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:
Mar. 19, 1991
Filed:
Oct. 12, 1989
Applicant:
Inventors:
Donald E Haddad, Amston, CT (US);
Emilio Pereiras, Jr, Shelton, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C / ;
U.S. Cl.
CPC ...
60 3902 ; 60 3924 ; 60 3975 ; 415178 ;
Abstract
A method for controlling radial clearance in a gas turbine engine (10) uses a mathematical algorithm to synthesize the current clearance .delta., including the transient effects of prior engine operations. The synthesized clearance is compared (202) to a schedule of desired clearance (206) for closing .delta. a cooling air modulating valve (44) as required to avoid rubbing between the rotating blade tips and surrounding shroud.