Machine element or mechanism – Gearing – Interchangeably locked
Reexamination Certificate
2006-03-23
2008-12-30
Le, David D. (Department: 3681)
Machine element or mechanism
Gearing
Interchangeably locked
C074S329000, C074S337500
Reexamination Certificate
active
07469611
ABSTRACT:
A transmission structure of a power unit for a vehicle includes a clutch mechanism that is provided between a crankshaft and a main shaft, and is installed at the end of the main shaft outside a crankcase. The transmission includes a shift drum for driving shift forks for selectively establishing any of plural speeds. Both ends in an axial direction of the shift drum are rotatably supported by the crankcase. In the transmission structure, a sealed structure dedicated to the shift drum is not required, the number of parts is reduced and the assembly time is reduced. The shift drum, arranged in the maximum outside diameter of the clutch mechanism when viewed in a plane perpendicular to the axis of the main shaft, is assembled in the crankcase from the side of the clutch mechanism.
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Kawakubo Hiroyuki
Tawarada Yuichi
Blackman William D.
Carrier Joseph P.
Carrier Blackman & Associates P.C.
Honda Motor Co. Ltd.
Le David D.
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