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:
Jul. 20, 2021
Filed:
Mar. 18, 2019
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventors:
Thomas Veitch, Toronto, CA;
David Beamish, Mississauga, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 27/04 (2006.01); F01D 25/16 (2006.01); F16F 15/02 (2006.01); F16F 15/023 (2006.01);
U.S. Cl.
CPC ...
F16C 27/045 (2013.01); F01D 25/164 (2013.01); F16F 15/0237 (2013.01); F05D 2240/54 (2013.01); F05D 2260/96 (2013.01); F16C 2360/23 (2013.01); F16F 2222/12 (2013.01);
Abstract
A multi-film oil damper has a housing defining an annular damper cavity between a radially outward wall and radially extending side walls. The annular damper cavity has an oil inlet configured for connection to a source of pressurized oil. A closure ring defines a radially inward boundary of the annular damper cavity. First and second damper rings are nested together coaxially within the annular damper cavity. At least one of the first damper ring and the second damper ring has an axial end radial thickness less than an intermediate-portion radial thickness.