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:
Nov. 12, 2013
Filed:
May. 12, 2011
Albert H. Butlin, Jr., Beverly Hills, MI (US);
Vincent A. Bommarito, Grosse Pointe, MI (US);
James F. Collins, Farmington Hills, MI (US);
Albert H. Butlin, Jr., Beverly Hills, MI (US);
Vincent A. Bommarito, Grosse Pointe, MI (US);
James F. Collins, Farmington Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A damper mass damper assembly includes a rod, and a casing disposed annularly about the rod and defining a primary fluid chamber therebetween. The rod includes an annular wall that defines a first and a second expansion chamber disposed at a first and a second end of the rod respectively. The rod further defines a first and a second expansion port connecting the first and the second expansion chambers respectively with the primary fluid chamber in fluid communication. As fluid within the primary fluid chamber expands from heating, the fluid may weep into the first and/or second expansion chambers through the first and/or second expansion ports respectively to maintain the integrity of a first and second cap bearing seal, which seal the fluid within the primary fluid chamber.