Borgwarner Inc.

James Capp

George L Markley

Mark M Wigsten

A tensioner for imparting tension to a chain having a body, a resilient chain guide element a support member and at least one blade spring. The body contains at least one groove on its surface adjacent to the resilient chain guide for containing a blade spring in compression. The length of the blade spring is less than the length of the support member.

Long mechanical tensioner with a compliant blade spring

A blade tensioner comprising a blade shoe, a sliding surface with a first and a second side, a ratchet rod attached to the distal end of the blade shoe having a length of teeth, and a spring clip for receiving the ratchet rod and being slidable along the second side of the sliding surface. When the slack on the chain increases, a distal end of the blade shoe pivots and slides on the first side of the sliding surface, and the spring clip slides on the second side of the sliding surface a distance limited by the engagement of the tab of the spring clip with the corresponding indentation on the second side of the sliding surface and the edge of the spring clip engages the teeth of the ratchet rod.

Mechanical chain tensioner with ratcheting device

A closed loop chain tensioner system having a drive sprocket, one or more driven sprockets, a first mechanical tensioner located adjacent a slack strand and a second mechanical tensioner located adjacent a tight strand. Each tensioner is independently pivotally mounted to the engine block. The mounting point may be located at any point along the length of each tensioner. The tensioners are then linked to each other by a rigid, solid link. This solid link enables the tensioners to act in unison, thus providing damping across both strands of chain in response to engine torsional variations.

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Endwell, NY, United States of America

James Capp