Title:
【発明の名称】電動式油圧工具
Document Type and Number:
Japanese Patent JP2761846
Kind Code:
B2
Abstract:
PURPOSE: To make it easy to use an electric hydraulic tool by way of miniaturizing and lightening it by screwing a front part of a power unit by way of forming a hollow part to open backward on a rear part of a tool body. CONSTITUTION: A pump plunger 2 is arranged on a tool body 1, a hydraulic circuit is internally provided, a hollow part 4 to open backward is formed on a rear part of the tool body 1, and a front part of a power unit 5 to drive the pump plunger 2 is inserted and installed in this hollow part 4. A return valve chamber 41 is doubly used for a discharge oil passage and a return oil passage of working oil by arranging it in the vertical direction in proximity of a cylinder chamber 8, a low pressure regulating valve and a high pressure regulating valve in the vertical direction are arranged left and right symmetrically on both sides of this return valve chamber 41 and the pump plunger 2 and an intake valve 36 in the vertical direction are arranged in the rear of the return valve chamber 41 respectively collectively on an upper surface by way of putting height of their head parts in order.
Inventors:
HIRABAYASHI SHIGERU
YASUI TADASHI
YASUI TADASHI
Application Number:
JP29501294A
Publication Date:
June 04, 1998
Filing Date:
November 29, 1994
Export Citation:
Assignee:
IZUMI SEIKI SEISAKUSHO KK
NIPPON DENCHI KK
NIPPON DENCHI KK
International Classes:
B25F5/00; B25B25/00; (IPC1-7): B25F5/00; B25B25/00
Domestic Patent References:
| JP631647A | ||||
| JP663283U | ||||
| JP2128855U | ||||
| JP2130769U |
Attorney, Agent or Firm:
Dozo Isono