Title:
FLUID PRESSURE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/198579
Kind Code:
A1
Abstract:
Provided is a low cost fluid pressure circuit which can, using a fixed displacement pump, smoothly control a fluid pressure actuator in response to an operation command, and which can effectively use energy. A fluid circuit (130) is provided with: a directional control valve (4) disposed between a fixed displacement pump (2) and a fluid pressure actuator (5) and switching between flow passages for a pressurized fluid; an accumulator (27) provided in a branch flow passage (29, 30) branching from a connection flow passage (23) which connects the fluid pressure actuator and the directional control valve; an accumulator flow rate control valve (26) which is disposed between the connection flow passage and the accumulator; and a pump flow rate control valve (40) which is disposed between the fluid pressure actuator and the fixed displacement pump and by which a pressurized fluid discharged from the fixed displacement pump is diverted in a flow rate-variable manner into two systems, which are a tank-side system and a fluid pressure actuator-side system.
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Inventors:
SHIMADA Yoshiyuki (C/O Eagle Industry Co. Ltd, 1-12-15, Shiba-Daimon, Minato-k, Tokyo 87, 〒1058587, JP)
Application Number:
JP2019/014728
Publication Date:
October 17, 2019
Filing Date:
April 03, 2019
Export Citation:
Assignee:
EAGLE INDUSTRY CO., LTD. (1-12-15, Shiba-Daimon Minato-k, Tokyo 87, 〒1058587, JP)
International Classes:
F15B11/042; E02F9/22; F15B21/14
Foreign References:
| JP2008089024A | 2008-04-17 | |||
| JPS6246002A | 1987-02-27 | |||
| JP2005308126A | 2005-11-04 | |||
| JP2006308077A | 2006-11-09 | |||
| JP2017015130A | 2017-01-19 |
Attorney, Agent or Firm:
SHIGENOBU Kazuo et al. (19F Garden Court, 4-1 Kioi-cho, Chiyoda-k, Tokyo 78, 〒1028578, JP)
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