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Solenoid latching valve

  • US 5,584,465 A
  • Filed: 12/07/1993
  • Issued: 12/17/1996
  • Est. Priority Date: 12/07/1993
  • Status: Expired due to Term
First Claim
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1. A solenoid latching valve comprising a body, said body including an inlet, an outlet, a plunger, a plunger guide, said plunger guide including a stop and a flange, a retaining nut, said retaining nut engaging said flange of said plunger guide prohibiting movement of said plunger guide with respect to said body, said plunger residing within said plunger guide and said body, a bobbin, an electromagnetic coil, said electromagnetic coil residing around said bobbin, said bobbin residing around said plunger guide, a housing, said housing residing around said electromagnetic coil and said bobbin, a magnet, a washer and a retaining ring, said retaining ring prohibiting movement of said washer, housing and magnet, a spring, said spring interposed between said plunger stop and said plunger, said plunger movable between first and second positions, said spring urging said plunger toward said first position, said plunger in said first position isolates said inlet from said outlet, said plunger in said second position permits communication between said inlet and outlet, said magnet urging said plunger toward, but not to, said second position of said plunger, a first electrical current having a first direction in said electromagnetic coil, said magnet in combination with said first electrical current having a first direction in said electromagnetic coil magnetically urge said plunger to said second position and against said stop of said plunger permitting communication between said inlet and outlet, a second electrical current having a second direction in said electromagnetic coil, said second direction of said second electrical current being opposite to said first direction of said first electrical current, said second electrical current in said electromagnetic coil in combination with said spring, magnetically and mechanically, respectively, urge said plunger to said first position prohibiting communication between said inlet and outlet ports.

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