Deactivation roller hydraulic valve lifter

Details Deactivation roller hydraulic valve lifter Deactivation roller hydraulic valve lifter

2007-12-18

2007-12-18

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090520, C123S090550, C123S090590, C123S19800E, C074S569000

Reexamination Certificate

active

11519165

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:
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patent: 7104232 (2006-09-01), Hendriksma et al.
patent: 2003/0101953 (2003-06-01), Hendriksma et al.

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