Fluid handling – Liquid level responsive or maintaining systems – With second diverse control
Patent
1983-09-30
1985-09-24
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
With second diverse control
137414, 137426, 251 28, F16K 3134, F16K 3300
Patent
active
045427658
ABSTRACT:
A pneumatic control providing both a snap action mode and a throttling mode, action including a gas inlet connected to a source of gas pressure, a nozzle in communication with an exhaust port, a nozzle seat moveable to and away from the nozzle in response to a mechanically applied control action such as a liquid level float, a gas chamber in the flow passageway between the gas inlet and the nozzle port, a first passageway from the gas chamber to a control gas outlet, a diaphragm actuated valve in the first passageway, a second passageway from the gas chamber to the control gas outlet, a throttling screw serving to open or close the second passageway and a shut-off screw providing means of opening or closing the first passageway whereby the application of gas pressure to the control port in response to the closing of the nozzle is determined by the position of the throttling screw and the shut-off screw.
REFERENCES:
patent: 2649771 (1953-08-01), Parks
patent: 3088485 (1963-05-01), Hanssen
patent: 3120241 (1964-02-01), Parks
patent: 3413997 (1968-12-01), Taylor
patent: 3840044 (1974-10-01), Harris et al.
Alberty Randall W.
Glasgow Clarence
Custom Engineering and Manufacturing Corp.
Walton George L.
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