Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent
1981-07-02
1983-07-12
Rosenthal, Arnold
Valves and valve actuation
Permanent or constantly energized magnet actuator
251137, 251333, 251360, F16K 3108
Patent
active
043926320
ABSTRACT:
An axially magnetized cylindrical permanent magnet has a valve plug projection at one end for seating in a valve seat. It moves axially within a cavity, provided by two cup cores of ferromagnetic material, which is bisected by a medium ring that has an aperture allowing the permanent magnet to slide within it. Each cup core has a re-entrant central pole, one of which carries the valve seat and is bored to provide one valve port. Windings between the re-entrant poles and the core shells are concurrently energized in such a way as to produce like poles at the re-entrant pole faces, so that one will repel the permanent magnet and the other will attract it. A pulse of current is sufficient to open or close the valve and may be followed by a reverse pulse to brake the plug in order to reduce wear. The permanent magnet force holds the plug in either end positon when there is no current.
REFERENCES:
patent: 2912008 (1959-11-01), Blackburn
patent: 2983278 (1961-05-01), Heintz
patent: 3812841 (1974-05-01), Isaacson
patent: 3814376 (1974-06-01), Reinicke
patent: 4114648 (1978-09-01), Nakajima et al.
Binder Kurt
Gast Theodor
Robert & Bosch GmbH
Rosenthal Arnold
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