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:
May. 26, 2015
Filed:
Sep. 04, 2012
Ian A. Macfarlane, St-Bruno, CA;
Ian A. MacFarlane, St-Bruno, CA;
Pratt & Whitney Canada Corp., Longueuil, CA (US);
Abstract
Systems and methods for driving an oil cooling fan () of a gas turbine engine () during different modes of operation of the gas turbine engine () are described. A system may include a coupling device () configured to: transmit motive power from a power turbine shaft () of the gas turbine engine () to the oil cooling fan () during a first mode of operation where the power turbine shaft () is turning, and to decouple the oil cooling fan () from the power turbine shaft () during a second mode of operation where the power turbine shaft () is prevented from turning. An alternate source () of motive power may be configured to drive the oil cooling fan () during the second mode of operation.