The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2018
Filed:
Aug. 18, 2015
Applicant:
Borgwarner Inc., Auburn Hills, MI (US);
Inventors:
Sean R. Simmons, Cortland, NY (US);
Simon Barrette, Lansing, NY (US);
Assignee:
BorgWarner Inc., Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 7/12 (2006.01); F16H 7/08 (2006.01); F16H 7/18 (2006.01);
U.S. Cl.
CPC ...
F16H 7/0838 (2013.01); F16H 7/0831 (2013.01); F16H 7/1218 (2013.01); F16H 7/18 (2013.01); F16H 7/08 (2013.01); F16H 7/1209 (2013.01); F16H 2007/081 (2013.01); F16H 2007/185 (2013.01);
Abstract
A tensioner uses a low rate torsion spring in a first stage and a high rate torsion spring in a second stage to maintain tension in a chain or belt. The first stage is connected to the second stage by a torque coupling. The high rate torsion spring is maintained in an energized state between a ground and a dead stop to store energy and to provide tension under high loads. In some embodiments, the torque coupling is a damper. In other embodiments, the torque coupling is a clutch. A method stores energy in a high rate torsion spring of a tensioner.