Abstract: An elliptical drive system for stepper type bikes that needs no chains or sliders for its operation. Its quadrilateral linkage minimizes the vertical motion of the user's feet while guiding the feet in a natural motion that resembles walking. The elliptical drive system is designed to give the stepper bike high ground clearance for traveling on rough terrain. Adjustment apertures on the linkage arms allow the user to adjust the length of linkage arms according to the user's leg length and overall size.

Abstract: A bicycle with a rear drive assembly configured to allow pedal boards to be pivotable while moving in an elliptical trajectory and which allows a cyclist to ride in an erect position is disclosed. A front end of each of the pedal boards is pivotably connected to an end of a crank and each of the pedal boards is connected to or integral with a guide rod extending rearwardly from the pedal board. The guide rods are supported by a rear drive assembly comprising a transverse tube that is horizontally connected to a frame of the bicycle. A roller is mounted at each end of the transverse tube. Each roller has a groove which accommodates the cross-section of the guide rod.

Abstract: A suspension device for a handcycle has a first frame member and a second frame member pivotally coupled to the first frame member. A shock absorber is disposed between the first and second frame members. A lever assembly is disposed between the first and second frame members to transfer motion of the second frame member into the shock absorber. The lever assembly includes a lever pivotally coupled to the first frame member. The lever includes first and second arms coupled at an angle which allows motion of the second frame member to be directed into the shock absorber. The lever assembly is configured to transfer a vertical motion of the second frame member into non-vertical motion directed into the shock absorber. The suspension device further includes a third frame member. The first and second frame members are rotationally coupled to the third frame member.

Abstract: A wheeled vehicle includes a pair of leg driven skis and hand operated levers for simultaneously applying power to a crank and drive sprocket to propel the vehicle. A pair of controllers, one at the top of each thrust lever, include handles that are pushed and pulled to reciprocate the levers and may simultaneously be rotated through wrist and forearm action to steer the vehicle. Auxiliary steering is provided through a handlebar mounted to the vehicle separately from the thrust levers. The skis are operatively coupled to their associated levers, either directly through a pivotal connection or indirectly through an elongate link rotatably coupled at one end to the lever and at the other end to the ski.

Abstract: A mobile wheeled device driven by a user's striding his feet on a pair of footbeds through an elliptical path while applying reciprocal force to a pair of upright arm members. The device may utilize an internal gear system in the rear hub.

Abstract: This invention is a quad cycle and exercise apparatus with arm and foot power as propulsion. The rider is upstanding during operation.

Abstract: A user powered vehicle which can be propelled upon an ice surface by applying force in repetitive power stroke movements in a rowing manner. The vehicle includes a main framework (10), a forward facing seat (64), a plurality of attached ice runners (14, 16) adapted to support the vehicle for efficient forward movement upon the operating surface, a movable propulsion wheel assembly (18) including at least one propulsion wheel (38) adapted to provide forward thrust when engaged with the operating surface, a rowing assembly (74) and footrest assembly (66) operable for converting rowing motions into propulsion force, and means (86) for transfer of weight from ice runners to propulsion wheel for increased traction during rowing power strokes and for re-transfer of weight to ice runners for improved efficiency between power strokes. The vehicle is adaptable for use on snow or land by replacing ice runners with skis or wheels respectively.

Abstract: An exercise vehicle is provided with an improved push/pull cable steering system for use in directing vehicle travel without interfering significantly with vehicle power. The vehicle includes a frame with a drive system attached thereto and includes at least one drive wheel coupled with the frame. Preferably, the drive system includes arm levers operatively connected to the drive wheel so that counter-reciprocal movement of the arm levers produces rotation of the drive wheel. The steering system includes a guidance wheel rotatably coupled with the frame, an elongate steering crank which is operatively coupled with the guidance wheel, hand levers pivotally attached to the arm levers and push/pull cabling assemblies connecting the hand levers to the steering crank.

Abstract: A suspension system for a vehicle which has a wheel carrier, an upper control link having a horizontal arm, a vertical arm and a hinge portion therebetween, the hinge portion of the upper control ink being hingedly connected to a subframe of a vehicle body, front and rear lower control links for connecting a lower portion of the wheel carrier to the subframe, a trailing arm disposed in a longitudinal direction of the vehicle and mounted between the vehicle body and the wheel carrier, and a shock absorber assembly mounted between the wheel carrier and the vertical arm of the upper control link, said suspension system improving ride comfort by reducing the impact from the wheel and providing an advantage in additional space for passengers or trunk storage.

Abstract: A muscle-powered drive mechanism for vehicles or other equipment with at least one drive component, the drive movement of which is adapted to be transmitted to a drive shaft using a movement transmission system. By means of the mechanism, a user can selectively exercise a variety of muscles in the arms, legs or other parts of the body (e.g., back or abdominal regions), separately or together in many harmonious ways. For example, the system includes a set backrest drive mechanism whose drive movement is generated by a movement of a seat backrest relative to a seat surface independently of the movement of the seat surface. The system also includes a pair a freewheels mounted to a drive shaft. The movement of a mounted crank in either a forward or a rearward direction generations a single directional rotational movement of the shaft by means of one of the freewheels.

Abstract: Drive for muscle-powered vehicles and/or equipment, in particular bicycles, whereby hand-powered drive is accomplished by reciprocating rods whereas foot-powered drive is accomplished by pedals which are moved back and forth and their movement is transmitted to a cable or chain pull and, from the latter, via a freewheel system to the drive shaft, whereby steering is realized via the drive elements which are moved back and forth characterized by a) a seat drive comprising a seat (3) which may be moved back and forth on a track (3.12) extending in longitudinal direction of the bicycle, b) a seat backrest drive, in which the rocking motion of the backrest (3.1) is transformed, by means of a gear (3.4, 3.5, 3.6, 3.9), into a linear back and forth movement and which is superimposed by the drive motion resulting from the seat movement, c) a shoulder drive with a back rest (3.13) which may be swiveled around a shaft (3.

Abstract: A manual drive for a bicycle, or other usage, wherein a rotary crank is connected in driving relation with a bicycle wheel or other driven device, and a slotted block or yoke rides on a guide or pin by manual actuation, a connecting rod being connected between the yoke and crank to rotate the latter upon the yoke movement and thereby rotate the driven device.