EP 1631746 A1 20060308 - HYDRAULIC DRIVE FOR DISPLACING AN ACTUATOR
Title (en)
HYDRAULIC DRIVE FOR DISPLACING AN ACTUATOR
Title (de)
HYDRAULISCHER ANTRIEB ZUM VERLAGERN EINES STELLGLIEDES
Title (fr)
ENTRAINEMENT HYDRAULIQUE SERVANT A DEPLACER UN ACTIONNEUR
Publication
Application
Priority
- AT 2004000202 W 20040614
- AT 9132003 A 20030612
Abstract (en)
[origin: WO2004111468A1] The invention relates to a hydraulic drive for displacing an actuator (7) between two predefined end positions, said drive comprising a piston unit (4), which is housed in a cylinder unit (3) and can be impinged in opposing directions by means of hydraulic springs, and a control device for the alternate impingement of the piston unit (4) in opposing directions. The aim of the invention is to create advantageous construction conditions. To achieve this: the cylinder unit (3) comprises an end section (10) with a smaller cross-section than the rest of the cylinder chamber (9), said end section housing and sealing the respective end face (12) of the piston unit (4) in its corresponding end position; the end sections (10), which are connected to a return line (14) for the hydraulic fluid via a restrictor (13), are delimited in relation to the rest of the cylinder chamber (9) by a respective control edge (11); and the control device consists of a positioning drive (28), which allows the axial displacement of the control edge (11) in relation to the end face (12) of the piston.
IPC 1-7
IPC 8 full level
F15B 15/20 (2006.01); F15B 15/26 (2006.01)
CPC (source: EP KR US)
F15B 15/20 (2013.01 - KR); F15B 15/204 (2013.01 - EP US); F15B 15/26 (2013.01 - EP KR US)
Citation (search report)
See references of WO 2004111468A1
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 PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004111468 A1 20041223; AT 500672 A1 20060215; AT 500672 B1 20060815; AT 500672 B8 20070215; AT E370337 T1 20070915; CN 100398845 C 20080702; CN 1802513 A 20060712; DE 502004004658 D1 20070927; EP 1631746 A1 20060308; EP 1631746 B1 20070815; KR 101056532 B1 20110812; KR 20060026043 A 20060322; US 2006137336 A1 20060629; US 7395748 B2 20080708
DOCDB simple family (application)
AT 2004000202 W 20040614; AT 04736733 T 20040614; AT 9132003 A 20030612; CN 200480016072 A 20040614; DE 502004004658 T 20040614; EP 04736733 A 20040614; KR 20057023810 A 20040614; US 56022705 A 20051212