Machine element or mechanism – Control lever and linkage systems – Hand operated
Reexamination Certificate
2006-04-25
2006-04-25
Charles, Marcus (Department: 3682)
Machine element or mechanism
Control lever and linkage systems
Hand operated
C074S504000, C074S473110, C074S486000, C474S080000
Reexamination Certificate
active
07032475
ABSTRACT:
A hydraulic shift gear mechanism for a bicycle having a positioning mechanism for controlling the motion of the piston of a master cylinder assembly is described. The master cylinder assembly is in communication with a slave cylinder for operation of a derailleur. The positioning mechanism preferably includes a pivot shaft spaced apart from the handlebar, a rotating member rotatable about the pivot shaft, a push mechanism for rotating the rotating member in a first direction and a return mechanism for rotating the rotating member in a second direction. In a more preferred embodiment of the invention, an adjuster piston is threadingly engaged with the master cylinder assembly for adjusting the initial position of the slave cylinder.
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Ichida Tadashi
Tsumiyama Akira
Charles Marcus
Jeffer Mangels Butler & Marmaro LLP
Shimano Inc.
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