EP 2094915 B1 20150527 - HYDRAULIC SYSTEM FOR IMPROVING FLATTING WORKABILITY IN AN EXCAVATOR
Title (en)
HYDRAULIC SYSTEM FOR IMPROVING FLATTING WORKABILITY IN AN EXCAVATOR
Title (de)
HYDRAULISCHES SYSTEM ZUR ERHÖHUNG DER STRECKFÄHIGKEIT IN EINEM BAGGER
Title (fr)
SYSTÈME HYDRAULIQUE AMÉLIORANT MANIABILITÉ D'UN EXCAVATEUR POUR L'APLANISSEMENT
Publication
Application
Priority
- KR 2007006754 W 20071221
- KR 20060133167 A 20061222
Abstract (en)
[origin: WO2008078930A1] Disclosed is a hydraulic system for an excavator, which is structurally improved so as to easily perform flatting work on a plain or inclined ground. A boom control valve has a fourth position on one side thereof such that a boom cylinder can be freely lifted and lowered by blocking a channel through which hydraulic operating fluid is supplied from a pump and by allowing hydraulic operating fluid inlet and outlet ports of the boom cylinder system to communicate with each other.
IPC 8 full level
E02F 9/20 (2006.01); E02F 3/43 (2006.01); E02F 9/22 (2006.01); F15B 13/02 (2006.01); F15B 13/04 (2006.01)
CPC (source: EP KR)
E02F 3/437 (2013.01 - EP); E02F 9/14 (2013.01 - KR); E02F 9/20 (2013.01 - KR); E02F 9/2203 (2013.01 - EP); E02F 9/2239 (2013.01 - EP); E02F 9/2267 (2013.01 - EP); E02F 9/2285 (2013.01 - EP); E02F 9/2292 (2013.01 - EP); F15B 13/021 (2013.01 - EP); F15B 2013/0413 (2013.01 - EP); F15B 2211/30595 (2013.01 - EP); F15B 2211/3122 (2013.01 - EP); F15B 2211/3133 (2013.01 - EP); F15B 2211/324 (2013.01 - EP); F15B 2211/327 (2013.01 - EP); F15B 2211/329 (2013.01 - EP); F15B 2211/355 (2013.01 - EP); F15B 2211/6355 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008078930 A1 20080703; CN 101573498 A 20091104; CN 101573498 B 20110615; EP 2094915 A1 20090902; EP 2094915 A4 20140402; EP 2094915 B1 20150527; KR 101265342 B1 20130520; KR 20080058939 A 20080626
DOCDB simple family (application)
KR 2007006754 W 20071221; CN 200780047719 A 20071221; EP 07851716 A 20071221; KR 20060133167 A 20061222