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:
May. 23, 2017
Filed:
Dec. 04, 2015
Applicant:
GM Global Technology Operations Llc, Detroit, MI (US);
Inventor:
Andrew W. Phillips, Rochester, MI (US);
Assignee:
GM Global Technology Operations LLC, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16F 1/04 (2006.01); F16F 15/123 (2006.01); F16F 15/134 (2006.01); F16F 15/121 (2006.01); F16D 3/12 (2006.01); F16F 15/133 (2006.01); F16F 15/30 (2006.01);
U.S. Cl.
CPC ...
F16F 15/1213 (2013.01); F16D 3/12 (2013.01); F16F 1/042 (2013.01); F16F 1/043 (2013.01); F16F 15/123 (2013.01); F16F 15/1331 (2013.01); F16F 15/30 (2013.01);
Abstract
Arc coil springs utilize coil spring wire formed in a substantially trapezoidal or other shape such that when bottomed, the side surfaces of the coil abut and carry the bottoming load. The angles of the sidewalls of the substantially trapezoidal cross section wire are preferably coincident with lines of radius when the spring is installed in an arc in a clutch, damper or flywheel. The radius of the outer surface of the arc coil spring wire is matched to the radius of the inner surface of the guide or housing so that the area of contact is large.