Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2006-10-24
2006-10-24
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C464S160000
Reexamination Certificate
active
07124722
ABSTRACT:
A VCT system having a housing, a rotor, a locking pin, and a spool valve. The spool valve has a spool slidably located in a bore with a plurality of ports. The spool has a plurality of lands that block the ports. When the spool is in the advance position, the plurality of lands allow fluid through the ports from the retard chamber to the advance chamber. When the spool is in the retard position, the plurality of lands allow fluid through the ports from the advance chamber to the retard chamber. When the spool is in the null position, the plurality of lands allow fluid from a source to the advance and retard chambers. When the spool is in the locked position, the plurality of lands allow fluid supplied to one of the advance chamber or the retard chamber to move the locking pin to a locked position.
REFERENCES:
patent: 5497738 (1996-03-01), Siemon et al.
patent: 6477999 (2002-11-01), Markley
patent: 6481402 (2002-11-01), Simpson et al.
patent: 6644258 (2003-11-01), Smith
patent: 6668778 (2003-12-01), Smith
patent: 6766777 (2004-07-01), Simpson et al.
patent: 6772721 (2004-08-01), Gradner et al.
patent: 6814038 (2004-11-01), Smith
patent: 2003/0196628 (2003-10-01), Smith
patent: 2004/0025822 (2004-02-01), Simpson et al.
patent: 2004/0055550 (2004-03-01), Smith
patent: 2005/0034695 (2005-02-01), Smith
patent: 1128026 (2001-08-01), None
patent: 1400661 (2004-03-01), None
Borg-Warner Inc.
Brown & Michaels PC
Chang Ching
Denion Thomas
Dziegielewski Greg
LandOfFree
Remote variable camshaft timing control valve with lock pin... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remote variable camshaft timing control valve with lock pin..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remote variable camshaft timing control valve with lock pin... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3688092