Title:
【発明の名称】サイクリック油圧ポンプ
Document Type and Number:
Japanese Patent JPH08512375
Kind Code:
A
Abstract:
A two stage pump has coaxial first and second stage reciprocating pumps with the second stage piston reciprocably driven by the first stage piston. Multiple sets of first and second stage pumps are provided, and the second stage pistons can be returned by supercharge pressure, a loose connection between the first and second stage pistons, or a spring. An accumulator which is charged on a compression stroke and discharged on an intake stroke may also be provided in communication with a pumping chamber to improve the efficiency of a pump.
Inventors:
Prince, George Tee
Fisher, Mark Jay
Fisher, Mark Jay
Application Number:
JP51997194A
Publication Date:
December 24, 1996
Filing Date:
January 25, 1994
Export Citation:
Assignee:
Applied Power Incorporated
International Classes:
F04B1/047; F04B1/053; F04B5/00; F04B5/02; F04B11/00; F04B49/24; F04B1/04; (IPC1-7): F04B5/00; F04B1/04; F04B1/047; F04B1/053; F04B5/02; F04B11/00
Attorney, Agent or Firm:
Youhei Kinoshita