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. 11, 1976
Filed:
Dec. 04, 1974
Stanley George Glaze, Brierley Hill, EN;
John Richard Simmons, Wolverhampton, EN;
Joseph Lucas (Industries) Limited, Birmingham, EN;
Abstract
A hydraulic actuating arrangement for an aircraft control surface has a control circuit, responsive to a position selection input signal, for providing six nominally identical output control signals. Six pilot valves respectively responsive to the control signals provide six servo pressure signals to respective ones of six intermediate actuators. The intermediate actuators are resiliently coupled to each of two main hydraulic control valves. Three of the intermediate actuators and one of the main control valves are supplied from a first hydraulic pressure source, the remaining three intermediate actuators and the remaining main control valve being supplied from a second hydraulic pressure source. An output actuator is responsive to output pressures from either of the main control valves.