Internal-combustion engines – Poppet valve operating mechanism – Tappet
Reexamination Certificate
2005-11-30
2008-08-12
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Tappet
C123S090200, C123S090440, C074S053000, C074S569000
Reexamination Certificate
active
07409940
ABSTRACT:
In a variable phased valve lifter of an internal combustion engine, two or more roller lifter are allowed to move along constraining faces of a constraining mechanism in a first direction, and the constraining mechanism is allowed to move freely in a second direction. As the roller lifters move through their parallel arcuate paths, the engaging surface(s) of the roller lifters will engage with the constraining face(s) of the constraining mechanism, and each roller lifter will prevent the other from rotating about its longitudinal axis. The roller lifter is thus prevented from rotating about its longitudinal axis as it moves in arcuate fashion in cooperation with the constraining mechanism.
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Lee W. Young, Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, Oct. 30, 2007.
Chang Ching
Gradisar Stanley J.
Merchant & Gould P,C,
Motive Engineering Co.
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