Title:
ROTARY HYDRAULIC CIRCUIT
Document Type and Number:
Japanese Patent JPH06173904
Kind Code:
A
Abstract:
PURPOSE: To accelerate or decelerate regardless of the magnitude of the pump discharge quantity and load.
CONSTITUTION: A rotary hydraulic circuit is provided with a direction selector valve 22 feeding the discharge pressure oil of a hydraulic pump 20 to a rotary hydraulic motor 27, a pilot valve 33 selectively operating the spool 30 of the direction selector valve 22, and a relief valve 21 controlling the pressure of the discharge pressure oil of the hydraulic pump 20 with the pilot pressure of the pilot valve 33. The pressure compensation type flow control function is provided on the meter-out side so that no flow force is generated on the meter-in side of the direction selector valve 22 and flow force is generated on the meter-out side.
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Inventors:
OKI ISAO
Application Number:
JP32783192A
Publication Date:
June 21, 1994
Filing Date:
December 08, 1992
Export Citation:
Assignee:
KOMATSU MFG CO LTD
International Classes:
E02F9/12; E02F9/22; F15B11/04; F15B11/08; B66C23/86; (IPC1-7): F15B11/04; B66C23/86; E02F9/22; F15B11/08
Attorney, Agent or Firm:
Masaaki Yonehara (2 others)