Tensioner for a chain or belt
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 1, 2005
Grant Date -
Jul 18, 2002
app pub date -
Oct 11, 2001
filing date -
Oct 13, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A chain or belt tensioner comprises a plunger displaceable in a housing between retracted and extended positions. A stop ring between the plunger and housing frictionally contacts a smooth surface of the housing. A recess in the plunger has a tapered face for engagement with a bevelled surface of the stop ring. Inward movement of the plunger causes the tapered face to engage the stop ring and to force it to deform outwardly to a wedging position in which the stop ring is wedged between the tapered face and the surface thus preventing further inward movement of the plunger. The recess has a second face that engages the stop ring when the plunger moves out of the housing so as to slide it over the surface. The invention provides for a stop mechanism that enables retraction of the plunger to be prevented at an infinite number of positions.
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