Title:
HYDRAULIC DEVICE OF EARTH WORK VEHICLE
Document Type and Number:
Japanese Patent JP3217248
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make the best use of the output of an engine since a pressure drop in a pipeline consumes the output of the engine when a work machine is not used.
SOLUTION: When a main valve 15 is not operated or slightly operated, a low pressure unloading valve 24 is provided so as to return the whole quantity of a hydraulic fluid, which is discharged from a main pump 11 to a main hydraulic circuit 14, to a tank 23 while the hydraulic fluid of a steering pump is sent to the main valve 15, thereby operating the valve 15. The construction makes it possible to eliminate waste attributable to piping resistance of the hydraulic fluid discharged from the main pump 11.
Inventors:
Shuji Konno
Application Number:
JP26372895A
Publication Date:
October 09, 2001
Filing Date:
October 12, 1995
Export Citation:
Assignee:
TCM Co., Ltd.
International Classes:
E02F9/22; E02F3/43; F15B11/02; (IPC1-7): E02F9/22; E02F3/43; F15B11/02
Domestic Patent References:
| JP56113699A | ||||
| JP5961198U | ||||
| JP6325802U | ||||
| JP280699U |
Attorney, Agent or Firm:
Yoshihiro Morimoto
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