A wheel assembly having a plurality of wheel trucks spaced apart on a base plate for supporting a vehicle that uses the wheels of the wheel truck to move along a supporting surface. Each wheel truck provides two wheels sharing an independent axle in which each independent axle includes a quick release pin configured to both removably and rotatably connect the two wheels to the wheel truck.

A rotation powered vehicle drive mechanism includes an elongated chassis slot disposed within a respective lateral exterior portion of a chassis assembly. An elongated platform slot is disposed within a respective lateral portion of a platform assembly, and is configured such that it is substantially opposed to the chassis slot. The platform assembly is pivotally secured to the chassis assembly thereby allowing for rotation through a platform rotation angle of the platform assembly with respect to the chassis assembly about a rotation axis. The rotation of the platform assembly results in an increase or decrease of a variable slot height which is measured between the chassis slot and the platform slot. A cart assembly is disposed between the chassis assembly and the platform assembly, and is operatively coupled to the chassis slot and to the platform slot. The cart assembly has a cart height and is constrained by the chassis slot and the platform slot to a position on the chassis assembly wherein the cart height is substantially equivalent to the variable slot height. In this manner the cart assembly is configured to translate along the chassis assembly upon rotation of the platform assembly with respect to the chassis assembly. A helical drive shaft is rotationally secured within the chassis assembly and operatively coupled to the cart assembly such that translation of the cart assembly results in rotational motion of the helical drive shaft. A truck assembly is pivotally secured to the chassis assembly. The truck assembly includes an axle rotationally secured to the truck assembly and operatively coupled to a plurality of wheels. The axle is operatively coupled to the helical drive shaft such that rotation of the platform assembly with respect to the chassis assembly in a first angular direction results in rotation of the axle and respective wheels in the first angular direction.

A rotation powered vehicle drive mechanism includes an elongated chassis slot disposed within a respective lateral exterior portion of a chassis assembly. An elongated platform slot is disposed within a respective lateral portion of a platform assembly, and is configured such that it is substantially opposed to the chassis slot. The platform assembly is pivotally secured to the chassis assembly thereby allowing for rotation through a platform rotation angle of the platform assembly with respect to the chassis assembly about a rotation axis. The rotation of the platform assembly results in an increase or decrease of a variable slot height which is measured between the chassis slot and the platform slot. A cart assembly is disposed between the chassis assembly and the platform assembly, and is operatively coupled to the chassis slot and to the platform slot. The cart assembly has a cart height and is constrained by the chassis slot and the platform slot to a position on the chassis assembly wherein the cart height is substantially equivalent to the variable slot height. In this manner the cart assembly is configured to translate along the chassis assembly upon rotation of the platform assembly with respect to the chassis assembly. A helical drive shaft is rotationally secured within the chassis assembly and operatively coupled to the cart assembly such that translation of the cart assembly results in rotational motion of the helical drive shaft. A truck assembly is pivotally secured to the chassis assembly. The truck assembly includes an axle rotationally secured to the truck assembly and operatively coupled to a plurality of wheels. The axle is operatively coupled to the helical drive shaft such that rotation of the platform assembly with respect to the chassis assembly in a first angular direction results in rotation of the axle and respective wheels in the first angular direction.

An undercarriage of a person powered wheeled vehicle and, more particularly, to a cantilevered spring for absorbing shock and vibration is disclosed.

A wheel for a skateboard may include a bearing assembly, an annular rim coupled to and extending annularly around the bearing assembly, and a tapered tire portion coupled to and extending annularly around the annular rim. A dual wheel assembly may include a first wheel disposed on a longitudinal end portion of an axle, a spacer disposed on the longitudinal end portion of the axle adjacent to the first wheel and abutting against the first wheel, and a second wheel disposed on the longitudinal end portion of the axle adjacent to the spacer and abutting against the spacer. A method of making a dual wheel assembly may include disposing a first wheel on an axle, disposing a spacer on the axle adjacent to the first wheel, and disposing a second wheel on the axle adjacent to the spacer.

An adjustable roller skate is provided with a lower frame including a toe stop; a wheel assembly secured to the lower frame; an upper frame including a groove, a trough disposed rearward of the groove, a channel at a rear end, and a seat disposed in the trough and having a recess communicating with the channel; an adjustment mechanism including an externally threaded shaft disposed in both the channel and the recess, and a handle pivotably secured to a rear end of the externally threaded shaft and disposed externally of the upper frame; a sole including a toe cap, an internally threaded member on an underside of a rear end and threadedly secured to the externally threaded shaft, and a stem on the underside and slidably disposed in the groove; and a shoe disposed around an edge of the sole with the toe cap concealed.

An adjustable roller skate is provided with a lower frame including a toe stop; a wheel assembly secured to the lower frame; an upper frame including a groove, a trough disposed rearward of the groove, a channel at a rear end, and a seat disposed in the trough and having a recess communicating with the channel; an adjustment mechanism including an externally threaded shaft disposed in both the channel and the recess, and a handle pivotably secured to a rear end of the externally threaded shaft and disposed externally of the upper frame; a sole including a toe cap, an internally threaded member on an underside of a rear end and threadedly secured to the externally threaded shaft, and a stem on the underside and slidably disposed in the groove; and a shoe disposed around an edge of the sole with the toe cap concealed.

An inline skating shoe is provided. The shoe includes a sole on the bottom with a wheel recess. The present invention may include at least one wheel assembly within the wheel recess, such as a plurality of wheel assemblies. Each wheel assembly may include a wheel base attached to the sole, a wheel bracket pivotally attached to the wheel base, and at least one wheel rotatably secured to the wheel bracket. The wheel assemblies include a deployed position in which the wheel bracket is pivoted away from the wheel base and a retracted position in which the wheel bracket is pivoted towards the wheel base.

The present invention discloses an electric four-wheel balance vehicle includes a housing, a pedal device, a balancing device, a driving device, and a power supply device. The balancing device is provided in the housing. The pedal device includes a pedal, a fixed frame, and an elastic pad. The housing is provided with two pedal holes. The pedal is movably embedded in the pedal hole, and is limited in the housing by the fixing frame located on a top of the pedal. The elastic pad is provided between the housing and the pedal. The balancing device is provided in the housing, and is coupled with the pedal in a transmittable manner. The driving device includes a control board, two front motor-wheels, and two rear universal wheels. The balancing device is connected to the control hoard in a communicating manner.

The present invention discloses an electric four-wheel balance vehicle includes a housing, a pedal device, a balancing device, a driving device, and a power supply device. The balancing device is provided in the housing. The pedal device includes a pedal, a fixed frame, and an elastic pad. The housing is provided with two pedal holes. The pedal is movably embedded in the pedal hole, and is limited in the housing by the fixing frame located on a top of the pedal. The elastic pad is provided between the housing and the pedal. The balancing device is provided in the housing, and is coupled with the pedal in a transmittable manner. The driving device includes a control board, two front motor-wheels, and two rear universal wheels. The balancing device is connected to the control hoard in a communicating manner.