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. 31, 2023
Filed:
May. 21, 2020
Applicant:
Raytheon Technologies Corporation, Farmington, CT (US);
Inventors:
Pantcho P. Stoyanov, West Hartford, CT (US);
Michael D. Greenberg, Bloomfield, CT (US);
Assignee:
Raytheon Technologies Corporation, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 17/16 (2006.01);
U.S. Cl.
CPC ...
F01D 17/162 (2013.01); F05D 2230/31 (2013.01); F05D 2230/313 (2013.01); F05D 2230/314 (2013.01); F05D 2240/12 (2013.01);
Abstract
A variable vane assembly includes a variable vane; a trunnion arranged on one end of the variable vane; a bushing mated to the trunnion to define an interface between the trunnion and the bushing; and a surface modification on at least one of the trunnion and the bushing at the interface, whereby frictional heating at the interface during operation of the assembly is reduced.