Hydraulic valve lifter assembly

Details Hydraulic valve lifter assembly Hydraulic valve lifter assembly

2007-07-17

2007-07-17

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090440, C123S090520

Reexamination Certificate

active

11390409

ABSTRACT:
A hydraulic valve lifter assembly including a lifter body and a cam follower. The cam follower is mounted to an end of the lifter body wherein the lifter body has a first diameter over a first body portion for engaging a wall of an engine bore. The lifter body also including a second diameter smaller than the first diameter over a second body portion supportive of the cam follower. The hydraulic valve lifter assembly further including a contiguous annular transitional chamfer between the first and second diameter portions of the lifter body.

REFERENCES:
patent: 4457270 (1984-07-01), Kodama et al.
patent: 4463714 (1984-08-01), Nakamura
patent: 6247433 (2001-06-01), Faria et al.
patent: 6578535 (2003-06-01), Spath et al.
patent: 6595174 (2003-07-01), Schnell
patent: 6606972 (2003-08-01), Wenisch et al.
patent: 6988474 (2006-01-01), Itoafa
patent: 2005/0056246 (2005-03-01), Itoafa

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