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. 10, 2002
Filed:
Dec. 13, 2000
David J. Flavell, Tierra Verde, FL (US);
Moog Inc., East Aurora, NY (US);
Abstract
A redundant control actuation system ( ) provides hydraulic logic cross-coupling between physically-separate servoactuators ( A, B). Each servoactuator has a control valve ( A, B) arranged to provide a hydraulic output in response to a control signal. Each actuator also has a hydraulic actuator ( A, B) arranged to move a load in response to the hydraulic output from its associated control valve. Logic valve means ( A, A, A, B, B, B) are operatively associated with the control valves ( A, B) and actuators ( A, B). Each logic valve means is supplied with hydraulic and electrical input signals. Each logic valve means is operatively arranged between the associated control valve and actuator to either (a) permit control operation of the actuator in response to the control signal, (b) permit the actuator to move freely and independently of the control signal, or (c) restrain movement of the load independently of the control signal, as a function of the supplied input signals. Each logic valve means is operatively arranged to provide a hydraulic output signal. The hydraulic output signal of each servoactuator is provided as the hydraulic input signal to the other servoactuator.