Land vehicles – Wheeled – Occupant propelled type
Patent
1987-07-22
1989-06-27
Marmor, Charles A.
Land vehicles
Wheeled
Occupant propelled type
280261, 74750B, 74781B, B62M 906
Patent
active
048422916
ABSTRACT:
An enclosed drive for a low maintenance bicycle features a chain case which replaces the conventional chain stay on the right side of the bicycle, and an improved nine speed planetary transmission housed within a gear case inside the rear wheel hub. The chain case is press fit on a steel tube rotatably mounted in the bottom bracket, and the rear spindle is clamped in the rear dropouts with over center quick disconnects. To change the rear tire, the rear spindle is released and the chain case is rotated about the axis of the bottom bracket to swing the rear wheel clear of the frame. The wheel, which is attached to the gear case with four bolts, can then be removed from the left side without disturbing or exposing any of the drive train components.
REFERENCES:
patent: 626875 (1899-06-01), Smith
patent: 2169171 (1939-08-01), Torres
patent: 3433097 (1969-03-01), Fox
patent: 3908807 (1975-09-01), Ozaki
patent: 3934493 (1976-01-01), Hillyer
patent: 3955444 (1976-05-01), Munn
patent: 4651590 (1987-03-01), Thun
patent: 4706982 (1987-11-01), Hartmann
patent: 4721015 (1988-01-01), Hartmann
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