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. 22, 2016
Filed:
Dec. 02, 2011
Bruce Fielding, Glen Williams, CA;
Assaf Farah, Charlemagnes, CA;
Karl D. Blume, Hebron, CT (US);
Lam Nguyen, Brossard, CA;
Theodore W Kapustka, Glastonbury, CT (US);
Bruce Fielding, Glen Williams, CA;
Assaf Farah, Charlemagnes, CA;
Karl D. Blume, Hebron, CT (US);
Lam Nguyen, Brossard, CA;
Theodore W Kapustka, Glastonbury, CT (US);
PRATT & WHITNEY CANADA CORP., Longueuil, QC, CA;
Abstract
A gas turbine engine has a spool including compressor and turbine rotors connected by a first shaft. The first shaft extends concentrically around a second shaft. The first shaft forward end has a portion with an inner diameter of close tolerance with the second shaft. The second shaft has a region of enlarged diameter located axially aft of the compressor rotor but axially forward of the forward end of the first shaft. The region of enlarged diameter has a diameter greater than the inner diameter of the forward end portion of the first shaft to cause the region of enlarged diameter of the second shaft to engage the first shaft in interference in the event that the second shaft is moved axially aft relative to the first shaft more than a pre-selected axial distance.