Rocker arm and method of manufacturing the rocker arm

Details Rocker arm and method of manufacturing the rocker arm Rocker arm and method of manufacturing the rocker arm

2006-12-26

2006-12-26

Denion, Thomas (Department: 3748)

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

C029SDIG018, C029SDIG047, C123S090390, C123S090410, C123S090440, C123S090450, C074S559000, C074S569000

Reexamination Certificate

active

07152320

ABSTRACT:
In relation to a rocker arm obtained by applying cold forging to a blank made from a metal wire rod, cold forging is applied to a blank obtained by cutting a metal wire rod to a predetermined length to make a second intermediate blank34bhaving a pair of side wall sections2aand a base39which connects the two side walls2aat one of their respective widthwise edges. Punching is applied to the base39of this second intermediate blank34bto form a first and a second connection sections. In the case where it is assumed that a roller35is arranged at a position corresponding to an arrangement position of the roller35of the rocker arm to be obtained, on the inside of the second intermediate blank34bwhich is to be subjected to punch processing, the roller35and the base39do not interfere with each other. As a result, performance improvement of an engine fitted with this rocker arm is obtained.

REFERENCES:
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patent: 6729285 (2004-05-01), Ammon et al.
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International Search Report dated Aug. 24, 2004.
International Preliminary Report on Patentability dated May 1, 2006.

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