Rocker arm and manufacturing method thereof

Details Rocker arm and manufacturing method thereof Rocker arm and manufacturing method thereof

2005-05-10

2005-05-10

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C029S888200, C123S090160

Reexamination Certificate

active

06889643

ABSTRACT:
A gap (34) for forming an excess thickness portion is provided between a pair of first dies (26, 27) and a intermediate portion (32) of the second die (24), and an excess thickness portion (35) is formed in bottom portions of the valve guide walls (28, 29) of valve guide walls.

REFERENCES:
patent: 4803766 (1989-02-01), Akao et al.
patent: 5535641 (1996-07-01), Uchida et al.
patent: 5946800 (1999-09-01), Daigo
patent: 100 30 341 (2002-01-01), None
patent: 1 122 408 (2001-08-01), None
patent: 7-155888 (1995-06-01), None
patent: 2001-191139 (2001-07-01), None
patent: 2001-198641 (2001-07-01), None
patent: 2001-271615 (2001-10-01), None

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