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Patent Searching and Data


Title:
HYDRAULIC PUMP CIRCUIT FOR WHEEL LOADER
Document Type and Number:
Japanese Patent JPH11181842
Kind Code:
A
Abstract:

To provide a hydraulic pump circuit for a wheel loader capable of reducing an incongruous sence in running operation while reducing loss in hydraulic horsepower.

A hydraulic pump circuit for a wheel has an accelerator pedal for controlling engine rotation, a traveling device driven by engine horsepower, and a hydraulic type working equipment driven by receiving oil pressure from a hydraulic pump driven by engine horsepower. In this case, a plurality of hydraulic pumps (Pw1, Pw2,..., Po1, Po2...) are provided; and a plurality of units of these are hydraulic pumps (Pw1, Pw2,..., Po1, Po2,...) and a plurality of units of these hydraulic pumps (Pw1, Pw2,...Po1, Po2,...) are the hydraulic pumps which are cut-off or unloaded by either one of or both of cut-off pressures (P21, P22,...), which differ each other, the unload pressure (P11, P12,...).


Inventors:
AKIMOTO TAKAO
Application Number:
JP36454897A
Publication Date:
July 06, 1999
Filing Date:
December 18, 1997
Export Citation:
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Assignee:
KOMATSU MFG CO LTD
International Classes:
E02F9/22; B60K25/04; B62D5/07; F15B11/00; (IPC1-7): E02F9/22; B60K25/04; B62D5/07; F15B11/00
Attorney, Agent or Firm:
Yoshihiko Hashizume