F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
137/80, 138/96
F04B 11/00 (2006.01) B64C 27/51 (2006.01) F16F 9/20 (2006.01) F16F 9/32 (2006.01) F16J 15/00 (2006.01)
Patent
CA 1045947
ABSTRACT OF THE DISCLOSURE A cylinder-and-piston type hydraulic damper has spaced dual seals on its piston rods to provide annular cavities between seals. A fluid leakage line connects said cavities to the closed reservoir of a fluid leakage indicator which consists of a cylinder closed by a spring biased diaphragm which carries the indicating member of the indicator. The damper chambers on opposite sides of the piston are alternately supplied with fluid from the reservoir during operation of the damper by means of a shuttle valve, thus providing a closed and sealed fluid system including redundant seals with means for indicating that the damper needs servicing upon a predetermined loss of fluid from the reservoir. -1-
253720
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