EP 1416096 A1 20040506 - Hydraulic excavator with a hydraulic circuit
Title (en)
Hydraulic excavator with a hydraulic circuit
Title (de)
Hydraulikbagger mit Hydraulikkreis
Title (fr)
Pelle hydraulique avec un circuit hydraulique
Publication
Application
Priority
JP 2002318556 A 20021031
Abstract (en)
A pilot pressure control device reduces a pilot pressure fed to the bucket digging-side pilot port of a bucket control valve (4) according to the amount of boom raising operation, when the boom raising operation and bucket digging operation are performed simultaneously. The bucket control valve is operated by pilot pressure proportional to the amount of operation of a remote control valve (10).
IPC 1-7
IPC 8 full level
E02F 9/22 (2006.01); F15B 11/02 (2006.01); F15B 11/08 (2006.01); F15B 11/16 (2006.01); F15B 11/17 (2006.01)
CPC (source: EP)
E02F 9/2228 (2013.01); E02F 9/2235 (2013.01); E02F 9/2242 (2013.01); E02F 9/226 (2013.01); E02F 9/2285 (2013.01); E02F 9/2292 (2013.01); E02F 9/2296 (2013.01); F15B 11/162 (2013.01); F15B 11/166 (2013.01); F15B 11/167 (2013.01); F15B 2211/20546 (2013.01); F15B 2211/30565 (2013.01); F15B 2211/30595 (2013.01); F15B 2211/3116 (2013.01); F15B 2211/329 (2013.01); F15B 2211/575 (2013.01); F15B 2211/6309 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/6316 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/71 (2013.01); F15B 2211/76 (2013.01); F15B 2211/78 (2013.01)
Citation (search report)
- [PX] WO 03069164 A1 20030821 - CATERPILLAR MITSUBISHI LTD [JP], et al
- [YDA] EP 0715029 A1 19960605 - HITACHI CONSTRUCTION MACHINERY [JP]
- [YA] DE 10047175 A1 20020411 - MANNESMANN REXROTH AG [DE]
- [PA] WO 02093017 A1 20021121 - CATERPILLAR MITSUBISHI LTD [JP], et al & US 0172650 A1
- [A] EP 1172488 A1 20020116 - CATERPILLAR MITSUBISHI LTD [JP]
- [Y] PATENT ABSTRACTS OF JAPAN vol. 013, no. 593 (M - 914) 27 December 1989 (1989-12-27)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1416096 A1 20040506; EP 1416096 B1 20101006; AT E483861 T1 20101015; DE 60334430 D1 20101118; JP 2004150198 A 20040527; JP 3818252 B2 20060906
DOCDB simple family (application)
EP 03256761 A 20031027; AT 03256761 T 20031027; DE 60334430 T 20031027; JP 2002318556 A 20021031