Patent ID: 9212731
Filing Date: 2015-12-15
Classification: F16H

Abstract:
1. A tensioner comprising: an arm rotatable about a first axis, the arm comprising an arm arbor, the arm arbor having a sleeve, wherein the sleeve defines an open end; an outer spring operatively coupled to the arm, the outer spring having an outer coil that defines an outer diameter; a support member for receiving the arm arbor and the outer spring, wherein the support member is stationary and includes a pivot shaft that defines the first axis; a hub defining an opening for receiving the pivot shaft of the support member, wherein the hub closes the open end of the sleeve; and at least one inner spring operatively coupled to the arm, the inner spring having an inner coil that defines an inner diameter, the inner diameter of the inner coil being less than the outer diameter of the outer coil such that at least a portion of the inner spring is received by the outer spring, and wherein the outer spring and the inner spring both urge the arm to rotate about the first axis into tensioning engagement with a power transmitting element, and wherein the hub connects the inner spring with the outer spring such that the inner spring and the outer spring are connected to one another in series and share torque between one another.