Solenoid valve

Details Solenoid valve Solenoid valve

1990-04-30

1991-07-09

Rosenthal, Arnold

Valves and valve actuation

Permanent or constantly energized magnet actuator

25112919, 25112918, F16K 3108

Patent

active

050298070

ABSTRACT:
A valve for sealing a conduit under pressure has an armature (12) cooperating with two springs, a permanent magnet, and a solenoid coil. The force of the permanent magnet is used to cock a spring and thereby stored primarily as a spring force when the valve is in any of its two end positions. THe spring force is slightly smaller than the permanent magnetic force of the permanent magnet, and this slightly smaller spring force is effective on a valve stem through a sleeve in a direction opposite to that of the permanent magnetic force. The permanent magnetic force is, for example, stored in a Belleville spring and additionally in a helical or conical spring which provides an extra valve biasing force. In order to open the valve, the solenoid coil (9) of an electromagnet is energized to counteract the force of the permanent magnet to an extent slightly below the stored spring force. Thus, this valve is capable of having a monostable or a bistable characteristic, depending on the adjustment of the spring force with the aid of an adjustment ring engaging a threading on the valve stem.

REFERENCES:
patent: 4056255 (1977-11-01), Lace
patent: 4299252 (1981-11-01), Reinicke
patent: 4392634 (1983-07-01), Kita
patent: 4605197 (1986-08-01), Casey et al.

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