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Pump with coaxial inlet and outlet valve arrangement

  • US 4,032,263 A
  • Filed: 09/25/1975
  • Issued: 06/28/1977
  • Est. Priority Date: 09/25/1975
  • Status: Expired due to Term
First Claim
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1. Unitary inlet and outlet valve means for controlling flow of fluids to and from a pumping chamber having alternate suction and pressure cycles and comprising:

  • (a) housing means including a generally cylindrical sleeve body member with an inlet at one end and a flow chamber at the opposed end thereof and having an annular flange extending outwardly from said sleeve body member and generally enclosing said flow chamber, a bore formed within said sleeve body member and extending axially therethrough and a counterbore formed within said sleeve body member and terminating along an annular shoulder;

    with said flow chamber being disposed within said annular flange, and with said annular flange having spaced apart radially inwardly extending portions at opposed axial ends of said flow chamber and including first and second annular base surfaces with said first annular base surface being at the end of said housing means adjacent said flow chamber and forming one end wall thereof;

    (b) a first annular groove formed around the periphery of said counterbore at a point axially spaced from said flow chamber toward said inlet and having a first generally resilient snap-ring means received therewithin with the inner edge of said snap-ring means extending inwardly from said counterbore to form a first annular base pad;

    (c) a poppet valve seated against said annular shoulder, a cup-shaped spider means having radially outwardly extending arms seated upon the upper end of said first snap-ring means, a first valve spring disposed within said counterbore with one end of said first valve spring being seated against said spider means and the opposed end against the inner surface of said poppet valve;

    (d) said annular flange having a plurality of bores formed through a second annular base surface opposed from said first annular base surface, with said bores being in communication with said flow chamber adjacent the lower end of said first snap-ring means, an annular valve ring disposed coaxially about the outer periphery of said sleeve body member and seated against the upper surface of said flange to seal said flange bores;

    (e) a second annular groove formed about the outer periphery of said sleeve body member, a second snap-ring means disposed within said second annular groove and having a portion extending radially outwardly of said sleeve body member to form a second annular base pad, and second valve spring means being disposed and compressed between said second annular base pad and said annular valve ring.

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