Transmission

Details Transmission Transmission

1988-11-21

1990-09-11

Wright, Dirk

Machine element or mechanism

Gearing

Interchangeably locked

192 6R, 280260, 280238, F16H 322

Patent

active

049552473

ABSTRACT:
A multi-speed transmission has particular usefulness in bicycles, completely eliminating the use of the commonly used derailleur and the exposed flexible cable and the readjustment problems inherent with that prior structure. The transmission includes separate concentric gear rings which to a certain extent operate independently of each other. A shift mechanism for shifting the transmission is such the transmission can not be shifted from one gear to a non-adjacent gear without stopping at a gear therebetween. That is, no gear can be skipped. This is accomplished by a particular relationship of a pawl, a pusher, a shift segment plate and barrels mounted on the shift segment plate, among other parts.

REFERENCES:
patent: 536550 (1895-03-01), Snyder
patent: 592726 (1897-10-01), Edge
patent: 913623 (1909-02-01), Dallison
patent: 928894 (1909-07-01), Barnes
patent: 968495 (1910-08-01), Probst
patent: 1069004 (1913-07-01), Haines
patent: 1581954 (1926-04-01), James
patent: 1739505 (1929-12-01), Cunningham
patent: 2033850 (1936-03-01), Roberts, Jr.
patent: 2378634 (1945-06-01), Hussey
patent: 3863503 (1975-02-01), Loeb et al.
patent: 3892301 (1975-07-01), Frei et al.
patent: 4182194 (1980-01-01), Tomozawa
patent: 4447068 (1984-05-01), Brooks

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