Valve drive system for four-stroke engine

Details Valve drive system for four-stroke engine Valve drive system for four-stroke engine

2005-08-30

2005-08-30

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090210, C123S090180, C123S090200, C123S090390, C123S090440, C074S569000

Reexamination Certificate

active

06935289

ABSTRACT:
A valve drive system capable of reducing the friction resistance of rocker arms and facilitating replacement work of tappet-clearance adjusting shims. The valve drive system can comprise a rocker arm that is slidable between a first position at which the pushing portion engages the shim and a second position at which the pushing portion is disengaged from the shim, and held in the first position through a spring.

REFERENCES:
patent: 3878822 (1975-04-01), Beal
patent: 4182289 (1980-01-01), Nakajima et al.
patent: 4499870 (1985-02-01), Aoyama
patent: 4516542 (1985-05-01), Aoyoma et al.
patent: 5111781 (1992-05-01), Kaku et al.
patent: 6748913 (2004-06-01), Nakayama
patent: 11-166449 (1999-06-01), None
patent: 2001-193426 (2001-07-01), None

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