Title:
LOAD-SENSING TYPE OIL PRESSURE CONTROL DEVICE
Document Type and Number:
Japanese Patent JP3440105
Kind Code:
B2
Abstract:
PURPOSE: To offer a load-sensoring type oil pressure control device which does not change the steering feeling when an actuator is moved slowly or when the load pressure of the actuator is raised.
CONSTITUTION: With regard to an oil pressure circuit which controls the discharge quantity of a variable discharge pump P in response to the pressure in a neutral circuit located downstream from a switching valve 14 of a center opened type, meter-in restrictors 15, 16 are provided in the switching position of the switching valve 14 and a pressure detector 18 connected to a controller 13 is provided downstream from the meter-in restrictors 15, 16. Further, a variable restrictor 19 connected to the controller 13 is provided downstream from the switching valve 14 and a pressure detector 22 connected to the controller 13 is provided downstream from the variable restrictor 19 while the controller 13 is connected to the variable discharge pump P.
Inventors:
Masahiko Ohzeki
Yoneaki Takahashi
Atsushi Fujii
Haruhiko Kawasaki
Ikigata Haruki
Yoneaki Takahashi
Atsushi Fujii
Haruhiko Kawasaki
Ikigata Haruki
Application Number:
JP29071692A
Publication Date:
August 25, 2003
Filing Date:
October 05, 1992
Export Citation:
Assignee:
Kayaba Industry Co., Ltd.
International Classes:
E02F9/22; F15B11/00; (IPC1-7): F15B11/00; E02F9/22
Domestic Patent References:
| JP4131510A | ||||
| JP62160334A | ||||
| JP396404U | ||||
| JP630502U | ||||
| JP628305U |
Attorney, Agent or Firm:
Nobuyuki Shima
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