Title:
FLOWRATE CONTROLLING DEVICE
Document Type and Number:
Japanese Patent JPS5813203
Kind Code:
A
Abstract:
PURPOSE:To reduce the power consumption of a pump at the time of not being operated by a method wherein the pressure at the upstream side of orifice is operated by a regulator of variable capacity hydraulic pump and the flowrate of the pump is decreased by an increased pressure. CONSTITUTION:When either of each direction control valve 3a, 3a is in a neutral position and the actuator is not operated, the whole flowing amount of a pump 1 is flowed into a return circuit 12 through the compensator 9 of a flowrate controlling valve 4. In this occasion, as the pressure of the upstream side thereof goes up by action of orifice 14 arranged at the downstream side of the compensator 9, a regulator 6 moves to the side which the flowrate of the pump 1 is decreased by the pressure operated through a pilot pressure circuit 15 to reduce power consumption of the pump 1.
Inventors:
ISHIZAKI KENJI
Application Number:
JP11086881A
Publication Date:
January 25, 1983
Filing Date:
July 17, 1981
Export Citation:
Assignee:
UCHIDA YUATSU KIKI KOGYO KK
International Classes:
F15B11/00; F04B49/00; F15B11/16; (IPC1-7): F04B49/00; F15B11/00
Attorney, Agent or Firm:
Kinichi Kitamura