Primary housing assembly for a motorcycle engine

Details Primary housing assembly for a motorcycle engine Primary housing assembly for a motorcycle engine

2007-02-13

2007-02-13

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Frame construction

Horizontal cylinder

C123S1950HC

Reexamination Certificate

active

11174427

ABSTRACT:
A primary housing for a motorcycle engine includes an inner housing that defines internal coupling apertures, transmission coupling apertures, and external coupling apertures. Internal fasteners extend through the internal coupling apertures and the transmission coupling apertures to couple the inner housing to the crankcase and the transmission. An outer housing defines coupling apertures that align with the external coupling apertures and fasteners extend through the coupling apertures, through the external coupling apertures, and into the engine crankcase to couple the inner and outer housings to the crankcase. A resonant damping device is rigidly or moveably coupled to an anti-node region of the outer housing to reduce noise emissions from the outer housing during engine operation.

REFERENCES:
patent: 4030553 (1977-06-01), Rockwell
patent: 4516658 (1985-05-01), Scarton et al.

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