Solenoid valve with cushion between plunger and plunger stop
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United States of America Patent
Stats
-
Jul 22, 2003
Grant Date -
Feb 13, 2003
app pub date -
Aug 8, 2001
filing date -
Aug 8, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A solenoid valve includes an outlet tube and a plunger stop. A plunger is slidably disposed within the solenoid valve between the outlet tube and the plunger stop. The plunger is movable between a closed position wherein the plunger engages the outlet tube to block fluid flow there through and an open position wherein the plunger is distanced from the outlet tube to permit fluid flow there through. The plunger includes a plunger insert that forms a dome-shaped plunger stop cushion that, during opening of the valve at least partially contacts a flat plunger contact face formed by the plunger stop. The dome-shaped plunger stop cushion relatively effectively damps the impact between the plunger and the plunger stop by allowing the plunger insert material, e.g., rubber, to compress more and absorb more energy of the impact. Thus, signal noise caused by the solenoid valve is minimized.
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