EP 1413773 A3 20040512 - Computerized electro-hydraulic proportional control device
Title (en)
Computerized electro-hydraulic proportional control device
Title (de)
Computerisierte elektrohydraulische Proportional-Steuervorrichtung
Title (fr)
Dispositif de contrôle proportionel électro-hydraulique à commande informatisée
Publication
Application
Priority
DE 20215838 U 20021015
Abstract (en)
[origin: EP1413773A2] The control of the actuator (H) used with such as a crane is based around four electro hydraulic proportional control valves (13-16) connected in a daisy chain. The pressure of the output and return lines (7,8) are monitored (9,10) and signals fed to a control unit (CU). This provides control inputs to the proportional valves to regulate the speed.
IPC 1-7
IPC 8 full level
F15B 11/00 (2006.01); F15B 11/042 (2006.01); F15B 11/044 (2006.01)
CPC (source: EP)
F15B 11/003 (2013.01); F15B 11/006 (2013.01); F15B 11/042 (2013.01); F15B 11/044 (2013.01)
Citation (search report)
- [Y] US 6199378 B1 20010313 - AARDEMA JAMES A [US], et al
- [Y] DE 20114538 U1 20011031 - KUEPPER WEISSER GMBH [DE]
- [AY] US 5875701 A 19990302 - COBO MICHAEL A [US], et al
- [A] EP 0900888 A1 19990310 - CATERPILLAR MITSUBISHI LTD [JP]
- [PX] US 6467264 B1 20021022 - STEPHENSON DWIGHT B [US], et al
- [ADY] MORLOK JOACHIM: "Klassiker kontra Neuentwicklung?", FLUID, January 2002 (2002-01-01), pages 26 - 29, XP001148165
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)
DE 20215838 U1 20040226; DE 50302571 D1 20060504; EP 1413773 A2 20040428; EP 1413773 A3 20040512; EP 1413773 B1 20060308
DOCDB simple family (application)
DE 20215838 U 20021015; DE 50302571 T 20030730; EP 03017275 A 20030730