EP 1211359 A4 20061213 - BOOM CYLINDER CONTROL CIRCUIT OF WORKING MACHINE
Title (en)
BOOM CYLINDER CONTROL CIRCUIT OF WORKING MACHINE
Title (de)
STEUERANLAGE FÜR EINEN AUSLEGERZYLINDER EINER BAUMASCHINE
Title (fr)
CIRCUIT DE COMMANDE DE VERIN DE FLECHE DE MACHINE DE CHANTIER
Publication
Application
Priority
- JP 0006005 W 20000904
- JP 2000076002 A 20000317
Abstract (en)
[origin: EP1211359A1] The invention provides a boom cylinder control circuit of a working machine which makes boom operations easy when stone crushing operations by means of a breaker or operations to move a bucket back and forth along the ground are performed, wherein a control circuit of a boom cylinder 10 is provided with a lowering side oil discharging passage E and a rising side oil discharging passage F which allow oil of an oil chamber on the head side 10b and an oil chamber on the rod side 10a of the boom cylinder to flow toward an oil reservoir 12 without passing through a control valve 13 and a second solenoid vale 21 and a third solenoid valve 22 which act to open and close these oil discharging passages, respectively. <IMAGE>
IPC 1-7
IPC 8 full level
E02F 3/43 (2006.01); E02F 9/22 (2006.01); F15B 11/00 (2006.01); F15B 11/024 (2006.01); F15B 11/044 (2006.01)
CPC (source: EP)
E02F 3/435 (2013.01); E02F 9/2203 (2013.01); E02F 9/2221 (2013.01); E02F 9/2228 (2013.01); E02F 9/2285 (2013.01); F15B 11/003 (2013.01); F15B 11/024 (2013.01); F15B 11/044 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/30525 (2013.01); F15B 2211/3111 (2013.01); F15B 2211/3144 (2013.01); F15B 2211/31588 (2013.01); F15B 2211/329 (2013.01); F15B 2211/40515 (2013.01); F15B 2211/40576 (2013.01); F15B 2211/413 (2013.01); F15B 2211/41581 (2013.01); F15B 2211/428 (2013.01); F15B 2211/46 (2013.01); F15B 2211/6306 (2013.01); F15B 2211/6346 (2013.01); F15B 2211/6355 (2013.01)
Citation (search report)
- [A] DE 19932948 A1 20000210 - CATERPILLAR INC [US]
- [A] FR 2537184 A1 19840608 - ORENSTEIN & KOPPEL AG [DE]
- [A] EP 0436740 A1 19910717 - KOMATSU MFG CO LTD [JP]
- See references of WO 0171110A1
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1211359 A1 20020605; EP 1211359 A4 20061213; EP 1211359 B1 20081105; DE 60040746 D1 20081218; JP 2001262629 A 20010926; JP 3627972 B2 20050309; WO 0171110 A1 20010927
DOCDB simple family (application)
EP 00956920 A 20000904; DE 60040746 T 20000904; JP 0006005 W 20000904; JP 2000076002 A 20000317