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:
Jan. 22, 1991
Filed:
Oct. 27, 1988
Applicant:
Inventors:
John C Layer, Caledonia, IL (US);
Jeffrey D Metcalf, Albion, IL (US);
Assignee:
Sundstrand Corporation, Rockford, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B63H / ;
U.S. Cl.
CPC ...
416 48 ; 416 50 ; 60448 ;
Abstract
An overspeed protection system for an aircraft fan engine wherein blades are rotatable from a coarse pitch to a fine pitch to a thrust-reverse condition. A wobbler-type hydraulic motor is provided for rotating the blade. An overspeed governor is operatively associated with the motor for effecting rotation of the blades in a direction toward the coarse pitch condition. A control, including a solenoid valve actuatable in thrust-reverse mode, changes the sense of the hydraulic motor to drive the motor further into thrust-reverse on actuation of the overspeed governor means.