EP 0553347 A4 19930302 - HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINERY.
Title (en)
HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINERY.
Title (de)
HYDRAULISCHE ANTREIBSVORRICHTUNG FÜR BAUMASCHINEN.
Title (fr)
DISPOSITIF DE COMMANDE HYDRAULIQUE POUR ENGINS DE CHANTIER.
Publication
Application
Priority
JP 9000195 W 19900220
Abstract (en)
[origin: WO9113218A1] This invention relates to a hydraulic driving device of a travelling machine or working machine in construction machinery such as a power shovel, a shovel bulldozer, a bulldozer, and so forth. The device includes a hydraulic driving mechanism actuated by oil pressure, a means for supplying the oil pressure to an oil pressure piping arrangement system for this hydraulic driving mechanism and a means for controlling this oil pressure supply means and lowering the oil pressure supply speed in the oil pressure piping arrangement system and based on the oil pressure supply in a predetermined zone after a dead zone in which the oil pressure rises. Accordingly, while the delay of the operation of the hydraulic driving mechanism is prevented, the shock at the start and stop can be prevented.
IPC 1-7
IPC 8 full level
E02F 9/22 (2006.01)
CPC (source: EP)
E02F 9/2221 (2013.01); E02F 9/226 (2013.01); E02F 9/2296 (2013.01)
Citation (search report)
- [A] PATENT ABSTRACTS OF JAPAN vol. 013, no. 189 (M-821)8 May 1989 & JP-A-01 015 568 ( KOBE STEEL LTD. ) 19 January 1989
- [E] PATENT ABSTRACTS OF JAPAN vol. 014, no. 335 (M-1000)(4278) 19 January 1990 & JP-A-02 115 421 ( KOMATSU LTD. ) 27 February 1990
- See references of WO 9113218A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
WO 9113218 A1 19910905; DE 69030507 D1 19970522; DE 69030507 T2 19970925; EP 0553347 A1 19930804; EP 0553347 A4 19930302; EP 0553347 B1 19970416
DOCDB simple family (application)
JP 9000195 W 19900220; DE 69030507 T 19900220; EP 90903215 A 19900220