Bicycle equipped with a chainset/crank-arm system
OwnerPavel-Tivadar Sakirovinventor
Life of this patent
Estimating the term…
Abstract
A device for assembling a bicycle equipped with a pedal crank system to improve the mechanics of the kinetic energy put in by the rider by simplifying the movement of the rider's feet into a reciprocating up and down movement. It consists of right and left cranksets (1D, 1G) pivoting about the axis (Ex) of the shafts (2), a chainset which includes a rack (3) that propels the ring gear (4) and the set of ring gears and chains (5, 6) by transforming the play forces through a rear changer (7) and moves forward the rear wheel via its hub receiving the propelling force of the play of the hubs of the cassettes (8) integrated in the hub of the wheel (9), or external with a system of one-way freewheel (8), fixed on the rear fork (12) by the rotating pin (Ax) also maintaining the wheel fastener (25).
Claims5
A transmission system for a cycle comprising:
- a front frame that includes a frame head;
- a rear fork mounted on the frame head;
- a rear-frame top tube fixed onto the frame head and including a first axis Cx, transverse to the rear-frame top tube;
- one or more chainrings mounted to rotate on the first axis Cx transverse to the rear-frame top tube;
- two shafts, each having one end mounted on one end of the rear-frame top tube;
- pedal crank arms articulated at the other ends of the shafts that are not mounted to the rear-frame top tube;
- a chain intended to transmit power between a chainring and a cog cassette mounted on a rear wheel;
- and
- a coupling device between the pedal crank arms and the first axis Cx, transverse to the rear-frame top tube, to convert an alternating movement of the pedal crank arms into a rotational movement of the chainring transmitted to the rear wheel by means of the chain and the cog cassette.
Dependencies are inferred from the claim text.