Title:
TWO PUMP TYPE LOAD SENSITIVE CIRCUIT
Document Type and Number:
Japanese Patent JP3195095
Kind Code:
B2
Abstract:
PURPOSE: To prevent reversing-flow from a first variable discharging amount pump to a second variable discharging amount pump, and control discharging pressure of both pumps according to load pressure of first and second actuators.
CONSTITUTION: A first actuator 11 and a first variable discharging amount pump P1 are connected to each other through a switch valve 1. Also, a second actuator 19 and a second variable discharging amount pump P2 are connected to each other through a switching valve 18. Both pumps P1, P2 are connected to each other through a confluent valve 31. First and second pilot passages 12, 23 for leading load pressures of both actuators 11, 19 are connected to each other through the confluent valve 31. Furthermore, a shut-off valve 36 is provided between the confluent valve 31 and the second variable discharging amount pump P2.
Inventors:
Hisato Naito
Makoto Yamamura
Yoshitake Yonekubo
Makoto Yamamura
Yoshitake Yonekubo
Application Number:
JP35999092A
Publication Date:
August 06, 2001
Filing Date:
December 28, 1992
Export Citation:
Assignee:
Kayaba Industry Co., Ltd.
International Classes:
F04B23/04; F04B49/00; F04B49/02; F15B11/00; F15B11/05; F15B11/16; F15B11/17; (IPC1-7): F15B11/00; F15B11/17
Domestic Patent References:
| JP57116965A | ||||
| JP3260401A | ||||
| JP384204A |
Attorney, Agent or Firm:
Nobuyuki Shima