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:
Jan. 04, 2011
Filed:
Sep. 27, 2007
Steven L. Clark, Canton, MI (US);
Jeffrey R. Lee, Tipton, MI (US);
Peter W. Mack, Dearborn, MI (US);
Steven L. Clark, Canton, MI (US);
Jeffrey R. Lee, Tipton, MI (US);
Peter W. Mack, Dearborn, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A damper assembly for absorbing and attenuating torsionals and vibrations transmitted from an engine to a transmission is provided. The damper assembly includes a damper flange with a plurality of spring-mass damper systems operatively attached thereto and elongated circumferentially about its outer periphery. Each spring-mass damper systems include an inner spring nestably positioned inside an outer spring, a first spring retainer having a base portion defining a first interface surface with a first pilot portion extending therefrom to define a second interface surface with a second pilot portion extending therefrom, and a second spring retainer having a base portion defining an interface surface with a pilot portion extending therefrom to define a fourth interface surface. The first and third pilot portions engage with and thereby restrict axial and radial movement of the outer spring. The second pilot portion is attached to the inner spring thereby restricting relative movement therebetween.