# Patent

## Title
Transformable toy vehicle

## Abstract

A toy vehicle includes a central housing having first and second oppositely disposed sides. A first wheel is rotatably mounted on the first side of the housing, and a second wheel is rotatably mounted on the second side of the housing. Each of the first and second wheels has a central hub and a plurality of individual vanes rotatably attached to the hub. Each hub has a center disposed along a first axis of rotation. Each vane is rotatable about a second vane axis extending transversely with respect to the first axis. An end of each vane distal to the hub forms a circumferential surface portion of one of the first and second wheels.

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This patent application is a continuation of U.S. application Ser. No. 11/223,132 filed Sep. 9, 2005, entitled “Transformable Toy Vehicle”, which claims priority to U.S. Provisional Patent Application Nos. 60/622,037, filed Oct. 26, 2004, and 60/642,060, filed Jan. 7, 2005, each entitled “FLIPOUT RC—Generally Spherical Transforming Toy Vehicle”, the entire disclosures of which are incorporated herein by reference.


BACKGROUND OF THE INVENTION
The present invention relates to toy vehicles, particularly those having unusual transforming characteristics.
BRIEF SUMMARY OF THE INVENTION
Briefly stated, the present invention is a toy vehicle comprising a central housing having first and second oppositely disposed sides. A first wheel is rotatably mounted on the first side of the housing, and a second wheel is rotatably mounted on the second side of the housing. Each of the first and second wheels has a central hub and a plurality of individual vanes movably attached to the hub. Each huh has a center disposed along a first axis of rotation. Each vane is repositionable about a second vane axis extending transversely with respect to the first axis. An end of each vane distal to the hub forms a circumferential surface portion of one of the first and second wheels.
In another aspect, the present invention is a transformable toy vehicle for movement on a surface. The toy vehicle comprises a housing and at least two reconfigurable wheels mounted on the housing for rotation about a common axis extending through the housing. Rotation of the wheels causes the toy vehicle to move on the surface. Each of the two wheels has at least a first configuration in which the wheel is generally shaped to receive and surround a portion of the housing adjoining the wheel and at least a second configuration different from the first configuration. Each of the two reconfigurable wheels includes a central huh centered on the common axis. The central hubs are maintained at a constant axial thickness and an unchanged distance apart along the common axis in at least the first and second configurations of the two reconfigurable wheels.



BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
The foregoing summary, as well as the following detailed description of the invention, will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there are shown in the drawings an embodiment which is presently preferred. It should be understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown.
In the drawings:
FIG. 1 is a front left perspective view of a toy vehicle, in accordance with a preferred embodiment of the present invention, having vanes in a first position and a tail in a retracted position;
FIG. 2 is a front left perspective view of the toy vehicle of FIG. 1 having the vanes in a second position and the tail in an extended position;
FIG. 3 is a front left perspective view of the toy vehicle of FIG. 2 having the vanes in an intermediate rotational position and the tail in the extended position;
FIG. 4 is a left elevational view of the toy vehicle of FIG. 2 having a first wheel and a first side of a central housing omitted to expose an on-board control unit, a battery housing, and a gear housing within the central housing;
FIG. 5 is a partially exploded view of the gear housing of FIG. 4;
FIG. 6 is a partially exploded view of the gear housing of FIG. 5 having motors and the first portion of the gear housing omitted;
FIG. 7 is an exploded view of the gear housing of FIG. 4;
FIG. 8 is an exploded view of a central shaft assembly of the gear housing of FIG. 4;
FIG. 9 is a front left perspective view of the toy vehicle of FIG. 2 having the first wheel partially exploded; and
FIG. 10 is a front left perspective view of the toy vehicle of FIG. 9 having a portion of the first wheel omitted and the remaining portion of the first wheel exploded.



