Title:
双方向弁を備えたダブルアクション単式プランジャポンプ
Document Type and Number:
Japanese Patent JP4202911
Kind Code:
B2
Abstract:
A bi-directional fluid valve apparatus 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 the 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.
Inventors:
James E. Cook
Application Number:
JP2003505477A
Publication Date:
December 24, 2008
Filing Date:
June 17, 2002
Export Citation:
Assignee:
James E. Cook
International Classes:
F04B53/10; F16K15/00; F04B1/02; F04B39/10; F04B39/12; F04B53/16
Domestic Patent References:
| JP2000240830A | ||||
| JP3021512U |
Foreign References:
| EP0371407A2 | ||||
| US4350179 |
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita