Rocker arm

Details Rocker arm Rocker arm

2005-06-28

2005-06-28

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C123S090390

Reexamination Certificate

active

06910452

ABSTRACT:
In order to improver a response of a rocker arm by reducing a moment of inertia of the rocker arm around a pivot portion thereof, the invention provides a rocker arm comprises a metal-plate-made rocker arm main body including a pivot portion and a valve stem guide portion respectively formed in the longitudinal-direction two end portions thereof. In the provided rocker arm, the center-of-gravity position of the rocker arm main body is set at a position shifted to the pivot portion side from the longitudinal-direction center thereof. Moreover, The clearance between a pair of opposing side wall portions formed in the valve stem guide portion is set narrow so that the center-of-gravity of the rocker arm main body can be set at a position shifted to the pivot portion side from the longitudinal-direction center thereof.

REFERENCES:
patent: 5123384 (1992-06-01), Abbas
patent: 5678459 (1997-10-01), Motohashi et al.
patent: 04308307 (1992-10-01), None
patent: 05-033611 (1993-02-01), None
patent: 05-272310 (1993-10-01), None
patent: 06-108809 (1994-04-01), None
patent: 07-011919 (1995-01-01), None
patent: 09-91831 (1997-04-01), None
patent: 2001-47180 (2001-02-01), None
patent: 2001-191139 (2001-07-01), None
patent: 2002-195011 (2002-07-01), None
European Search Report dated Feb. 13, 2004.

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