  can be sized slightly larger than the post  64  and/or riser  70 , to fit over the solid portion. In some examples, one of the ends  42  or  44  can fit around the hollow core of the rise and the other  44  or  42  can be configured to fit within the hollow core. 
     Limbs  49  can be pivotably attached to the main trunk  40  between the first and second ends  42  and  44 . For example, the limbs  49  pivot in such a manner that they extend approximately horizontally when the main trunk is oriented with the second end  44  positioned substantially vertically above the first end  42  ( FIGS. 8 and 9 ). The limbs  49  extend closer to vertically when the first end  42  of the main trunk  40  is positioned over the second end  44  of the main trunk  40  ( FIG. 10 ). Branches can extend from the limbs  49  and lights and other fixtures can be provided on the branches with wiring for the lights supported by the main trunk  40 , for example, a cord or electrical contacts along the main trunk  40 . 
     Branches of the tree  10  can radiate from the limbs  49  in a pattern which mimics at least some natural tree or otherwise has a desirable form. Needles can also extend from the branches and limbs. The needles can be actual natural needles such as pine needles, but can also be synthetic structures, such as attached by wire or adhesive to the branches. It is also conceivable that needles can be directly attached to the limbs. The branches can have a generally planar form such as might exist on a noble fir, or might have a more bushy cylindrical form which might be provided on many different types of pines. Needles can also be long or short depending on the design characteristics desired for the tree  10 . 
     The tree can also include a treetop  80 , which can include a treetop trunk portion that is removably attached to the second end  44  of the main trunk  40  when the tree  10  is deployed in the display condition ( FIGS. 8 and 9 ). In some example embodiments, depending on the height of the tree  10 , one or more intermediate tree portions can be axially interposed between the main trunk  40  and the tree top  80 . In the examples of  FIGS. 8 and 9 , the treetop can attach to the first end  42  of the main trunk  40  when the tree  10  has been inverted and is in its storage condition ( FIG. 10 ). A trunk locking mechanism can also be provided to hold an end of the trunk within the adjustable riser  70 . The locking mechanism can include elements similar to the connectors described with respect to  FIGS. 4-7 , or alternative or additional mechanisms suitable to secure the trunk  40  to the riser  70 . 
     With reference to  FIGS. 8-10 , the adjustability of the tree  10  will be described. In this example, the base  50  includes outer arms with wheels  55  at first ends thereof and with pivoting feet at second ends thereof opposite the first ends. With base  50 , the tree  10  can be tilted about arrow “D” ( FIG. 10 ) up onto the wheels  55  and then rolled about, in either the deployed or the collapsed condition. 
     As a further example, the main trunk  40  defines a portion of the collapsible ornamental tree  10  which supports limbs  49  and other decorative features of the tree  10 . Thus, when the main trunk  40  is inverted (in the direction of arrow “C” of  FIGS. 8 and 9 ), such that the first end  42  is positioned above the second end  44 , the branches  49  collapse vertically to provide the storage condition of the tree  10 , such as shown in  FIG. 10 . The main trunk  40  is elongate in form and rigid. The main trunk  40  can have various different heights, but it is desirable that the main trunk  40  maintain sufficiently low weight that it can be carried by an individual when grasped by the user&#39;s hand and held away from the body far enough to be inverted. 
     As one example, in the deployed condition (e.g.,  FIGS. 8 and 9 ) the first end  42  of the main trunk  40  is fit within the hollow core of the post  64 . The height of the riser  70  can be adjusted in the direction represented by arrow “A,” such as according to any of the approaches disclosed herein. For example, the adjustable riser  70  is shown in  FIG. 8  at a first height, indicated as H, whereas adjustable riser  70 ′ is shown in  FIG. 9 , raising the tree  10  to a different height indicated as H′. To convert from the deployed configuration ( FIG. 8 or 9 ) to the storage configuration ( FIG. 10 ), a user removes the main trunk  40  from the hollow core  29  of the post  64  of the base  50  and inverts the main trunk so that the first end  42  and second end  44  are swapped. 
