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:
Dec. 09, 2003
Filed:
Mar. 28, 2002
Stuart Yeo, Stretton, GB;
Peter J Goodman, Bristol, GB;
Rolls-Royce plc, London, GB;
Abstract
A vibration damper for a gas turbine engine has convergent friction surfaces and and is located radially inward of the platforms and of two adjacent turbine blades. The angle subtended by the friction surfaces and is smaller than that subtended by the angled faces and associated with the platforms and . The center of mass of the damper lies in a plane bisecting the angle subtended by the friction surfaces and . In use the damper is urged radially outwards by centrifugal force so that at least one of the friction surfaces and makes planar contact with at least one of the angled faces and . Vibrational energy is dissipated by the resultant sliding movement between the friction surfaces and and the angled faces and . A secondary vibration damping mechanism arises from the oscillation of the damper between the platforms and