DETAILED DESCRIPTION OF THE INVENTION
Certain terminology is used in the following description for convenience only and is not limiting. The words “right,” “left,” “upper,” and “lower” designate directions in the drawings to which reference is made. The terminology includes the words above specifically mentioned, derivatives thereof, and words of similar import.
Referring to the drawings in detail, wherein like numerals indicate like elements throughout, there is shown in FIGS. 1-10 a preferred embodiment of a transformable toy vehicle, indicated generally at 10, in a accordance with the present invention, in a generally spherical configuration for movement on a surface (not shown). Referring initially to FIG. 1, the toy vehicle 10 includes a central housing 12, preferably having first and second oppositely disposed sides 12a, 12b. The central housing 12 preferably also includes a front cover 12c which is engaged with the first and second sides 12a, 12b. While this is preferred, it is within the spirit and scope of the present invention that the front cover 12c be omitted, leaving only the first and second sides 12a, 12b, provided the toy vehicle 10 is still capable of functioning as described herein.
The toy vehicle 10 preferably includes at least two reconfigurable “wheels” rotatably engaged with the central housing 12. Specifically, a first “wheel” rotatably mounted on the first side 12a of the housing 12, and a second “wheel” 40 is rotatably mounted on the second side 12b of the housing 12. Rotation of the first and second “wheels” 30, 40 causes the toy vehicle 10 to move on the surface.
Referring now to FIGS. 1-3, each of the first and second “wheels” 30, 40 has a central hub 50 and a plurality of individuals vanes 20 rotatably attached to the hub 50. Preferably, each hub 50 has seven vanes 20 rotatably attached thereto, circumferentially disposed around the hub 50, although it is within the spirit and scope of the present invention that there be more or less than seven vanes 20, provided the toy vehicle 10 is still capable of functioning as described herein. Each vane 20 has a length much greater than its thickness and flares in width as it extends away from the hub 50. Each vane 20 is preferably at least slightly curved along a longitudinal axis thereof and transversely in the width direction. Each hub 50 has a center generally disposed along a first axis of rotation 50′. As will be described below, the first and second wheels 30, 40, including their respective hubs 50, are rotatable with respect to the central housing 12, such that the first and second wheels 30, 40 rotate about the first axis of rotation 50′. Each vane 20 is further rotatable about a second vane axis 20′ extending transversely and preferably generally radially from the first axis 50′.
Preferably, the vanes 20 are rotatable about the individual second axes 20′ between a first position 22 (FIG. 1) and a second position 24 (FIG. 2) rotationally different from the first position 22. Because the vanes 20 are curved, in the first position 22, the first and second wheels 30, 40 are generally cupped with open ends directed inwardly toward one another and the central housing 12, such that the central housing 12 is at least partially received in the first and second wheels 30, 40, partially covered by the vanes 20, and the toy vehicle 10 is generally spherical in shape. In the second position 24, the first and second wheels 30, 40 are generally cupped with the open ends directed outwardly away from one another and the central housing 12, thereby exposing at least a majority of the central housing 12. It is preferable that the first and second wheels 30, 40 are generally hemispherical in the first and second position 22, 24, although it is within the spirit and scope of the present invention that the first and second wheels 30, 40 have shapes other than generally hemispherical, such as semi-ovoid or conical, provided the toy vehicle is capable of functioning as described herein. Moreover, the vanes do not have to be cupped but may, instead, be essentially straight or curved in only one direction. Furthermore, the vanes can be configured and sized to fully surround the central housing 12, if desired.
It is preferred that the first and second wheels 30, 40, and specifically the vanes 20 thereof, are rotatable about 180° between the first and second positions 22, 24, and further can be oriented in at least one intermediate rotational position 26 between the first and second positions 22, 24. Preferably, the vanes 20 can be oriented at least to an intermediate position 26 rotationally halfway between the first and second positions 22, 24, such that the first and second wheels 30, 40 generally resemble paddle wheels, as shown in FIG. 3, to facilitate travel of the toy vehicle 10 on water or soft surfaces such as snow, sand, etc. While this is the preferred intermediate position 26, it is preferred that the vanes 20 be capable of being maintained in any desired rotational position between the first and second positions 22, 24, such that the first and second wheels 30, 40 essentially have an unlimited number of intermediate positions. Preferably, the vanes 20 are linked together in each wheel 30, 40 so as to rotate in unison, as will be described in more detail below.