     By way of further example,  FIGS. 11A-11C  illustrate examples of using the adjustable base  50  to convert between display and storage conditions for tree  10 . In the example of  FIG. 11A , the wheels  55  and feet  53  of the base  50  are resting on the underlying surface  58 . The feet  53  can remain fixed on the underlying surface while the opposite portion  57  of the base  50  is rotated about the axis extending through the pintles  54  in the direction demonstrated by arrow “F.” This rotation can be performed while the tree is attached to the post  64 , and the rotation can continue until the limbs of the tree  10  contact the ground (e.g., rotating an angle of about  90  degrees), such as shown in  FIG. 11B . For instance, the body or trunk of the tree  10  can be gripped by the user to rotate the tree accordingly. 
     Additionally, by employing the tension ring  65  or other means disclosed herein for adjusting the riser (see, e.g.,  FIGS. 2-5 ), the riser  70  can be raised or lowered to a desired height  70 ′. The height adjustment can be performed while the base fully rests on the underlying surface (e.g., as in  FIG. 11A ) or, in other examples, after the base has been rotated to the orientation shown in  FIG. 11B . Alternatively or additionally, the height of the riser  70  can be adjusted while the tree  10  is attached to the base  50  or when no tree is attached to the base. 
     As shown in  FIG. 11B , the base  50  can be oriented such that the riser  70 ′ is substantially parallel with the underlying surface  58 , corresponding to a reclined position. The trunk of tree  10  can be attached to the riser  70 ′ and extend from the riser in the direction of the central axis  25 . By orienting the base  50  on feet  53  with the riser  70 ′ oriented generally horizontally in its reclined position, a user need not lift the full weight of the tree  10  over the base to attach it to the riser  70 ′. Additionally, while the tree  10  is in its reclined position, a user can also attach the treetop  80  as well as any intermediate tree portions to the main trunk  40 . Thus, by positioning the base in the reclined position ( FIG. 11B ) attachment of the tree  10  to the base  50  is facilitated. 
     For example, from the reclined position, a user can disconnect the trunk from the base  50  and reattach an opposite end of the trunk to switch between storage and display configurations. That is, while the base  50  is in its reclined position (e.g., as in  FIG. 11B ), a user can easily invert the main trunk and attach the second end  44  to switch from the display condition to the storage condition. Alternatively, the user can invert the main trunk to attach the first end  42  with the riser to switch the storage condition to the display condition. Having attached the trunk  40  of tree  10  to the base  50 , the base and tree can be rotated back in the direction of arrow “G” ( FIG. 11B ) to reposition the tree  10  to its normal vertically oriented display condition, as shown in  FIG. 11C . Alternatively, if the second end  44  has been attached to the riser  70  of base  50 , the base and tree can be rotated back in the direction of arrow “G” ( FIG. 11B ) to reposition the tree  10  to its storage condition, such as shown in  FIG. 10 . The feet  53  thus provide stability and facilitate rotation from the substantially horizontal orientation ( FIG. 11B ) to the substantially vertical orientation of the tree  10  ( FIG. 10  or  FIG. 11C ). As mentioned, while the tree is erect on its base  50 , the tree assembly may be tilted onto its wheels  55  and moved to a desired position (e.g., for display or storage). 
     While the foregoing examples have been described in the context of removing and attaching an artificial tree to the base, in other examples, a real tree (live or dead) can be attached to the riser while the base is in the reclined position. For example, the riser include an opening to receive a lower trunk of a tree and can include a locking mechanism to lock the trunk with respect to the riser. A user can then rotate the base and the tree attached thereto in the direction “G” to the vertical display condition, similar to  FIG. 11C . 
