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. 06, 1994
Filed:
Nov. 04, 1993
Toshio Kamimura, Gifu, JP;
Teijin Seiko Co., Ltd., Osaka, JP;
Abstract
A control apparatus comprises a plurality of servomechanisms for controlling a control surface of an aircraft. Each of the servomechanisms is equipped with a control valve for controlling the oil pressure in hydraulic chambers of the actuator assembly operatively connected to the control surface, and a switching valve provided between the actuator assembly and the control valve and shiftable to assume driving, bypassing and damper valve positions. The switching valves of the servomechanisms are shifted to assume the driving valve position in a normal operation. If one of the servomechanisms is damaged, the switching valve of the damaged servomechanism is shifted to assume the bypassing valve position. If all of the servomechanisms are damaged, the switching valves of the damaged all servomechanisms are shifted to assume the damper valve position.