Referring to FIGS. 2 and 4, the toy vehicle 10 further includes a tail 70 preferably movably engaged with the central housing 12. Preferably, the tail 70 has at least a first end 70d secured to the remainder of the toy vehicle 10 and an oppositely disposed, free second end 70e. It is preferred that the first end 70d of the tail 70 is pivotably attached to the central housing 12 by suitable means, such as a pin 71. The tail 70 preferably has a retracted position 72 (shown in phantom in FIG. 4) and an extended position 74. The tail 70 is preferably flexible, such that the tail 70, in the retracted position 72, is generally wrapped around the central housing 12 and, in the extended position 74, the tail 70 extends outwardly from the central housing 12 so that at least the second end 70e is spaced from the central housing 12 and beyond an imaginary cylinder having a cross-section defined by circumferential perimeters, indicated in phantom in FIGS. 3 and 4, of the two wheels 30, 40, preferably in all possible configurations of the vanes 20. Preferably, the tail 70 is formed by at least two articulated segments 70a, 70b, such that a first segment 70a is rotatably coupled to the central housing 12 and at least a second segment 70b is rotatably coupled to the first segment 70a. More specifically, it is preferable that the tail 70 is formed by at least three segments with the first segment 70a rotatably coupled to the central housing 12, the second segment 70b rotatably coupled to the first segment 70a, and a third segment 70c rotatably coupled to the second segment 70b. Although it is preferred to have an articulated tail, it is within the spirit and scope of the present invention that the tail 70 be made flexible in other ways. For example, the tail could be provided by a spring member that is partially coiled around the central housing and that resiliently reacts to uncoiling. Also, the tail need not be flexible. It may be relatively rigid and coupled with the central housing to be always extended or movably mounted to be controllably extended and retracted.
Preferably, when in the retracted position 72, the tail 70 is disposed between open ends of the first and second wheels 30, 40 with the vanes 20 in the first position 22, such that the toy vehicle 10 is generally spherical or, alternatively, generally ovular in shape. Preferably, the tail 70 includes at least one tail wheel 76 proximate the second end 70e for contacting a surface (not shown) in at least the extended position 74 of the tail 70. The tail wheel 76 is preferably rotatably coupled to the second end 70e of the tail 70 so as to roll along the surface during movement of the toy vehicle 10. Although only one tail wheel 76 is shown, it is within the spirit and scope of the present invention that there be more than one wheel or, alternatively, no wheels on the tail 70, such that the second end 70e of the tail 70 merely slides along the surface during movement of the toy vehicle 10.
If desired, the tail 70 and the vanes 20 of the first and second wheels 30, 40 can be made buoyant in water. Buoyancy of the tail and vanes 20 can be accomplished in any number of ways, including, but not limited to, forming the tail 70 and vanes 20 of generally hollow, sealed, shell-like forms and/or making the tail 70 and the vanes 20 at least partially from a plastic foam material. Although these methods of making the tail 70 and the vanes 20 buoyant are preferred, they are not meant to be limiting, as it is within the spirit and scope of the present invention for the tail 70 and the vanes 20 to be made buoyant in another manner that is generally known to one skilled in the art or to be made non-buoyant for use of the toy vehicle only on solid surfaces. By constructing the vanes 20 and the tail 70 in a manner so that the vanes 20 and tail 70 are buoyant, the toy vehicle 10 can be made capable of traveling along the surface of the water, if so desired.
Referring to FIG. 4, preferably, a gear housing 80 is disposed within the central housing 12 and includes first and second portions 80a, 80b. Preferably, the central housing 12 is also an outer housing and is decorated in some manner so as to be visually interesting to a user. For instance, the outer housing 12 can be decorated to resemble an animal, a monster, or an insect, although this is not intended to be limiting. As such, it is within the spirit and scope of the present invention that the outer housing 12 be decorated in any manner. Optionally, the outer housing 12 could be omitted and the gear housing 80 could be used as the central housing of the toy vehicle, without a separate outer housing or cover (partial outer housing) and with or without decoration.
Referring now to FIGS. 5-8, preferably, housed within the gear housing 80 are first and second drive gear trains 82, 84 and a transformation gear train 86. The first and second drive gear trains 82, 84 and the transformation gear train 86 are preferably reduction gear trains. Preferably, the first drive gear train 82 is operatively coupled to the first wheel 30. The second drive gear train 84 is operatively coupled to the second wheel 40. The transformation gear train 86 is operatively coupled with a central shaft assembly 90 that is at least partially housed within the gear housing 80. Preferably, at least a first preferably reversible motor 83 is operatively coupled to at least the first wheel 30 through the first drive gear train 82 to drive at least the first wheel 30, and at least a second preferably reversible motor 85 is operatively coupled to at least the second wheel 40 through the second drive gear train 84 to drive at least the second wheel 40. More specifically, it is preferred that pinions 83a, 85a of the first and second motors 83, 85 mesh with the first and second drive gear trains 82, 84, respectively, such that the first and second motors 83, 85 separately and independently drive the first and second wheels 30, 40. In this way, the first and second wheels 30, 40 can be driven in the same direction to move the toy vehicle 10 in either a forward or backward direction. The first and second wheels 30, 40 can also be driven in opposite directions to quickly turn the toy vehicle 10 in place about its center to either the left or the right. Alternatively, only one of the first and second wheels 30, 40 can be driven (the other of the first and second wheels 30, 40 being un-driven) so as to turn the toy vehicle 10 generally about the undriven wheel more slowly than if the first and second wheels 30, 40 are driven in opposite directions.
