Diaphragmatic electromagnetic valve with leakage preventing conv

Details Diaphragmatic electromagnetic valve with leakage preventing conv Diaphragmatic electromagnetic valve with leakage preventing conv

1991-02-13

1992-05-26

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Including solenoid

251332, 251333, 1374545, F16K 3106

Patent

active

051160200

ABSTRACT:
An electromagnetic diaphragm-type valve has a leakage preventing convex ring and is particularly applicable to air-aided fuel injection system. The valve includes an external housing made of a magnetic-inductive material, an electromagnetic coil set installed inside the rear part of external housing, a magnetic-inductive stator fitted to the central holding site of electromagnetic coil set, and a valve stem installed in the front part of external housing. The valve stem circumference is integrated with a deflectable rubber diaphragm so as not only to enable the valve stem to move a minor distance but also to enable the valve stem to be located in a right or left position. In addition, the diaphragm isolates an air chamber from parts defining the ranges of guidance and lift of valve stem, hence the motion of valve stem is not affected by entrance of pollutants. The diaphragm is formed to seal in compresed air in the air chamber. Effective sealing is achieved because the metal end surface of the valve stem contacts the valve seat by a metal end rubber convex ring. Simultaneously, metal contact between the valve stem and the valve seat prevents serious distortion of rubber and therefore makes the electromagnetic valve highly durable.

REFERENCES:
patent: 4455982 (1984-06-01), Hafner et al.
patent: 4582294 (1986-04-01), Fargo
patent: 5007458 (1991-04-01), Marcus et al.

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