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
Patent
1993-01-15
1994-12-06
Schoeppel, Roger J.
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
474138, F16H 708
Patent
active
053705840
ABSTRACT:
A hydraulic tensioner having a piston slidably fitted in a piston cavity and biased in a protruding direction by a spring and fluid. The piston is cylindrical and has a conical bottom surface. A check valve permits fluid to only flow into, and thereby protrude the piston, but not out of the cavity. Air may be vented out of the cavity through the clearance between the piston and the interior wall of the housing. This clearance is dimensioned so that air may be vented from the cavity without a significant loss of fluid. The conical bottom surface of the piston is configured to force any air present in the cavity to the clearance and thus out of the tensioner.
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Borg-Warner Automotive Inc.
Schoeppel Roger J.
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