Title:
RETURN FLOW RATE SHARING CIRCUIT FOR PRESSURE OIL FEED DEVICE
Document Type and Number:
Japanese Patent JPH0754805
Kind Code:
A
Abstract:
PURPOSE: To reduce a pressure loss when a large flow rate is discharged to a tank from a specific hydraulic actuator without enlarging a directional control valve.
CONSTITUTION: Discharge pressure oil of a hydraulic pump 10 is fed to a plurality of hydraulic actuators 16 by directional control valves 15 and pressure compensation valves 18, and an auxiliary directional control valve 30 is provided for discharging return oil of a specific hydraulic actuator 16 to a tank. The return oil of the specific hydraulic actuator 16 is discharged to the tank by means of the auxiliary directional control valve 30 and the directional control valve 15.
Inventors:
YOSHIDA NOBUSANE
KARAKAMA TADAO
HONDA NOBUHISA
KARAKAMA TADAO
HONDA NOBUHISA
Application Number:
JP20161393A
Publication Date:
February 28, 1995
Filing Date:
August 13, 1993
Export Citation:
Assignee:
KOMATSU MFG CO LTD
International Classes:
E02F9/22; F15B11/00; F15B11/05; (IPC1-7): F15B11/00; E02F9/22; F15B11/05
Domestic Patent References:
| JPS5744224U | 1982-03-11 | |||
| JP2003139221A | 2003-05-14 | |||
| JP2005241946A | 2005-09-08 | |||
| JP2000214646A | 2000-08-04 | |||
| JP2010256766A | 2010-11-11 | |||
| JPH0527765U | 1993-04-09 | |||
| JP2007240007A | 2007-09-20 | |||
| JP2007147881A | 2007-06-14 | |||
| JP2006072160A | 2006-03-16 | |||
| JP2009058735A | 2009-03-19 |
Attorney, Agent or Firm:
Masaaki Yonehara (2 others)
Next Patent: 測量機の測角装置に用いられるエンコーダ板支持構造