Internal-combustion engines – Poppet valve operating mechanism – Rocker
Reexamination Certificate
2005-02-08
2005-02-08
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Rocker
C123S090440, C123S090470
Reexamination Certificate
active
06851403
ABSTRACT:
A valve drive having a rocker arm mounted on a cylinder head is provided. One end of the rocker arm is actuated by a push rod to actuate a valve stem of a poppet valve that engages the other end of the rocker arm, which is pivotably held between its ends on a support pin that extends into the cylinder head, with a spherical mounting being provided between the support pin and the rocker arm. Provided on that side of the rocker arm remote from the cylinder head is a bolt head for adjusting the bearing spacing between the rocker arm and the cylinder head for adjusting valve play. To prevent unintended adjustment of the bolt head, the latter cooperates with a rotation preventing element that has an arresting portion that engages the bolt head, and a support portion that conveys the adjustment moment away.
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Dürr Bernhard
Häberlein Jürgen
Imke Bruhns
Rabis Manfred
Schliemann Harald
Andreas Stihl AG & Co.
Becker Robert W.
Corrigan Jaime
Denion Thomas
Robert W. Becker & Associates
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