Referring specifically to FIGS. 5 and 7, the first and second drive gear trains 82, 84 are essentially similar. As such, only the first drive gear train 82 will be described in detail. The first motor 83 is preferably secured to the second portion 80b of the gear housing 80 such that the pinion 83a of the first motor 83 extends through the second portion 80b and through an opening 102a in an innermost first cover 102 and meshes with a first spur portion 822a of a first compound gear 822 of the first drive gear train 82. A smaller, second spur portion 822b of the first compound gear 822 meshes with a first spur portion 824a of a second compound gear 824. A second smaller spur portion 824b of the second compound gear 824 then meshes with a drive gear 96, which, as will be described in more detail below, is part of the central shaft assembly 90 and is coupled with the first wheel 30. In this way, the first motor 83 is able to power the first wheel 30 through the first drive gear train 82. In a like manner, the second motor 85 is able to power the second wheel 40 through the second drive gear train 84, in order to separately and independently drive the first and second wheels 30, 40.
It is preferred that at least one of the first and second compound gears 822, 824 of the first drive gear train include a clutch (not shown) therein in order to limit damage of the first drive gear train 82 and/or the first motor 83 should the first wheel 30 be stopped or otherwise held up during driving thereof. Preferably, the second compound gear 824 includes the clutch. While the clutch is not shown in detail, such clutches are well known in the art. Preferably, the clutch included with the second compound gear 824 is a generally circular leaf spring disposed between the separate first and second spur portions 824a, 824b, which allows rotation of the first spur portion 824a with respect to the second spur portion 824b when a certain threshold torque is reached, the threshold torque generally being the amount of torque experienced by the second compound gear 824 when the first wheel 30 is powered but unable to move.
Referring again to FIGS. 5-8, the transformation gear train 86 is preferably disposed partially within the second portion 80b of the gear housing 80 and is driven by a third preferably reversible motor 87, which is preferably engaged with the first portion of the gear housing 80. As will be described below, the transformation gear train 86 is operatively coupled to the vanes 20 of the first and second wheels 30, 40. In turn, the third motor 87 is operatively coupled to the vanes 20 in order to rotate the vanes 20 to transform the toy vehicle 10 by rotating the vanes 20 about the vane axes 20′ between at least the first and second positions 22, 24.
Referring specifically to FIGS. 5-7, a pinion 87a of the third motor 87 meshes with a first spur portion 862a of a first compound gear 862. A second, smaller spur portion 862b of the first compound gear 862 meshes with a first spur portion 864a of a second compound gear 864. A second, smaller spur portion 864b of the second compound gear 864 then meshes with a first spur portion 866a of a third compound gear 866. A second, smaller spur portion 866b of the third compound gear 866 then engages with a threaded spur gear 98 rotatably mounted on the central shaft assembly 90. The structure and operation of the threaded gear 98 will be described below.
Preferably, the transformation gear train 86 includes a slip clutch (unnumbered) on the third compound gear 866 in order to limit damage to the transformation gear train 86 and/or the third motor 87 if, during driving of the transformation gear train 86, the vanes 20 are stuck or otherwise prevented from rotating or manually forced to rotate about the second axes 20′. It is preferred that the third compound gear 866 have separate first and second spur portions 866a, 866b, with engagement surfaces (e.g., serrated surfaces, not shown) therebetween. The second spur portion 866b is preferably biased toward the first spur portion 866a by a spring (unnumbered), so that, under normal conditions, the engagement surfaces prevent slippage between the first and second spur portions 866a, 866b to enable the third motor 87 to cause rotation of the threaded gear 98. However, if the vanes 20 become bound and percent rotation of the threaded gear 98 during driving of the transformation gear train 86 by the third motor 87, the engagement surfaces between the first and second spur portion 866a, 866b slip with the second spur portion 866b being forced against the spring and away from the first spur portion 866a, thereby allowing the first spur portion 866a to continue rotating while also allowing the second spur portion 866b to not rotate. Although it is preferred that the slip clutch be included within the third compound gear 866, it is within the spirit and scope of the present invention for the slip clutch to be disposed in a different portion of the transformation gear train 86 or to be a different form of clutch. Such alternate clutches are generally well known in the art and need not be specifically described herein.
