An elliptical bike is described having a function that elliptical bikes of the related art do not have, since their rear pulleys, which support the platforms, are screwed into protrusions welded to the frame, which have holes. The bicycle also comprises a folding embodiment, and holes that are suitable for raising and lowering the angle of attack of the platforms and the positioning of the rear pulleys, which are fixed (e.g., screwed) into protrusions welded to the frame, thereby providing four positions of angle of attack, giving the option to work different muscles in the user’s legs.

A pivoting crank arm apparatus that increases the user's torque. The pivoting of the crank arms further allows the user to quickly move the pedals out of the dead zones at the top dead center and bottom dead center of the crank cycle. This prevents the user from stalling in these dead zones while climbing hills and other high torque or slow pedal speed situations. The pivoting crank arm apparatus is comprised of a set of crank arms attached by a spindle. Each crank arm is further comprised of a pivot arm with a pedal. The pivot arm being pivotally attached to the crank arm and configured to allow for the pivoting action of the present invention.

A stride emulator device for efficiently utilizing human leg power for transference to a rotary drive system including a pair of levers, at least two gears, at least two crankshafts having crank arms, and where each lever includes a cam and cam track.

Vehicular transmission systems includes a frame, a wheel drive sprocket associated with a wheel, a main drive sprocket mounted on the frame, a transmission member rotationally coupling the drive sprockets, a pedal slider coupled to the frame and which swings forward and rearward, and a drive mechanism including an overrunning clutch system connected to the main drive sprocket. A power link is connected at a first end region to the pedal slider and at a second end region to the clutch system. Forward movement of the pedal slider causes movement of the power link and rotation of the clutch system which causes rotation of the main drive sprocket and the wheel drive sprocket resulting in rotation of the wheel. The clutch system includes a drum over which the power link passes, and which has a circular portion and a fin extending radially outward therefrom.

Vehicular transmission systems includes a frame, a wheel drive sprocket associated with a wheel, a main drive sprocket mounted on the frame, a transmission member rotationally coupling the drive sprockets, a pedal slider coupled to the frame and which swings forward and rearward, and a drive mechanism including an overrunning clutch system connected to the main drive sprocket. A power link is connected at a first end region to the pedal slider and at a second end region to the clutch system. Forward movement of the pedal slider causes movement of the power link and rotation of the clutch system which causes rotation of the main drive sprocket and the wheel drive sprocket resulting in rotation of the wheel. The clutch system includes a drum over which the power link passes, and which has a circular portion and a fin extending radially outward therefrom.

A drive system comprises a frame, a first extension member, a second extension member, a crank shaft, a hub, a bearing, a cross shaft, a first arm assembly, a second arm assembly, a first chain assembly, a second chain assembly, a first rotatable pedal, a second rotatable pedal, and a steering column. The first arm assembly comprises a first frame arm, a first connecting arm, a first main arm, and a first crank arm. The second arm assembly comprises a second frame arm, a second connecting arm, a second main arm, and a second crank arm. The first arm assembly further comprises a first roller track assembly. The second arm assembly further comprises a second roller track assembly.

The function of this invention is to provide exercisers with a safe and easy way to convert a legs-only exercising device, such as a stationary trainer or bicycle, with the capacity to exercise their upper and lower body muscle groups simultaneously or separately. This invention is portable and can be moved easily from one legs-only exercising device to another. Once they are mounted onto the handlebar or attachment bar of the legs-only device, it is now a full-body trainer. Exercisers mount the trainer, place their feet on the cycling pedals, place their elbows onto the elbow holders, grasp the hand grips, and now start their full body exercising activity. The degree of difficulty of their exercise trek is easily accommodated by allowing the rider to adjust the resistance for moving the forearm bars up and down for an upright bike, or back and forth for a recumbent trainer.

The function of this invention is to provide exercisers with a safe and easy way to convert a legs-only exercising device, such as a stationary trainer or bicycle, with the capacity to exercise their upper and lower body muscle groups simultaneously or separately. This invention is portable and can be moved easily from one legs-only exercising device to another. Once they are mounted onto the handlebar or attachment bar of the legs-only device, it is now a full-body trainer. Exercisers mount the trainer, place their feet on the cycling pedals, place their elbows onto the elbow holders, grasp the hand grips, and now start their full body exercising activity. The degree of difficulty of their exercise trek is easily accommodated by allowing the rider to adjust the resistance for moving the forearm bars up and down for an upright bike, or back and forth for a recumbent trainer.

A modular exercise apparatus comprising a frame, a common drivetrain supported by the frame and including a common axle, a plurality of input receivers coupled to the common axle, and a resistance member operably coupled to the common axle and operable to provide resistance against rotation of the common axle, a first exercise attachment including a first drive member operably coupled to a first input receiver of the plurality of input receivers of the common drivetrain, and a second exercise attachment including a second drive member operably coupled to a second input receiver of the plurality of input receivers of the common drivetrain.

A modular exercise apparatus comprising a frame, a common drivetrain supported by the frame and including a common axle, a plurality of input receivers coupled to the common axle, and a resistance member operably coupled to the common axle and operable to provide resistance against rotation of the common axle, a first exercise attachment including a first drive member operably coupled to a first input receiver of the plurality of input receivers of the common drivetrain, and a second exercise attachment including a second drive member operably coupled to a second input receiver of the plurality of input receivers of the common drivetrain.