Land vehicles – Wheeled – Occupant propelled type
Patent
1988-03-29
1989-10-10
Marmor, Charles A.
Land vehicles
Wheeled
Occupant propelled type
745943, B62M 102, B62M 104
Patent
active
048726958
ABSTRACT:
A torque-multiplying kinematic device for use on a traditional rear wheel chain driven bicycle includes a pair of rods, each rod consisting of a foremost portion inclined from a rearmost portion, a pair of pivot connectors and a pair of guiding supports. Each of the rods is connected at the elbow formed by the two portions to a pedal mount on the bicycle cranks by a pivot connector. The foremost portion of each rod is holded in the end opposite the elbow to mount a bicycle pedal while the rearmost portion extends rearward to connect in a reciprocating sliding relationship with a corresponding guiding support mounted on the back fork of the bicycle, the guiding supports rotatable co-axially with the rotational axis of the wheel held between the arms of the back forth. In operation, by virtue of the inclined foremost portion of the rod on which the pedal is mounted, the cyclist can increase the useful torque to the cranks with the muscular effort remaining the same without a significant increase in the likelihood of striking the surface upon which the bicycle is ridden.
REFERENCES:
patent: 623692 (1899-05-01), Anderson
Silvano Tomba
Tomba Giuseppe
Brai Systems SRL
Marmor Charles A.
Tyson Karin
LandOfFree
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