Referring now to FIG. 8, the central shaft assembly 90 preferably includes a rod 91 having caps in the form of drive gear supports 97 rotatably disposed on either end of the rod 91. The rod 91 and drive gear supports 97 are disposed partially within a threaded tube 92, such that at least ends of the drive gear supports 97 extend outwardly from either end of the threaded tube 92. The rod 91 keeps flange portions 97a abutted against annular end walls (not depicted) of the threaded tube 92. The threaded gear 98, briefly discussed above, has internal threads 98a (partially shown in phantom) within a bore thereof for threadably engaging threads 92b on the outer surface of the threaded tube 92. A collar 92a engages an end of the threaded tube 92 to retain the threaded gear 98 on the threaded tube 92 and the drive gear supports 97 and rod 91 in the threaded tube 92.
The threaded gear 98 is essentially sandwiched between innermost first and second covers 102, 104 through which the threaded tube 92 is disposed when the gear housing 80 is assembled. The innermost first and second covers 102, 104 are engaged with the first and second portions 80a, 80b, respectively, of the gear housing 80. At least the ends of the drive gear supports 97 extend through the innermost first and second covers 102, 104 so that the drive gears 96 can be slidably disposed thereon in assembly so as to abut outer surfaces of the innermost first and second covers 102, 104.
Preferably, the drive gears 96 rotate with the drive gear supports 97, while at the same time being axially slidable with respect thereto. Preferably, this is accomplished by slidably keying the drive gears 96 with the drive gear supports 97, for example, by forming the ends of the drive gear supports 97 with a hexagonal cross-section and forming the drive gears 96 with a mating hexagonal bore, thereby allowing axial sliding movement of the drive gear supports 97 with respect to the drive gears 96 while rotationally fixing the drive gears 96 with the drive gear supports 97.
Engaged with the ends of the drive gear supports 97 and extending axially outwardly therefrom are rack gears 100. The central shaft assembly 90 further includes limit switches 94, preferably engaged with each of the innermost first and second covers 102, 104, which function to cut power to the third motor 87 when sliding limits of the central shaft assembly 90 are reached.
Generally speaking, the central shaft assembly 90 allows the rack gears 100, the drive gear supports 97, the rod 91, and the threaded tube 92 and collar 92a to move axially with respect to the drive gears 96, the threaded gear 98, and the innermost first and second covers 102, 104, as well as the gear housing 80 and the central housing 12. At the same time, the central shaft assembly 90 allows the drive gears 96 and the drive gear supports 97 to rotate separately and independently of each other without affecting the above-described axial motion. This is accomplished by retaining one drive gear 96 between the first portion 80a of the gear housing 80 and the innermost first cover 102, the other drive gear 96 between the second portion 80b of the gear housing 80 and the innermost second cover 104, and, as described above, the threaded gear 98 between the innermost first and second covers 102, 104, such that each can be rotated but cannot be moved axially with respect to the gear housing 80. The threaded tube 92, however, is able to move axially along the first axis 50′ during rotation of the threaded gear 98, which causes the threads 98a of the threaded gear 98 to travel along the threads 92b of the threaded tube 92 during rotation of the threaded gear 98 by the transformation gear train 86. Because the threaded gear 98 is unable to move axially, it forces the threaded tube 92 to move axially along the first axis 50′. Doing so further causes the drive gear supports 97, the rod 91, and the rack gears 100 to move axially along the first axis 50′. However, regardless of the axial position of the above-listed components, the drive gears 96 are still capable of being rotated by the respective first and second drive gear trains 82, 84 in order to drive the first and second wheels 30, 40. In this way, the first and second wheels 30, 40 can be independently driven with the vanes 20 fixed in any vane position, e.g., any of the first, second, and intermediate positions 22, 24, 26 (as well as any other intermediate position), as well as during rotation of the vanes 20 between positions.
Referring now to FIGS. 9 and 10, a generally cylindrical collar 54 is preferably fixed to a distal end portion 96a of the drive gear 96 that extends outwardly from the first side 12a of the central housing 12 and the first portion 80a of the gear housing 80. Because the collar 54 is fixed to the drive gear 96, the collar 54 rotates with the drive gear 96. An inner portion 50b of the central hub 50 is fixed to the collar 54 and thus with the drive gear 96 so as to rotate therewith. The vanes 20 are preferably rotatably retained between the inner portion 50b and an out portion or cover portion 50a of the central hub 50 so that the first wheel 30 and its vanes 20 rotate about the first axis 50′ along with central hub 50. In this way, driving of the first wheel 30 is accomplished. Although not separately described, driving of the second wheel 40 is accomplished in a similar manner.
