Tensioner for a timing chain

Details Tensioner for a timing chain Tensioner for a timing chain

2011-03-08

2011-03-08

Le, David D (Department: 3655)

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Tension adjuster has surface in sliding contact with belt

C474S109000, C474S135000

Reexamination Certificate

active

07901309

ABSTRACT:
A tensioner has a base plate and a pivot arm. A first end of the pivot arm is pivotally mounted to the base plate for rotation about a first axis. A spring biases the pivot arm to rotate in a tensioning direction. A push rod assembly is pivotally mounted to the second end of the pivot arm. The push rod assembly is rotatable about a second axis extending parallel to the first axis. The push rod assembly frictionally engages the pivot arm generating frictional forces counter acting and damping the spring bias. When the tensioning guide is forced to rotate in the tensioning direction, the acting moment arm of the push rod force causing the guide to rotate towards the endless drive, is considerable longer at the end of the tensioning stroke than in the beginning of the stroke.

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Young, Hugh D., Roger A. Freedman. “10.1 Torque”. Sears and Zemansky's University Physics. San Francisco, Calif.: Pearson/Addison Wesley, 2004. 362-363.
International Search Report & Written Opinion for PCT/CA2005/001336 Dated Jan. 6, 2006.

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