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. 07, 2004
Filed:
Dec. 04, 2002
Rolls-Royce plc, London, GB;
Abstract
A gas turbine engine includes an intermediate pressure compressor connected to an intermediate pressure turbine by a driveshaft . The driveshaft comprises a downstream turbine shaft attached to the intermediate pressure turbine and an upstream compressor shaft attached to the intermediate pressure compressor . The compressor shaft and turbine shaft are connected together by a splined connection which allows the turbine shaft to drive the compressor shaft . If the splined connected should fail, so that it no longer transmits torque, a further splined connection comes into operation to transmit torque between the turbine shaft and compressor shaft . When this happens, torque is transmitted via a torsionally weakened, shear section of the turbine shaft which tends to break under certain engine conditions. The turbine shaft is then released axially and turbine overspeed is restrained.