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

• Current Assignee: HY-PRO Corporation (Donaldson Company Incorporated)
• Original Assignee: Lear Siegler, Inc. (LSS Holdings LLC)
• Inventors: Pareja, Ramon
• Primary Examiner(s): Freeh, William L.
• Application Number:
  US05/616,553
• Time in Patent Office: 642 Days
• Field of Search: 417/558, 417/454, 417/269, 417/273, 417/571, 417/564, 417/563, 137/493.8, 137/493.9
• US Class Current: 417/539
• CPC Class Codes: C01F 5/02 Magnesia
• CPC Class Codes: F04B 1/00 Multi-cylinder machines or pumps characterised by number or arrangement of cylinders machines or pumps with pistons coacting within one cylinder F04B3/00
• CPC Class Codes: F04B 53/109 inlet and outlet valve forming one unit
• CPC Class Codes: F04B 9/045 the means being eccentrics
• CPC Class Codes: Y10T 137/7779 Axes of ports parallel

Abstract

A unitary inlet and outlet valve means for fluid flow control comprising a unitary body in the form of a hollow sleeve having coaxially arranged inlet and outlet valves. The sleeve housing means includes an inlet at one end thereof, and a flow chamber at the opposed end thereof, and with an annular flange extending outwardly from the sleeve adjacent the flow chamber. The central bore through the sleeve member provides a housing and seat for the inlet poppet, and an annular spring-biased ring controls fluid flow through bores formed in the flange and communicating between the flange and the flow chamber. The individual valves open upon opposed inwardly directed movement, thereby shortening the overall length of the valve body.

Claims

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.

2. The unitary inlet and outlet valve means as defined in claim 1 being particularly characterized in that said annular flanged spring retainer is disposed between said second valve spring and said second annular base pad.

3. The unitary inlet and outlet valve means as defined in claim 1 wherein said flow chamber is adapted to receive a portion of a reciprocating pumping member therewithin.

4. The unitary inlet and outlet valve means as defined in claim 1 wherein said spider means is formed with a valve spring guiding projection centrally thereof.