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. 24, 1994
Filed:
Jun. 11, 1991
Abstract
Inflation pressure of an aircrew G-suit is set by a servo-pressure which controls movement of inflation gas supply and vent valves 126 and 127, respectively. Servo-pressure is regulated by a torque motor controlled valve 124, 125 which receives a servo-demand signal from an electronic control unit (ECU) 123. The ECU receives an inflation pressure demand signal P.sub.DEM from an aircraft systems computer 120 which stores schedules of G-suit inflation pressure against increasing acceleration and decreasing cabin ambient pressure. The computer is programmed to look-up and output the higher one of values for inflation pressure dependent upon values of acceleration signals G.sub.Z and cabin ambient pressure signals P.sub.AMB input to the computer by sensors 121 and 122, respectively. The ECU compares an existing G-suit inflation pressure P.sub.O signal with the inflation pressure demand signal and generates a compensated error signal which is combined with the inflation pressure demand signal to provide the servo-demand signal. The use of the ECU for the computationally intensive control task optimizes the use of the aircraft system computer. A combined breathing demand regulator and G-suit inflation pressure control valve which continues to function in the absence of electrical power after bail-out from an aircraft is also disclosed.