Title:
HYDRAULIC CIRCUIT FOR WORK VEHICLE
Document Type and Number:
Japanese Patent JP3802989
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent a shift shock by mis-operation so as to improve a comfortable feeling and safety of an operator, by a simple hydraulic circuit.
SOLUTION: This hydraulic circuit is provided with a respective selector valve 2, 12, 17 switching delivery oil of each oil hydraulic pump 1, 11, 16 to a selector valve 7, 13, 18 of each actuator 8, 14, 19 and a confluent pipe line 4, respective fixed set pressure relief valve 9, 15, 20 interposed between each hydraulic pump 1, 11, 16 and the respective selector valve 2, 12, 17, and a respective check valve 3a, 3b interposed in a connection pipe line between the selector valve 2, 12 except the selector valve 17 having in the upstream the fixed set pressure relief valve 20 of the highest set pressure of a plurality of the fixed set pressure relief valves 9, 15, 20 and the confluent pipe line 4 to permit a flow in a direction of the confluent pipe line 4.
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Inventors:
Takahide Takiguchi
Application Number:
JP33208498A
Publication Date:
August 02, 2006
Filing Date:
November 06, 1998
Export Citation:
Assignee:
KOMATSU LTD.
International Classes:
E02F9/22; F15B11/17; B66C13/12; (IPC1-7): F15B11/17; B66C13/12; E02F9/22
Domestic Patent References:
| JP7003726U | ||||
| JP58041126A | ||||
| JP54073402A | ||||
| JP56006901A | ||||
| JP62165003A | ||||
| JP54068095U | ||||
| JP63026402A | ||||
| JP54151070U | ||||
| JP60179504A |