Referring still to FIGS. 9 and 10, disposed within the collar 54 is a series of gears including a pinion 56 engaged with and rotatable by axial sliding motion of the rack gear 100. A driving spur gear 58 is engaged with the pinion 56 so as to rotate in the same direction therewith. A driven spur gear 59 is disposed on the other side of the pinion 56. The driven spur gear 59 is not rotatably engaged with the pinion 56. Disposed within the inner portion 50b of the central hub 50 is a compound crown gear 52. The compound crown gear 52 includes a first crown portion 52a and a second crown portion 52b engaged for rotation therewith by suitable means, such as a hexagonal boss 53a on the first crown portion 52a mating with a hexagonal recess 53b in the second crown portion 52b. The first crown portion 52a is driven by the driving spur gear 58 so as to rotate about the first axis 50′ while permitting axial motion of the rack gear 100. This, in turn, causes the second crown portion 52b to also rotate about the first axis 50′. The second crown portion 52b engages with each of a plurality of vane gears 21, which are fixed to each vane 20 and also disposed within the central hub 50, captured between the outer and inner portions 50a, 50b of the central hub 50.
Preferably, each vane 20 is rotatably mounted on a post 28a (disposed along the second axis 20′) of a wheel floret 28, also captured with the hub 50, such that rotation of the second crown portion 52b causes rotation of each of the vane gears 21 and, in turn, rotation of each vane 20 about its respective post 28a. In this way, when the rack gear 100 is moved axially along the first axis 50′, each of the vanes 20 of the first wheel 30 is rotated in unison. Because the rack gear 100 associated with the second wheel 40 is also operatively coupled with the transformation gear train 86, it also slides axially along the first axis 50′ to cause the vanes 20 of the second wheel 40 to rotate in unison with each other and with the vanes 20 of the first wheel 30. In this way, the toy vehicle 10 is capable of being transformed between a generally spherical shape with the vanes 20 in the first position 22 (FIG. 1) and a transformed shape with the vanes 20 in the second position 24 (FIG. 2).
Referring to FIG. 4, the toy vehicle 10 further includes an on-board control unit 16 operatively coupled with the first, second, and third motors 83, 85, 87 and configured to receive and process control signals transmitted from a remote, preferably wireless transmission source (e.g., a conventional, manually operated controller, not shown) spaced from the toy vehicle 10 to selectively remotely control operation of the first, second, and third motors 83, 85, 87, and, consequently, selectively control rotation and reconfiguration of the first and second wheels 30, 40. The on-board control unit 16 is preferably electrically powered, as are the first, second, and the third motors 83, 85, 87. Preferably, a battery power source (not shown) disposed within a battery housing 14 supplies the electrical power needed to power the toy vehicle 10. Although it is preferred that the toy vehicle 10 be remotely controlled, it is within the spirit and scope of the present invention that the toy vehicle 10 be controlled in other ways, such as, but not limited to, programming of the toy vehicle 10 to move in a predefined manner. While first and second motors are preferred for independent wheel drive, in smaller variations of the invention, a single motor might be provided to drive both wheels simultaneously in a forward direction or in opposite directions when such motor is reserved. Similarly, while a third motor is used to axially move the central shaft assembly, the central shaft assembly might be moved in other ways, particularly in smaller versions of the invention. For example, a central shaft assembly might be moved electromagnetically between two extreme axial positions or spring biased toward one extreme axial position and driven against the bias toward an opposing extreme axial position.
In use, the toy vehicle 10 is driven on a surface by rotation of the first and/or second wheels 30, 40. The toy vehicle 10 can be transformed by causing the vanes 20 of the first and second wheels 30, 40 to rotate about the second axes 20′ between the first position 22 in which the toy vehicle 10 is generally spherical in shape and the second position 24 in which the entire central housing 12 is exposed. Further, the tail 70 is able to be positioned in the extended position 74 or wrapped partially around the central housing 14 in the retracted position 72 with rotation of the central housing 12 caused by driving of the first and second wheels 30, 40. Although this is preferred, it is within the spirit and scope of the present invention that the tail 70 be powered so that it can be caused to move to the extended position 74 and back to the retracted position 72 independently from the driving of the first and second wheels 30, 40. The vanes 20 of the toy vehicle 10 can also be configured in the intermediate position 26 (FIG. 3), so that the first and second wheels 30, 40 resemble paddle wheels, or any other rotational position between the first and second positions 22, 24. If provided with buoyant vanes 20 and tail 70, the toy vehicle 10, otherwise sealed, can then be driven on the surface of water. Although intended to be driven on water when in the intermediate position 26, the toy vehicle 10 can also be driven on dry land with the vanes 20 in any intermediate position. Moreover, it is contemplated that the toy vehicle 10 can be driven on water with the vanes 20 in either of the first and second positions 22, 24, though not as effectively.
Although the manner described above for driving and transforming the toy vehicle 10 is preferred, it is not intended to be limiting. As such, it is within the spirit and scope of the present invention that alternate methods of driving and transforming the toy vehicle 10 are also contemplated, such as, but not limited to, those disclosed in previously incorporated U.S. Provisional Patent Application Nos. 60/622,037 and 60/642,060.
It will be appreciated by those skilled in the art that changes could be made to the embodiment described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiment disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims.

