Valve drive having a rocker arm

Details Valve drive having a rocker arm Valve drive having a rocker arm

2005-02-08

2005-02-08

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C123S090440, C123S090470

Reexamination Certificate

active

06851403

ABSTRACT:
A valve drive having a rocker arm mounted on a cylinder head is provided. One end of the rocker arm is actuated by a push rod to actuate a valve stem of a poppet valve that engages the other end of the rocker arm, which is pivotably held between its ends on a support pin that extends into the cylinder head, with a spherical mounting being provided between the support pin and the rocker arm. Provided on that side of the rocker arm remote from the cylinder head is a bolt head for adjusting the bearing spacing between the rocker arm and the cylinder head for adjusting valve play. To prevent unintended adjustment of the bolt head, the latter cooperates with a rotation preventing element that has an arresting portion that engages the bolt head, and a support portion that conveys the adjustment moment away.

REFERENCES:
patent: 3251350 (1966-05-01), Thompson
patent: 4221199 (1980-09-01), Buuck et al.
patent: 4256070 (1981-03-01), Mueller
patent: 4440121 (1984-04-01), Clancy et al.
patent: 4653441 (1987-03-01), Belsanti
patent: 4676203 (1987-06-01), Nouno
patent: 4762099 (1988-08-01), Fujii et al.
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patent: 4934323 (1990-06-01), Grinsteiner
patent: 5190000 (1993-03-01), van Schaik et al.
patent: 5323741 (1994-06-01), Holzapfel et al.
patent: 5645025 (1997-07-01), Caya et al.

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