Speed change operating device for a bicycle

Details Speed change operating device for a bicycle Speed change operating device for a bicycle

1984-10-29

1988-06-21

Smith, Gary L.

Machine element or mechanism

Control lever and linkage systems

Multiple controlling elements for single controlled element

74489, 74501B, 74527, 74531, G05G 1100

Patent

active

047518502

ABSTRACT:
A speed-change operating device for a bicycle includes an operating lever for actuating a derailleur, the operating lever being supported rotatably through a lever shaft to a base member attached to the bicycle frame. A friction mechanism applies to the lever an adjustable rotational resistance against a bias force of a return spring associated with the derailleur. A positioning mechanism includes a positioning member having a plurality of engaging portions for precisely setting the respective speed change stages of the derailleur and an engaging member engageable with at least one of the engaging portions. An operating mechanism selects between an operating mode and a non-operating mode of the positioning mechanism so that the positioning mechanism can be placed in a non-operating mode, when desired, with the speed-change operation being performed in such non-operating mode only with the friction mechanism resisting the return spring.

REFERENCES:
patent: 2429383 (1947-10-01), Arens
patent: 3031035 (1962-04-01), Tomita
patent: 3352173 (1967-11-01), Freeland
patent: 3662618 (1972-05-01), Kroll et al.
patent: 3915029 (1975-10-01), Shimada
patent: 4232564 (1980-11-01), Yamasaki
patent: 4343201 (1982-08-01), Shimano
patent: 4440040 (1984-04-01), Kittle et al.
patent: 4470823 (1984-09-01), Shimano
patent: 4548092 (1985-10-01), Strong, Jr.

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