Title:
OPERATING VALVE HAVING REGENERATING FUNCTION
Document Type and Number:
Japanese Patent JP3534320
Kind Code:
B2
Abstract:
PURPOSE: To realize regenerating function in an operating valve having one pump port and first and second load pressure detecting ports.
CONSTITUTION: A regenerating port 29 is formed between a first load pressure detecting port 23 and a first actuator port 25, a regenerating small diameter part 34 is formed on a spool 30, the first load pressure detecting port 23 is communicated with the regenerating port 29 through the regenerating small diameter part 34 when the spool 30 is positioned in its neutral position, and the regenerating port 29 is communicated with the first actuator port 25 through the regenerating small diameter part 34 on the first load pressure detecting port 23 when the spool 30 is positioned in a first pressure oil supply position. The first actuator port 25 is communicated with the regenerating port 29 through the regenerating small diameter part 34 when the spool 30 is positioned in a second pressure oil supply position, and this regenerating port 29 is communicated with a second load pressure detecting port 24 through a revers flow preventing valve.
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Inventors:
Takano, Toshio
Akashi, Mitsumasa
Akashi, Mitsumasa
Application Number:
JP2663394A
Publication Date:
June 07, 2004
Filing Date:
February 24, 1994
Export Citation:
Assignee:
KOMATSU LTD
International Classes:
E02F9/22; F15B11/024; F15B13/02; F15B21/14; (IPC1-7): F15B11/024; E02F9/22
Attorney, Agent or Firm:
米原 正章 （外２名）