Plastic hydraulic tensioner

Details Plastic hydraulic tensioner Plastic hydraulic tensioner

2006-06-13

2009-06-02

Johnson, Vicky A (Department: 3656)

Endless belt power transmission systems or components

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

Tension adjuster or shifter driven by electrical or fluid motor

Reexamination Certificate

active

07540816

ABSTRACT:
In a plastic hydraulic tensioner having an oil reservoir formed as a recess in a portion of a synthetic resin tensioner body adapted to engage a tensioner mounting surface on an engine block, metal bushings are insert-molded in the synthetic resin tensioner body for receiving mounting bolts by which the tensioner is secured to an engine block. The outer circumferential surface of each bushing is provided with at least one flat portion or at least one concave groove, and a protruding portion of the bushing is formed adjacent the end of the flat or groove remote from the engine block-contacting end of the bushing.

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