## Claims

1. A toy vehicle, comprising:
a central housing having first and second oppositely disposed sides;
a first wheel rotatably mounted on the first side of the housing and a second wheel rotatably mounted on the second side of the housing, each of the first and second wheels having a central hub and a plurality of individual vanes, each of the vanes having a proximal end movably attached to the hub and each of the vanes extending from the proximal end transversely away from the hub to a distal end most distant from the hub, each hub having a center disposed along a first axis of rotation, each vane being repositionable about a second vane axis also extending transversely with the vane away from the hub and the first axis, and the distal end of each vane forming a circumferential surface portion of one of the first and second wheels.

2. The toy vehicle of claim 1, further comprising at least a first motor operatively coupled to at least the first wheel to drive at least the first wheel.

3. The toy vehicle of claim 2, further comprising at least a second motor operatively coupled to at least the second wheel to drive at least the second wheel.

4. The toy vehicle of claim 2, further comprising an on-board control unit operatively coupled with at least the first motor and configured to receive and process control signals transmitted from a remote source spaced from the toy vehicle to remotely control operation of at least the first motor.

5. The toy vehicle of claim 1, wherein the vanes of each wheel are rotatable simultaneously between a first position and a second position rotationally different from the first position.

6. The toy vehicle of claim 1, wherein the vanes are curved, such that, in a first rotational position of the vanes, the first and second wheels are generally cupped with open ends directed inwardly toward one another and, in a second rotational position of the vanes, the first and second wheels are generally cupped with the open ends directed outwardly away from one another.

