Abstract: Disclosed herein is a bicycle comprising a frame, a pair of wheels supporting the frame, a sprocket fixed to one of the wheels, a drive member rotatably carried by the frame, a pair of pedals connected to the drive member, a plurality of links carried by the drive member for common rotation therewith and for pivotal movement relative thereto, a driven member, an inner guide ring, an arm supporting the inner guide ring on the frame for transverse movement relative to the rotary axis of the drive member, surfaces on each of the outer ends of the links and on the driven member and on the inner ring for mounting the driven member for common movement with the inner ring and for rotation relative thereto and for effecting rotation of the driven member in response to rotation of the drive member, a cylinder-piston arrangement on the frame for displacing the inner ring relative to the rotary axis of the drive member to vary the rate of rotation of the driven member relative to the drive member, and an endless member

Abstract: A drive system for providing propulsion forces having predetermined characteristics for a bicycle or the like having a rear wheel manually operable by application of rider generated input forces through pedals mounted on crank arms operatively connected to a crank shaft with cam means operable by the crank shaft and the crank arms, the cam means being designed to variously modify the available input and/or effective output force characteristics in accordance with predetermined desired characteristics and being operatively connected to and driving an oscillator means with bike speed change means associated therewith to provide a substantially infinitely variable selectable range of bike speeds, and rear wheel driving means operatively connected to and driven by the oscillator means and operatively connected to and driving the rear wheel of the bike with bike speed ratio changing means associated therewith to provide for selective multiplication of the ratio of application of available bike speeds in the substa

Abstract: A variable speed bicycle including a variable speed pulley assembly connected between the bicycle pedal assembly and the bicycle rear axle, the movable pulley halves of the variable speed pulley assembly being actuated by cables, each cable having one end operatively connected to a respective movable pulley half and the opposite end connected to a winding drum mounted on the bicycle frame.

Abstract: This invention, which provides a folding bicycle, comprises a foldable frame structure including a front support assembly having handlebars and arranged to be rearwardly foldable. According to the invention, the user can very quickly and easily fold the bicycle by manually rearwardly folding the front support assembly which includes upper and lower sections interconnected by a hinge.

Abstract: A bicycle belt drive system is provided which employs a toothed endless power transmission belt made primarily of polymeric material wherein the teeth of such belt are employed during starting of the bicycle to provide a more positive interconnection between driving and driven pulleys of the drive system and at least one of the pulleys has means for changing the mechanical advantage between the driving pulley and the driven pulley in response to rotational speed changes in the one pulley and thus in the bicycle speed.

Abstract: A four wheel, pedal driven vehicle particularly adapted for two persons seated in tandem, wherein each person alone or together can operate the vehicle by pedaling and steering. The vehicle comprises a unitary frame, a front spindle yoke assembly in combination with front handle bars and with front wheel forks of each front wheel, a steering control system in combination with the yoke assembly and rear handle bar means, a continuous drive chain assembly which is in combination with sprockets and pedals of both operator positions and which is in combination with transmission means and a rear drive assembly, whereby the drive chain can be driven from either tandem position. The vehicle has an associated body shell and cowls as well as conventional brakes, lights, etc.

Abstract: A bicycle having front and rear wheel caliper brakes each being connected by a cable to a linkage including a swingable cam element which is normally disposed in the path of travel of a cooperating cam member mounted for movement concentrically about the pedal axle whereby the cam element through its swingability is removed from such path during forward pedaling action and is lockingly engageable with such cam member upon back pedaling action. In the latter condition force is applied to the linkage for effecting a pull upon the cables to effect braking operation. The cam members are so related to the pedal cranks that when engagement with the cam element is effected one pedal crank will be downwardly directed whereby a support stand carried upon the associated pedal may cause such pedal to swing to present the support stand for engagement with the support surface.

Abstract: A foot propelled two-wheel-in-line vehicle having a two-wheel friction drive including a front drive epicyclic contra-rotating element, pedalled driving wheels, a pedal actuated rear wheel brake, and an automatic variable-speed transmission comprising a centrally disposed rotor in friction-tight contact with a plurality of pulley wheels normal thereto and radially traversing thereon, said wheels flexibly connected with mating wheels and with said epicyclic element in such manner as to impart torque to the perimeter of the cycle wheels.

Abstract: A drive assembly for a physically propelled vehicle such as a bicycle having a crank arm operatively connected to a drive member for rotating the drive member, and a power arm rotatively mounted for relative angular movement between the power arm and crank arm. A control mechanism interconnects the power arm and the crank arm for rotating the crank arm and drive member, and for accelerating the power arm ahead of the crank arm during one portion of the crank arm cycle and decelerating the power arm behind the crank arm during another portion of the crank arm cycle. More particularly, the control mechanism includes a cam surface provided on either the crank arm or power arm, and a cam element having a shaft rotatively mounted on the other of the arms and having a spaced cam follower engaging the cam surface.

Abstract: The derailleur is mounted inboard as respects the bicycle frame. It is aligned with the rear drive sprockets. The take-up cage carrying sprocket wheels over which the slack part of the chain passes is carried on an actuating rod or stem, which engages a positioning means which provides for positive transfer of the chain from one drive sprocket to another, and for positive alignment of the take-up means and drive chain with individual drive sprockets. The positioning means is in the form of overlying plates, having overlying slots configurated to positively guide the stem carrying the take-up cage to assure the positive transfer of the drive chain, and positive alignment with individual drive sprockets.

Abstract: A bicycle having front and rear wheel caliper brake assemblies which are connected to a swingably mounted lever which in one form of the invention is operatively engaged to the pedal shaft through friction-producing elements as well as to cables controlling the brake assemblies so that upon back pedaling action the brakes will be automatically applied; but with there being a linkage connection between said lever and a pawl engageable with a driven sprocket on the rear axle to promote slackness in the transmission chain upon brake application. In another form of the invention, the particular lever member is operatively engageable with the pedal shaft by bearing elements carried thereon and to a front pawl lockable with a drive sprocket; and there being an elongated finger-like element fixed to the lever and engageable with the transmission chain for assuring of slackness therein upon release of the said front pawl.

Abstract: An agricultural traction unit using a motor and transmission with two outputs to drive the front wheels and the rear wheel using chain and sprockets to transmit the power, having room for several passengers, a running board to rest the user's feet, and a storage platform with a rail.

Abstract: A conventional bicycle of the type having a frame with an upper bar between an upright seat-supporting member and a steering fork bearing assembly is converted to a high-ride bicycle by a bifurcated seat extension having a housing for a pedal sprocket bearing assembly on the end of one branch which extends forwardly along the upper bar. Clamping means secures the forwardly extending branch to the upper bar. A downwardly extending branch is clamped in the bicycle frame in the place of the seat, and the seat is clamped in place at the upper end of the seat extension.

Abstract: An occupant propelled, tricycle type, recreational vehicle has an inflated flexible bag attached to its outer periphery to provide safe, controlled bumping of similar vehicles or other objects for the amusement of the occupant.