Deactivation roller hydraulic valve lifter

Details Deactivation roller hydraulic valve lifter Deactivation roller hydraulic valve lifter

2006-09-12

2006-09-12

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090590, C123S19800E, C123S090520, C123S090550, C074S569000

Reexamination Certificate

active

07104232

ABSTRACT:
A deactivation valve lifter includes a lifter body. The lifter body has a first end configured for engaging a cam of an engine and at least one annular pin chamber. A pin housing includes a pin housing bottom. The pin housing bottom defines at least one pin stop aperture and a radially directed pin bore. A deactivation pin assembly is disposed within the pin bore and includes pin members. The pin housing is concentrically disposed within the lifter body. A portion of each pin member may be disposed within the annular pin chamber to thereby selectively couple and decouple the lifter body to the pin housing. A drain aperture defined by the pin housing bottom extends from the pin bore to an outside surface of the pin housing. A stop pin is disposed in the at least one pin stop aperture for limiting the inward motion of the pin members.

REFERENCES:
patent: 5090364 (1992-02-01), McCarroll et al.
patent: 5875748 (1999-03-01), Haas et al.
patent: 6196175 (2001-03-01), Church
patent: 6257185 (2001-07-01), Groh et al.
patent: 6321704 (2001-11-01), Church et al.
patent: 6513470 (2003-02-01), Hendriksma et al.
patent: 6595174 (2003-07-01), Schnell
patent: 6668776 (2003-12-01), Hendriksma et al.
patent: 6814040 (2004-11-01), Hendriksma et al.
patent: 2003/0101953 (2003-06-01), Hendriksma et al.

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