A bicycle with alternating-motion pedals the movement of which is converted by particular chain means into a rotating motion which is applied to the driving wheel of the bicycle.

An arrangement for producing or showing distance lapse motion pictures in coordination with a bicycle through mechanical or electrical system operated in accordance with the speed at which the bicycle or exercise bicycle by a user thereof.

An oscillating pedal bicycle in which the downward force exerted by a rider is converted from the oscillating-motion of the pedals into a unidirectional rotation of the drive wheel. The oscillating motion of the pedals is transmitted by flexible tension members to a conversion mechanism for converting the linear motion of such tension members into the rotary motion of the drive wheel. Maximum utilization of the motive power of the rider is achieved through the use of a quick-release, variable po...

A bicycle in which the frame is so constructed that the pedal crank is displaced forwardly of the center of the back wheel by a distance equal to at least twice the radius of the back wheel, and the rear frame member has a length equal to at least twice the radius of the back wheel, and the steering column housing is slanted at an angle of between 62.degree. and 58.degree. to the horizontal, and the saddle support column has a length equal to between 1.2 and 1.4 times the radius of the back whee...

The invention relates to a bicycle adjusting device, in particular an adjusting device for adjusting the height of the front wheel suspension, the rear wheel suspension, the saddle or of the steering mechanism of a bicycle, e.g. of a mountain bike, a bicycle with at least one bicycle adjustment device, as well as a bicycle-steering head bearing system, whereby the adjustment has at least one double-acting piston-cylinder assembly with a first cylinder space (14a, 34a) and a second cylinder space...

The invention relates to a bicycle adjusting device, in particular an adjusting device for adjusting the height of the front wheel suspension, the rear wheel suspension, the saddle or of the steering mechanism of a bicycle, e.g. of a mountain bike, a bicycle with at least one bicycle adjustment device, as well as a bicycle-steering head bearing system, whereby the adjustment has at least one double-acting piston-cylinder assembly with a first cylinder space (14a, 34a) and a second cylinder space...

A bicycle comprising a frame including a pair of substantially identical side frames which are mirror images of one another. Each side frame comprises a single length of tubular material of substantially constant cross section throughout with the ends of the single length providing vertically spaced free ends. A seat mast having a crank housing tube connected to the lower end thereof has its upper end joined to the pair of frames. A fork mounting tube of substantially constant diameter is provid...

A bicycle handlebar stem is made of two separate parts, a tubular shank and a gooseneck. This eliminates or substantially reduces long drilling operation for the stem and it simplifies the forging of the gooseneck. The gooseneck is shaped for forging thereof in a manner such that the meeting of the forging dies does not occur across the top of the stem, and the forging operation can forge identifying insignia on the stem top and/or form a recess of receiving an identification plate. Destruction ...

A bicycle having its saddle support inclusive of a saddle and a crank means elastically suspended from an upper frame independently of its upper and its lower frame in which front and rear wheels are journalled so as to prevent transmission of vertical motion therefrom to the saddle support and also so as to protect, in conjunction with the saddle support, the handle itself against the vertical motion of the wheels.

A bicycle of the type comprising a frame and a front and rear wheel rotatably mounted to the frame is provided with improved means for rotatably driving the rear wheel. The driving means comprises a right and left foot lever pivotally connected at one end to the frame and adapted to be alternately depressed by the feet of the bicyclist. Each foot lever is coupled by a link to a pivot rod pivotally connected to the frame so that the alternate depression of the foot levers rotates the pivot rod be...