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:
Oct. 26, 2010
Filed:
May. 08, 2007
Roger a Sutherland, Derby, GB;
Colin R Barnfather, Derby, GB;
Jonathan E Holt, Derby, GB;
Christopher D Jack, Derby, GB;
Ralph W Hill, Matlock, GB;
Roger A Sutherland, Derby, GB;
Colin R Barnfather, Derby, GB;
Jonathan E Holt, Derby, GB;
Christopher D Jack, Derby, GB;
Ralph W Hill, Matlock, GB;
Rolls-Royce plc, London, GB;
Abstract
A clearance control apparatus for controlling the clearance between a rotary assembly () and a casing () surrounding the rotary assembly () is disclosed. The clearance control apparatus comprises a temperature measuring device () to measure the temperature of a radially outer portion of the rotary assembly and a cooling arrangement () to cool the casing (). A control system () is associated with the temperature measuring device () and the cooling arrangement () to control the extent of cooling of the casing (). The extent of cooling is dependent upon the temperature of the aforesaid portion.