Internal-combustion engines – Poppet valve operating mechanism – Tappet
Reexamination Certificate
2006-04-11
2008-08-12
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Tappet
C123S090570, C123S090550, C123S090520
Reexamination Certificate
active
07409941
ABSTRACT:
A deactivating hydraulic valve mechanism includes a hydraulic element assembly disposed within cup within a pin housing slidably disposed within a bore in a body. A transverse bore in the pin housing contains selectively-retractable locking pins that engage a locking feature in the body to selectively lock together the body and the pin housing. A lost motion spring is disposed in a vented annular chamber between the body and the pin housing. An oil passage from an engine gallery to the hydraulic element assembly includes an axial component formed in the cup and bypasses the lost motion chamber. A ring holds the lifter assembly together and also sets mechanical lash. The ring may combine a standard-thickness ring and a shim selected to provided a predetermined amount of mechanical lash in the assembled mechanism to ensure facile engagement and disengagement of the locking pins in the body.
REFERENCES:
patent: 6196175 (2001-03-01), Church
patent: 6321704 (2001-11-01), Church et al.
patent: 6497207 (2002-12-01), Spath et al.
patent: 7246585 (2007-07-01), Spath et al.
McCarroll Michael E.
Spath Mark J.
Delphi Technologies Inc.
Denion Thomas
Riddle Kyle M
Smith Michael D.
LandOfFree
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