Front gear for bicycle with chain restoring device

Details Front gear for bicycle with chain restoring device Front gear for bicycle with chain restoring device

1992-04-30

1993-12-28

Britts, Ramon S.

Endless belt power transmission systems or components

Guard or housing for belt or pulley

474160, 474273, 74609, F16H 5530

Patent

active

052734951

ABSTRACT:
A multistage front gear apparatus for a bicycle having a device for restoring a chain having fallen off which includes a shelf portion (51) extending axially of the rotary shaft, a chain engaging portion (52) extending from a free end region of the shelf portion radially outwardly of the rotary shaft, and a guide portion (53) disposed peripherally of the shelf portion for guiding the chain away from the chain engaging portion. The chain engaging portion (52) has opposite edges in a rotating direction extending substantially at right angles to the shelf portion. The guide portion (53) is formed on peripheral side surfaces of the shelf portion, and includes inclined guide surfaces extending from positions of connection to the chainwheel to peripheral regions of the shelf portion.

REFERENCES:
patent: 4111063 (1978-09-01), Journey
patent: 4198876 (1980-04-01), Nagano
patent: 4384865 (1983-05-01), Ueno
patent: 4439172 (1984-03-01), Segawa
patent: 4580997 (1986-04-01), Browning et al.
patent: 4598608 (1986-07-01), Ueno
patent: 4960402 (1990-10-01), Klein et al.
patent: 5002520 (1991-03-01), Greenlaw

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