EP 2512791 A2 20121024 - DRIVE DEVICE FOR A BENDING PRESS
Title (en)
DRIVE DEVICE FOR A BENDING PRESS
Title (de)
ANTRIEBSVORRICHTUNG FÜR EINE BIEGEPRESSE
Title (fr)
DISPOSITIF D'ENTRAÎNEMENT POUR UNE PRESSE DE PLIAGE
Publication
Application
Priority
- AT 20042009 A 20091217
- AT 2010000482 W 20101215
Abstract (en)
[origin: WO2011079333A2] The invention relates to a drive device (1) for a bending press (3), in particular a press brake (2), comprising a press frame (10) having a stationary press beam (2) and having a press beam (4) that can be moved relative to the press beam (2) by means of a beam adjusting device (6) formed by a closed hydraulic system (5), comprising a hydraulic pump (46) having a controllable drive motor (47), at least one control valve (48), and at least one hydraulic linear actuator (7). The linear actuator (7) comprises a first piston arrangement (25) having a first piston (27) that divides a cylinder chamber (34) into a first pressure chamber (35) and a second pressure chamber (37) and, in a further cylinder chamber (39), a second piston arrangement (26) having a further piston (28) and at least one further pressure chamber (40). The first piston arrangement (25) and the second piston arrangement (26) are coupled to each other.
IPC 8 full level
B30B 15/16 (2006.01)
CPC (source: EP US)
B30B 15/16 (2013.01 - US); B30B 15/161 (2013.01 - EP US)
Citation (search report)
See references of WO 2011079333A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2011079333 A2 20110707; WO 2011079333 A3 20111013; AT 509239 A1 20110715; AT 509239 B1 20130315; EP 2512791 A2 20121024; US 2012272708 A1 20121101; US 9688041 B2 20170627
DOCDB simple family (application)
AT 2010000482 W 20101215; AT 20042009 A 20091217; EP 10807581 A 20101215; US 201013516345 A 20101215