Chainless motocross bicycle

Details Chainless motocross bicycle Chainless motocross bicycle

1989-10-10

1991-01-22

Marmor, Charles A.

Land vehicles

Wheeled

Occupant propelled type

745942, 475293, B62M 108, F16H 128

Patent

active

049865560

ABSTRACT:
A chainless motocross bicycle features a bicycle frame with no bottom bracket or seat post, a pedal drive shaft located on the axis of the rear wheel, and a single speed planetary transmission located inside the rear wheel hub. The transmission includes a ring gear with an integral extension of the ring gear clamped in the bicycle frame dropout on the right side; multiple planet gears rotatably mounted on a planet gear carrier driven by the pedal drive shaft, with each planet gear in constant mesh with the ring gear and with a sun gear rotatably mounted on the pedal drive shaft; and a conventional one way clutch coupling the sun gear with the wheel hub. The compact nature, low maintenance, and simplicity of this arrangement provides an attractive alternative to chain driven motocross bicycles which are conventionally ridden with the rider standing on the pedals.

REFERENCES:
patent: 2505464 (1950-04-01), Debuit
patent: 4694708 (1987-09-01), Hartmann
patent: 4706982 (1987-11-01), Hartmann
patent: 4715246 (1987-12-01), Hartmann
patent: 4721015 (1988-01-01), Hartmann

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