Motors: expansible chamber type – Working member position responsive motive fluid control – Venting expanding chamber
Patent
1986-01-23
1988-04-12
Michalsky, Gerald A.
Motors: expansible chamber type
Working member position responsive motive fluid control
Venting expanding chamber
91 52, 91405, 137556, 251 14, 251 28, 251 33, 251 35, 251 614, 210108, F15B 13042, F16K 31365
Patent
active
047366710
ABSTRACT:
A fluid pressure control device is described effective to actuate an external device when the differential-pressure between a high-pressure fluid source and a lower pressure fluid source rises to a predetermined magnitude. The control device comprises a housing having a partition wall therein dividing its interior into two compartments communicating with each other through an opening in the partition wall. A differential-pressure sensing member is disposed in one of the compartments and is movable therein in response to the sensed differential-pressure. A stem is fixed to the differential-pressure sensing member so as to be moved therewith and carries a valve member at one end for moving it with respect to the valve opening to control the flow of the fluid therethrough and thereby to actuate the external device.
REFERENCES:
patent: 2320011 (1943-05-01), Reynolds
patent: 4036433 (1977-07-01), Wagner et al.
patent: 4278540 (1981-07-01), Drori
patent: 4450861 (1984-05-01), Bouteille
Barish Benjamin J.
Michalsky Gerald A.
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