F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
137/88
F15B 20/00 (2006.01) B64C 13/40 (2006.01)
Patent
CA 1037819
In re application of Robert D. Vanderlaan For "DIFFERENTIAL PRESSURE SENSING VALVE" ABSTRACT OF THE DISCLOSURE A differential pressure sensing valve has an axially shiftable spool including axially-spaced spool areas on which a pair of pressure sources connectable with such valve act in a predetermined direction with spool shifting force. Biasing means normally biases such spool with spool shifting force in a direction opposite to the predetermined direction. The op- posite spool shifting forces are substantially balanced over the normal operating range of the pressure sources for main- taining such spool in an operating position for normal flow of fluid through the valve. Such opposite spool shifting forces are substantially unbalanced for shifting such spool out of such operating position when the pressure sources substantially deviate from their normal operating range.
239041
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