Various embodiments for an apparatus and method for use of a footrest device with a stationary bicycle are provided. A footrest device includes a forward foundation, a rear foundation, one or more posts that extends in a horizontal direction, wherein at least one end of the one or more posts is coupled to either the forward foundation or the rear foundation. The footrest device includes a platform configured to function as a footrest, and one or more support shafts that extend in a vertical direction upwardly from the one or more posts. A method for using the footrest device includes placing one foot on a platform of the footrest device, placing a second foot on a pedal on the opposite side of the stationary bicycle, and pedaling the pedal of the stationary bicycle with the second foot while the first foot is located on the platform of the footrest device.

A transmission device is provided for bodybuilding devices or bicycles, including an axle that is operatively coupled to a sprocket assembly for collaborative operation. Two cranks are provided, having contact surfaces including one way bearing mounted thereto for fitting to two ends of the axle. Two clutch control assemblies are controllable through a wire control assembly such that the clutch control assemblies are selectively engageable with or disengageable from two cranks respectively to set the cranks in an operation mode of regular bicycle pedaling or an operation mode of one side pedaling alone or two side parallel pedaling. An important feature is that the wire control assembly is of an arrangement involving a mateable combination of two halves of which the parts are made of plastics, where assembly for centering is achieved with recess-projection engagement for better assembly accuracy.

An exercise device for performing a variety of movement patterns. The exercise device has a pair of linkages, each including an upper link pivotally mounted to a frame and a lower link pivotally coupled to an upper link. A foot support is provided on a distal end of each lower link. A transfer system is coupled to the frame and both upper links for transferring both tensile and compressive forces. Separate torque elements are operably coupled to the frame and each lower link via a transfer member for independently resisting movement of the associated lower link.

An exercise device for performing a variety of movement patterns is provided, having an upper link pivotally mounted to a lower leg link and a foot support on a distal end of the lower leg link. A first transfer system is movably coupled to a frame and including a first transfer member coupled to the first upper leg link and a second transfer member coupled to the second upper leg link, thereby enabling substantially reciprocating motion of the first leg link relative to the second leg link. A second transfer system is also provided and may be movably coupled to the frame and including a pair of third transfer members coupled to each of a pair of fourth transfer members by way of each of a pair of transfer couplings, each movably mounted to the frame. The fourth transfer members may be coupled to the first lower leg link and the second lower leg link, whereby movement of the first lower leg link causes movement of the second lower leg link irrespective of movement of the upper leg links thereby providing a stable platform for the user and also enabling an infinite number of gait patters by the user.

An exercise device for performing a variety of movement patterns is provided, having an upper link pivotally mounted to a lower leg link and a foot support on a distal end of the lower leg link. A first transfer system is movably coupled to a frame and including a first transfer member coupled to the first upper leg link and a second transfer member coupled to the second upper leg link, thereby enabling substantially reciprocating motion of the first leg link relative to the second leg link. A second transfer system is also provided and may be movably coupled to the frame and including a pair of third transfer members coupled to each of a pair of fourth transfer members by way of each of a pair of transfer couplings, each movably mounted to the frame. The fourth transfer members may be coupled to the first lower leg link and the second lower leg link, whereby movement of the first lower leg link causes movement of the second lower leg link irrespective of movement of the upper leg links thereby providing a stable platform for the user and also enabling an infinite number of gait patters by the user.

The invention discloses a ratchet-driven self-propelled scooter, comprising a scooter body and a transmission mechanism set on the scooter body; the invention provides a manpower self-propelled scooter with simple structure, light weight and low cost; step on a driving pedal to put a driving clamp in motion, thereby a pressing arm wheel drives a ratchet arm, then a ratchet pawl leads an axle to drive the rear traveling wheels to rotate, so that the scooter body moves; after releasing the driving pedal, the driving pedal is reset through a torsion spring, likewise repeatedly stepping to increase the driving force for the scooter body; the device possesses a complete scheme, simple structure, convenient operation, low cost, which is worthy of widespread promotion.

The invention discloses a ratchet-driven self-propelled scooter, comprising a scooter body and a transmission mechanism set on the scooter body; the invention provides a manpower self-propelled scooter with simple structure, light weight and low cost; step on a driving pedal to put a driving clamp in motion, thereby a pressing arm wheel drives a ratchet arm, then a ratchet pawl leads an axle to drive the rear traveling wheels to rotate, so that the scooter body moves; after releasing the driving pedal, the driving pedal is reset through a torsion spring, likewise repeatedly stepping to increase the driving force for the scooter body; the device possesses a complete scheme, simple structure, convenient operation, low cost, which is worthy of widespread promotion.

Some embodiments of the present invention disclose a bicycle propulsion system. The propulsion system includes a frame. The propulsion system includes a wheel rotably coupled to the frame. The propulsion system includes a drive wheel for rotating the wheel. The propulsion system has a pedal. The propulsion system includes a crank lever having a proximate end coupled to the frame and a distal end coupled to the pedal. The propulsion system includes a cam rotably coupled to the crank lever between the distal and proximate ends, wherein the cam comprises a pair of connecting members that when connected form a shaft positioned away from a center of the cam. The propulsion system includes a drive lever having a proximate end comprising a cam follower interfaced to the cam and a distal end coupled to the drive wheel.

Some embodiments of the present invention disclose a bicycle propulsion system. The propulsion system includes a frame. The propulsion system includes a wheel rotably coupled to the frame. The propulsion system includes a drive wheel for rotating the wheel. The propulsion system has a pedal. The propulsion system includes a crank lever having a proximate end coupled to the frame and a distal end coupled to the pedal. The propulsion system includes a cam rotably coupled to the crank lever between the distal and proximate ends, wherein the cam comprises a pair of connecting members that when connected form a shaft positioned away from a center of the cam. The propulsion system includes a drive lever having a proximate end comprising a cam follower interfaced to the cam and a distal end coupled to the drive wheel.

A combination driving hub and transmission for a cyclesuch as a bicycle. The inventive hub is preferably installed on the rear of a bicycle. A pair of reciprocating cranks provide input torque to corresponding input shafts. These input shaft transmit the torque through a series of step-up shafts. The step-up shafts increase the speed of the initial inputfinally delivering the torque to an output shaft. The output shaft is preferably the hub of the bicycle's rear wheel.