     In view of the foregoing structural and functional features described above, examples method will be better appreciated with reference to  FIGS. 12 and 13 . While, for purposes of simplicity of explanation, the example methods of  FIGS. 12 and 13  are shown and described as executing serially, it is to be understood and appreciated that the present examples are not limited by the illustrated order, as some actions could in other examples occur in different orders from that shown and described herein. 
       FIG. 12  depicts a method for adjusting the height of the tree (e.g., real or artificial tree)  10 . At  300 , a ground support portion of a base unit, such as base  50  of  FIG. 1 , is placed onto an underlying surface. As described with respect to  FIG. 1 , the base unit  50  can include an adjustable riser  70  attached to and extending upwardly from the ground support to terminate in a distal end portion  48 . The distal end portion  48  of the riser  70  is configured to support an elongated trunk  40  of a tree  10  having spaced apart first and second ends  42 ,  44 . At  310 , one of the first end or the second end  42 ,  44  of the trunk  40  is connected to the distal end portion  48  of the adjustable riser  70 . This connection can be implemented according to one of the approaches disclosed herein, including  FIG. 13 , for example. At  320 , the height of the adjustable riser  70  is adjusted to adjust a height of branches and the tree  10  relative to the underlying surface where the base unit  50  is placed. As disclosed herein, the height adjustment at  320  can be implemented manually, mechanically or electromechanically assisted. 
       FIG. 13  depicts an example of method that can be implemented to configure the tree to one of its storage or display conditions. This can be part of an initial installation when no tree is currently attached to the base or when changing between display and storage conditions for the tree. At  400 , the base unit is placed onto an underlying surface. The base may contain with a tree or at least a main trunk portion mounted to the base and extending outwardly from the base. Alternatively, at  400 , the base may be without any tree portion mounted therein. 
     At  410 , the base unit  50  is positioned to its reclined position. For example, base unit  50  can be tilted up onto feet  53  of outer portion  52  of the base  50  without wheels  55 , thereby resisting rolling and orienting the adjustable riser  70  substantially horizontally (e.g., to its reclined position). At  420 , an end  42  or  44  of the tree trunk  40  of the tree  10  is mounted to the adjustable riser  70 . For example, the end  42  can be mounted to the riser when configuring the tree in its display condition. Alternatively, the end  44  can be mounted to the riser when configuring the tree in its storage condition. 
     At  430 , the base is positioned back onto the underlying surface to its display or storage condition. For example, the base  50  is tilted in the opposite direction from the tilting at  410 , such that the adjustable riser  70  is oriented substantially vertically with respect to the underlying surface. Thus, both the feet  53  and wheels  55  of the base unit  50  are in contact with the underlying surface  58 . Additionally, at any stage of the method of  FIG. 13 , the method of  FIG. 12  can be implemented to adjust the height of the riser. Moreover, the base may be titled on wheels to facilitate transport of the tree to a desired location for display or storage, as disclosed herein. 
     Various different modifications can be made to the example without departing from the scope and spirit of this disclosure. When structures are identified as to perform a function, the identification is intended to include all structures which can perform the function specified. When structures are identified as being coupled together, such language should be interpreted broadly to include the structures being coupled directly together or coupled together through intervening structures. Such coupling could be permanent or temporary and either in a rigid fashion or in a fashion which allows pivoting, sliding or other relative motion while still providing some form of attachment, unless specifically restricted. 
     What have been described above are examples. It is, of course, not possible to describe every conceivable combination of structures, components, or methods, but one of ordinary skill in the art will recognize that many further combinations and permutations are possible. Accordingly, this disclosure is intended to embrace all such alterations, modifications, and variations that fall within the scope of this application, including the appended claims. Where the disclosure or claims recite “a,” “an,” “a first,” or “another” element, or the equivalent thereof, it should be interpreted to include one or more than one such element, neither requiring nor excluding two or more such elements. As used herein, the term “includes” means includes but not limited to, and the term “including” means including but not limited to. The term “based on” means based at least in part on.