Fluid handling – Systems – Flow path with serial valves and/or closures
Patent
1973-12-10
1977-07-05
Cohan, Alan
Fluid handling
Systems
Flow path with serial valves and/or closures
137503, 137517, F16K 1110
Patent
active
040333787
ABSTRACT:
A pressure reducing valve for use with compressed gas containers requiring fixed volumetric flow at regulated exhaust pressure regardless of pressure variation inside said container changing from initially high pressure value to eventually low final pressure value, consists of a spring loaded metering valve directly responsive to pressure load with a valving element comprising a needle inside control orifice for control of small quantity flow as regulated by relatively long conical stem travel, and a main valve of pin configuration inside valve nozzle exhaust port at one end subjected to pressurized gas for maintaining valve bubble tight shut, and at the other end protruding said exhaust port for valve actuation externally by pin depression for initiation of flow which terminates automatically when such depression is removed rendering valve closed and bubble tight by the pressure action over pin end exposed to compressed gas pressure, including a safety valve with self-locking tapers in valve seats and a pressure gage both conveniently mounted inside the boss of said gas container rendering a simple valving means within the requirements of regulating codes.
REFERENCES:
patent: 770913 (1904-09-01), Lord
patent: 805146 (1905-11-01), Lord
patent: 873984 (1907-12-01), Bobrick
patent: 886834 (1908-05-01), Michelin
patent: 1442140 (1923-01-01), Field
patent: 2472787 (1949-06-01), Brown
patent: 2754659 (1956-07-01), Dide
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