Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2005-07-26
2005-07-26
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090160, C123S090150, C464S161000
Reexamination Certificate
active
06920854
ABSTRACT:
A VVA apparatus includes drive-input and intake-side transmission sprockets provided to an intake-side phase alteration device, an exhaust-side transmission sprocket provided to the exhaust-side phase alteration device, a reduced-diameter portion provided to a housing of the exhaust-side phase alteration device between a housing main body and the exhaust-side transmission sprocket, and a torsion coil spring arranged between the housing and vane rotor of the exhaust-side phase alteration device to bias the two in the advance direction. The torsion coil spring is disposed on the outer periphery of the reduced-diameter portion to have a reduced diameter when the phase is changed from the phase at engine start.
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patent: 6250266 (2001-06-01), Okui et al.
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patent: 2001-329811 (2001-11-01), None
Denion Thomas
Foley & Lardner LLP
Hitachi , Ltd.
Riddle Kyle M.
LandOfFree
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