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:
Sep. 26, 1989
Filed:
Sep. 02, 1988
Jeffrey D Metcalf, Albion, IL (US);
John C Layer, Caledonia, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
An overspeed governor for adjusting the blade pitch of a propulsor in an unducted fan aircraft engine to prevent propulsor overspeed comprises a flyweight governor which is rotated in response to rotation of the propulsor, a governor pilot valve with a valve spool which is axially moved in response to actuation of the flyweight governor for adjusting the blade pitch of the propulsor, and a governor checkout apparatus which sensitizes the flyweight governor so that it is actuated to maintain a substantially lower propulsor rotative speed during a start-up operation of the engine as compared with during normal operation, whereby the operation of the governor can be checked out during start-up operation of the aircraft engine.