Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1975-06-05
1978-04-18
Halvosa, George E. A.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
188314, 188318, 188322, 277 59, 416106, F16F 920
Patent
active
040846687
ABSTRACT:
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.
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patent: 3514114 (1970-05-01), Monahan
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patent: 3810659 (1974-05-01), Marcil
patent: 3925987 (1975-12-01), Faisandier
patent: 3943717 (1976-03-01), Schexnayder
Halvosa George E. A.
Hauschild Vernon F.
United Technologies Corporation
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