Endless belt power transmission systems or components – Means for adjusting belt tension or for shifting belt,... – Guide roll mounted for movement of its axis along arcuate...
Patent
1990-06-13
1991-10-01
Britts, Ramon S.
Endless belt power transmission systems or components
Means for adjusting belt tension or for shifting belt,...
Guide roll mounted for movement of its axis along arcuate...
474138, F16H 712
Patent
active
050529820
ABSTRACT:
An autotensioner which is designed to apply appropriate tension to a timing belt of an engine or a belt that drives auxiliary machinery, for example, an alternator, compressor, etc. The autotensioner has an annular space that is partitioned into two chambers by a first partition wall which is provided on a fixed member and a second partition wall which is provided on a pivoting member, the annular space being filled with a viscous fluid. The first partition wall is formed with a passage which provides communication between the two chambers, and a check valve is provided in the passage. The check valve closes the passage when the tension in the belt increases suddenly, to resist the pivotal movement of the tensioner in one rotational direction, thereby enabling the tensioner to follow slowly and effectively the movement of the belt in which the tension is suddenly increased. The check valve opens the passage when the portion of the belt engaged by the tensioner becomes slack, thereby decreasing the resistance to movement of the second partition wall within the viscous fluid, thus enabling the tensioner to move rapidly in a rotational direction opposite the direction of movement of the tensioner when the tension in the belt increases.
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patent: 1852755 (1932-04-01), Peo
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Britts Ramon S.
Nippon Seiko Kabushiki Kaisha
Schoeppel Roger J.
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