7. The toy vehicle of claim 6, wherein the first and second wheels are generally hemispherical in the first and second rotational positions.

8. The toy vehicle of claim 6, wherein the vanes are movable into at least one intermediate rotated position between the first and second positions.

9. The toy vehicle of claim 1, wherein the vanes of each plurality of the first and second wheels are linked together so that the vanes of each plurality rotate in unison on each of the first wheel and the second wheel.

10. The toy vehicle of claim 1, further comprising a third motor operatively coupled to the vanes of both the first wheel and second wheel to rotate the vanes of the first wheel and the second wheel together in unison.

11. The toy vehicle of claim 1, further comprising a tail movably engaged with the housing, the tail having at least a first end and an oppositely disposed, free second end, the tail being movable between a retracted position and an extended position with respect to the central housing.

12. The toy vehicle of claim 11, wherein the first end of the tail is rotatably attached to the housing.

13. The toy vehicle of claim 12, wherein the tail is flexible.

14. The toy vehicle of claim 13, wherein the tail is formed by at least two articulated segments rotatably coupled together.

15. The toy vehicle of claim 13, wherein the tail, in the retracted position, is generally wrapped at least partially around the housing and, in the extended position, extends outwardly from the housing so that at least the second end is spaced from the housing.

16. The toy vehicle of claim 11, wherein the tail is buoyant in water.

17. The toy vehicle of claim 11, wherein the tail is made at least partially from a plastic foam material.

18. The toy vehicle of claim 1, wherein the first axis of rotation of each of the first and second wheels is a common axis of rotation of both of the first and second wheels and the second vane axis of each vane of the first and second wheels extends generally radially outwardly from the common axis of rotation.

19. The toy vehicle of claim 1, wherein the vanes are buoyant in water.

20. The toy vehicle of claim 1, wherein the vanes are made at least partially from a plastic foam material.

21. A transformable toy vehicle for movement on a surface, the toy vehicle comprising:
a housing;
at least two reconfigurable wheels mounted on the housing for rotation about a common axis extending through the housing, rotation of the wheels causing the toy vehicle to move on the surface, wherein each of the two wheels has at least a first configuration in which the wheel is generally shaped to receive and surround a portion of the housing adjoining the wheel and at least a second configuration different from the first configuration, each of the two reconfigurable wheels including a central hub centered on the common axis, each of the central hubs including an outer hub portion and an opposing inner hub portion, each outer and inner hub portion being centered on the common axis, and the central hubs and the outer and inner hub portion of each central hub being maintained at an unchanged axial distance apart from one another along the common axis in at least the first and second configurations of the two reconfigurable wheels.

22. The transformable toy vehicle of claim 21, wherein, in the second configuration, each wheel is generally cupped and has an open end generally extending outwardly from the housing.

23. The transformable toy vehicle of claim 21, wherein the central hubs of two wheels are maintained apart along the common axis the unchanged distance in all possible different configurations of the two wheels.

24. The transformable toy vehicle of claim 21, wherein the wheels have at least an intermediate third configuration in which the wheels are converted into paddle wheels to facilitate travel of the toy vehicle on water.

25. The transformable toy vehicle of claim 21, further comprising a tail having at least a first end rotatably attached to the housing and an oppositely disposed, free second end, the tail being movable between an extended position with at least the free end extending beyond an imaginary cylinder having a cross-section defined by circumferential perimeters of the two wheels in all possible configurations of the two wheels and a retracted position with the free end closer to the housing.

26. The transformable toy vehicle of claim 25, wherein the tail is flexible, such that the tail, in the retracted position, is generally wrapped around the housing and, in the extended position, extends outwardly from the housing so that at least the second end is spaced from the housing.

27. The transformable toy vehicle of claim 26, wherein the tail is formed of a plurality of articulated tail segments.

28. The transformable toy vehicle of claim 25, wherein the tail is buoyant in water.

29. The transformable toy vehicle of claim 21, wherein the wheels are buoyant in water.

30. The transformable toy vehicle of claim 21, further comprising an on-board control unit operatively coupled with the wheels and configured to receive and process control signals transmitted from a remote source spaced from the toy vehicle to remotely control at least rotation of the wheels.