Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent
1986-11-24
1988-12-20
Rosenthal, Arnold
Valves and valve actuation
Permanent or constantly energized magnet actuator
137582, 137519, 137460, F16K 3108
Patent
active
047921137
ABSTRACT:
A flow limit valve for limiting the flow rate of a pressurized fluid includes a valve body with an interconnecting cavity of circular cross section. Within the cavity is a piston that slides within the cavity under force generated by a pressure differential across the piston to a closed position in engagement with a seat at the end of the cavity. A first encapsulated magnet is carried within the valve body in a chamber located on the side of the seat opposite the cavity. The first encapsulated magnet can be moved in response to another magnet outside the valve body to move a pin which can extend through the seat when the piston is in a closed position to thereby move the piston to an open position. The magnetic forces applied through the valve body affect internal valve operation via the pin and thus avoids the dange of noxious fluids escaping through sliding seals or flexible membranes.
REFERENCES:
patent: 3326233 (1967-06-01), Perruzzi
patent: 3877478 (1975-04-01), Lougworth
patent: 4178958 (1979-12-01), Palav
patent: 4223692 (1980-09-01), Perry
patent: 4548047 (1985-10-01), Hayaski
Integrated Flow Systems, Inc.
Rosenthal Arnold
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