Title:
HYDRAULIC CIRCUIT
Document Type and Number:
Japanese Patent JP3752163
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve energy efficiency, and drive an actuator at a high speed.
SOLUTION: This hydraulic circuit is provided with a first variable pump, a second variable pump, an auxiliary hydraulic source connected to the second variable pump, an actuator connected to the first variable pump and the auxiliary hydraulic source, a control valve arranged between the actuator and the auxiliary hydraulic source, and a controlling portion 10 sending a command signal to the first and second variable pumps and the control valve. Oil discharged from the first variable pump and the auxiliary hydraulic source is joined to drive the actuator. The oil discharged from the first variable pump and the auxiliary hydraulic source is supplied to the actuator, response delay of the actuator can be decreased. Oil discharged from the first and second variable pumps is supplied to the actuator, so that energy efficiency can be improved.
Inventors:
Koyasu Itsuji
Application Number:
JP2001209566A
Publication Date:
March 08, 2006
Filing Date:
July 10, 2001
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
F15B1/02; F15B11/17; B29C45/82; F15B11/00; (IPC1-7): F15B11/17; B29C45/82; F15B1/02; F15B11/00
Domestic Patent References:
| JP6173903A | ||||
| JP7027101A | ||||
| JP6198697A | ||||
| JP474631A | ||||
| JP5991238A |
Attorney, Agent or Firm:
Makoto Kawai
Mamoru Shimizu
Toshiaki Aoki
Mamoru Shimizu
Toshiaki Aoki