Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Patent
1993-10-26
1995-01-17
Nilson, Robert G.
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
F16K 31126
Patent
active
053819977
ABSTRACT:
A vent valve for a transport tank car is actuated by pressurized air from the tank cars brake system. The valve is opened by this pressurized air to permit flow of air, through a vent passageway, into or out of the tank. A bellows isolates the pressurized air system from the flow of air in the vent passage so that the braking air system will not be adversely affected by vapors from hazard products loaded in the tank.
REFERENCES:
patent: 4522369 (1985-06-01), Gemignani
patent: 4721283 (1988-01-01), Wilson
Anderson Todd W.
Fahl Richard L.
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