Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2011-03-01
2011-03-01
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090310, C123S090150
Reexamination Certificate
active
07895980
ABSTRACT:
A valve timing adjusting device includes a housing, a first vane rotor, a second vane rotor, a biasing device, and a limiting device. The second vane rotor is coaxial with the first vane rotor. The biasing device has a first end engaged with the first vane rotor and a second end engaged with the second vane rotor. The biasing device biases one of the first and second vane rotors in the advance direction, and biases the other one in the retard direction. The limiting device allows the first vane rotor to rotate relative to the second vane rotor when pressure of working fluid is lower than a preset level, and limits the first vane rotor from rotating relatively when the pressure is not lower than the preset level.
REFERENCES:
patent: 6439184 (2002-08-01), Takenaka et al.
patent: 2005-36760 (2005-02-01), None
patent: 2007-138730 (2007-06-01), None
patent: 2007-270625 (2007-10-01), None
Denso Corporation
Eshete Zelalem
Nixon & Vanderhye PC
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