Title:
DOUBLE ACTING SIMPLEX PLUNGER PUMP WITH BI-DIRECTIONAL VALVES
Document Type and Number:
WIPO Patent Application WO2002103190
Kind Code:
A3
Abstract:
A bi-directional fluid valve apparatus 10 comprising a valve member adapted to co-act with an annular shoulder at the end of a fluid bore, the valve member having two axial ends. A flat surface on a first end having a diameter greater than that of the shoulder is positioned with the flat surface abutting the axial end surface of the shoulder. At least two axially extending and circumferentially spaced apart ribs are on the second axial end thereof, each of the ribs terminating in an end surface. The ribs are positioned so that end surfaces are in axial alignment with and spaced a preselected distance from, the axial end surface of the shoulder. Hollow coil spring means are positioned within the recesses in register with the bores, and having a first end engaging one of the shoulders, and a second end engaging the at least three circumferentially spaced apart ribs and the second axial end of the valve member.
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| JP4970639 | Piston pump |
Inventors:
COOK JAMES E (US)
Application Number:
PCT/US2002/019155
Publication Date:
May 30, 2003
Filing Date:
June 17, 2002
Export Citation:
Assignee:
COOK JAMES E (US)
International Classes:
F04B1/02; F04B39/10; F04B39/12; F16K15/00; F04B53/10; F04B53/16; (IPC1-7): F04B39/00; F04B39/10; F16K15/00
Foreign References:
| US4350179A | 1982-09-21 | |||
| US3664770A | 1972-05-23 | |||
| US3410477A | 1968-11-12 | |||
| US1003479A | 1911-09-19 | |||
| US5102312A | 1992-04-07 | |||
| US4026196A | 1977-05-31 | |||
| US4317468A | 1982-03-02 | |||
| US2002783A | 1935-05-28 |
Other References:
See also references of EP 1404971A4
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