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Proportional solenoid valve

  • US 4,522,371 A
  • Filed: 06/20/1983
  • Issued: 06/11/1985
  • Est. Priority Date: 06/20/1983
  • Status: Expired due to Term
First Claim
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1. An electromagnetic valve assembly having a first member of magnetic material with a top and a bottom;

  • a top member of magnetic material, affixed near the top of the first member;

    a center member of magnetic material extending through said top member;

    a seat extending beyond the center member;

    a base member, attached to the bottom of the first member, to define a chamber adjacent the seat;

    a magnetic closure member, positioned within the chamber at a predetermined distance from said seat which, with the first member, the top member and the center member, completes a flux path including an air gap defined between the magnetic closure member and the center member; and

    means for establishing the flow of electromagnetic flux through said flux path;

    said first member defines an extension extending above said top member, said top member having at least two portions, at least one of said top member portions being movable relative to said other portion, and defining an aperture to receive said extension and a channel to receive a securing means;

    wherein said movable portion is movable about said extension to vary the reluctance in the electromagnetic flux path.

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