Abstract: A transmission structure for a bicycle includes two opposite transmission units. Each of the transmission units includes a linear reciprocating pedaling mechanism, a transmission module which is in transmission connection with the linear reciprocating pedaling mechanism, and a resetting module connected with the transmission module. The transmission modules of the two transmission units are connected with a power output mechanism through a unidirectional transmission mechanism. The transmission module includes a first driven wheel and a first transmission gear configured to be coaxial with the first driven wheel. The resetting module includes a connecting piece and an elastic piece. The connecting piece is connected with the first transmission gear. The elastic piece is connected with the connecting piece.

Abstract: A leg and arm powered vehicle incorporating a frame; a seat rollably mounted upon the frame for reciprocating motion; a wheel and propulsion sprocket combination mounted upon the frame for vehicle propulsions; a chain operatively engaging the propulsion sprocket, the chain having a pair of flights; a sprocket support member fixedly attached to the seat; rearward and forward drive sprockets, the rearward drive sprocket engaging one of the chain's flights; first rotatable mountable means attaching the rearward drive sprocket to the sprocket support member and being adapted for alternatively resisting counter-rotation of the rearward drive sprocket and permitting rotation of the rearward drive sprocket; second rotatable mounting means attaching the forward drive sprocket to the sprocket support member and being adapted for alternatively resisting counter-rotation of the forward drive sprocket and permitting rotation of the forward drive sprocket; and hand and foot engaging members fixedly mounted to the frame.

Abstract: A transmission unit for a vehicle driven by muscle power. The transmission unit has one through shaft and one output shaft, as well as at least two sub-transmissions and at least one intermediate shaft. In the transmission unit at least one of the intermediate shafts and the output shaft is formed as a hollow shaft which is arranged coaxially to another shaft of the transmission unit.

Abstract: An exercise cycle includes a base frame having front and rear wheels and a seat slidably mounted thereon. A pair of pivotal foot pedals operate a steering mechanism to turn the front wheels toward the left or right. Between the foot pedals is a vertical support bar having a drive pawl at an upper end with a cable spirally wrapped thereabout. A handle affixed to the distal end of the cable is accessible by a rider resting in the seat. A drive chain encompasses a gear on a side of the pawl and a similar gear on the rear wheel axle. Accordingly, a rider sits on the seat, grasps the handle and places the feet on the foot pedals. By pushing with the legs and simultaneously pulling the cable, the rider propels the cycle while simulating the workout typically provided by a rowing machine.

Abstract: An improved human-powered engine which is actuated by forward and rearward movement of the body to cause extension of a resilient member which serves to provide driving motion to a wheel, propeller or the like.

Abstract: This device is exercise equipment. It is a vehicle that is driven by arm and leg power. The device is a three wheeled vehicle that driven by the movement of the handlebars and the seat. The rider moves the handlebars and the seat back and forth. The handlebars are attached to the wheels by a set of pulleys. When the handlebars are moved back and forth they drive the wheels. The handle bars and the seat are attached to each other so that both the legs and the arm are exercised. Thus, an individual can ride around the town in his vehicle exercising his whole body.

Abstract: A bicycle which can be driven either by conventional rotation of the pedals, or by reciprocating movement of the saddle on the seat post. The cycle includes two frame portions: a first fixed frame portion including an upright member extending from a drive wheel axle bearing, and a second movable frame portion including the seat post which has bifurcated arms driving transmission levers for turning the drive wheel.

Abstract: A power generating apparatus for a bicycle, in particular, a racer type bicycle such as a road racer and a mountain bike, is disclosed. The power generating apparatus of the present invention composed of a power generating unit and a mount stay having suitable means for mounting the power generating unit on a bicycle. In this power generating unit, a rotor is integrated with a cylindrical circumference portion of a housing of the power generating unit. The mount stay is fitted on a front portion of a frame of a bicycle with a bolt. On this mount stay, the power generating unit is detachably mounted so that the rotor may rotate by the tire of the bicycle in contact with the cylindrical circumference portion of the rotor.

Abstract: Additional propelling power for a bicycle is provided by mounting the bicycle seat to reciprocate in an up and down direction and converting this motion into rotary motion by a ratchet gear. Rotation of this ratchet gear takes place when the seat moves down under the weight of the bicycle rider, a compression spring returning the seat to its up position when the rider lifts his weight from the seat. The motion of the ratchet gear is imparted to the rear wheel of the bicycle through a gear train which amplifies the rotary motion and further which may be provided with a gear shift mechanism for varying the number of rear wheel rotations imparted for one down stroke of the bicycle seat. The auxiliary seat drive is provided in addition to the conventional pedal drive sprocket and chain arrangement normally provided on bicycles.