Valve lifter

Details Valve lifter Valve lifter

2007-01-02

2007-01-02

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090480, C074S569000

Reexamination Certificate

active

11345606

ABSTRACT:
A valve lifter, in which an amorphous hard carbon film is coated at least on the surface that slides against a cam, is characterized in that the surface of a base material (substrate) has an arithmetic mean roughness of Ra 0.01 to 0.03 micrometers, and the maximum length of the scratch on the base surface is made to be equal to or shorter than 250 micrometers.

REFERENCES:
patent: 5456136 (1995-10-01), Yamashita et al.
patent: 5997988 (1999-12-01), Sada
patent: 05-163909 (1993-06-01), None
patent: 2002-309912 (2002-10-01), None
patent: 2004-137535 (2004-05-01), None

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