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:
Sep. 14, 2021
Filed:
Jun. 17, 2019
GM Global Technology Operations Llc, Detroit, MI (US);
Rajesh Kumar R, Kerala, IN;
Michael J. Grimmer, Troy, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A coulomb friction damped drive shaft may include an outer shaft defined by a longitudinal axis, a first tapered portion and a second tapered portion at opposite ends of the outer shaft; an inner shaft inserted through the outer shaft along the longitudinal axis and defined by a first uniform portion a second uniform portion adjacent to opposite ends of the inner shaft; a first tapered sleeve inserted between the first uniform portion and the first tapered portion; and a second tapered sleeve inserted between the second uniform portion and the second tapered portion. The first tapered sleeve may be biased along the longitudinal axis toward the second tapered sleeve to create a friction between the inner shaft and the outer shaft. The friction may act on a twisting motion of the inner shaft relative to the outer shaft to coulomb friction dampen oscillations in the inner shaft.