TENSIONER WITH SINGLE TORSION SPRING HAVING MULTIPLE NESTED WINDINGS
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United States of America Patent
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Issued Date -
Jan 29, 2015
app pub date -
Jul 26, 2013
filing date -
Jul 26, 2013
priority date (Note) -
Abandoned
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Abstract
A tensioner is disclosed that may be part of a power system where the tensioner provides tension to an endless power transmitting element such as a belt, chain, or other continuous loop. The tensioner includes an arm that is rotatable about a first axis and a spring. The spring has at least one inner winding, an outer winding, and a transition zone. The outer winding has an outer coil that defines an outer diameter. The inner winding has an inner coil that defines an inner diameter. The inner diameter of the inner coil is less than the outer diameter of the outer coil such that at least a portion of the inner winding is received by the outer winding. The outer winding and the inner winding of the spring both urge the arm to rotate about the first axis and into tensioning engagement with the power transmitting element.
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