Machine element or mechanism – Control lever and linkage systems – Multiple controlled elements
Patent
1987-07-30
1989-03-28
Smith, Gary L.
Machine element or mechanism
Control lever and linkage systems
Multiple controlled elements
74488, 74489, 74527, 74531, 7450212, 74523, G05G 900
Patent
active
048153303
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.
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Lindsey Rodney M.
Shimano Industrial Company Limited
Smith Gary L.
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