Solenoid valve

Details Solenoid valve Solenoid valve

1984-08-21

1985-07-30

Jones, Larry

Valves and valve actuation

Fluid actuated or retarded

Dashpot or fluid controlled retarder or timer

251141, 251139, 251359, F16K 3112

Patent

active

045317089

ABSTRACT:
A solenoid valve includes a body (2,25) with an internal intake pipe (26) and an internal outlet pipe (27), a coil (4) and a movable stem (3), urged by a spring (10) toward a valve closed position. The stem (3) defines, with a seat (30), an annular sealing surface (22), surrounded by a groove (17) and by an annular flange (18). The flange defines with an annular counterpart (25) placed opposite, an annular damping surface (23). The groove (17) communicates with the outlet pipe (27) through a longitudinal slot (12) provided in the stem (3). The annular flange (18) is in a position near or in contact with the counterpart (25) when the valve is closed. During a closing of the valve, the liquid between the annular flange (18) and the counterpart (25) escapes radially through the groove (17) from the annular damping surface. This produces a braking effect on the stem (3), to reduce wear on the annular sealing surface (22).

REFERENCES:
patent: 557292 (1896-03-01), Turner
patent: 929007 (1907-07-01), Phillips
patent: 2407957 (1946-09-01), Hull-Ryde
patent: 2654560 (1953-10-01), Smith
patent: 2666614 (1954-01-01), Grove et al.
patent: 2688337 (1954-09-01), Shivers
patent: 3013768 (1961-12-01), La Mastra
patent: 3463257 (1969-08-01), Inomata et al.
patent: 4403765 (1983-09-01), Fisher

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