Electricity: circuit makers and breakers – Fluid pressure – Diaphragm
Patent
1981-10-26
1984-05-01
Tolin, G. P.
Electricity: circuit makers and breakers
Fluid pressure
Diaphragm
200 81R, 200 819R, 92 92, 7386147, H01H 3534
Patent
active
044463448
ABSTRACT:
Apparatus and method are disclosed for actuating a desired device, such as a switch controlling a pump, in response to a predetermined pressure condition in a selected environment of varying pressure, such as closed vessel. A tube having a flattened segment of deformable material is disposed in fluid communication with the selected environment and a flattened segment of the tube is inserted between a tube support surface and a movable tube segment compression member. When the flattened tube segment expands in response to an increased pressure condition within the monitored environment, the tube segment compression member moves to actuate the device.
The flattened tube segment unexpectedly improves the precision and consistency in actuating the device exactly at the predetermined pressure condition.
REFERENCES:
patent: 2885506 (1959-05-01), Anderson
patent: 3423551 (1969-01-01), Starbuck
patent: 3424883 (1969-01-01), Heskett
patent: 3456086 (1969-07-01), Asku
patent: 3529106 (1970-09-01), Little, Jr.
patent: 3569649 (1971-03-01), Spielbauer
patent: 3636289 (1972-01-01), Possell
patent: 3827828 (1974-08-01), Edwards
patent: 4212591 (1980-07-01), Lamontagne
International Freezer Corp.
Tolin G. P.
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