EP 2498982 A2 20120919 - MACHINE PRESS
Title (en)
MACHINE PRESS
Title (de)
MASCHINENPRESSE
Title (fr)
PRESSE
Publication
Application
Priority
- DE 102009052531 A 20091111
- EP 2010006842 W 20101110
Abstract (en)
[origin: WO2011057773A2] In a machine press (1) having a lower and an upper tool carrier, a hydraulic drive acting on the upper tool carrier comprises at least one closed hydraulic drive system that can be switched between rapid motion and press motion, the drive system having at least one hydraulic cylinder piston unit (12). The hydraulic liquid of the at least one hydraulic drive system is stored in a pressure accumulator (19) forming the storage container, supplying the entire associated hydraulic drive system permanently with at least a base pressure above the ambient pressure. There is no hydraulic connection whatsoever between the working chamber (22) on the piston rod side and the working chamber (24) on the piston side of at least one hydraulic cylinder piston unit (12). The upper tool carrier is prestressed into the upper final position thereof by means of a spring unit (21).
IPC 8 full level
B30B 1/32 (2006.01); B30B 15/16 (2006.01); F15B 7/00 (2006.01); F15B 11/02 (2006.01)
CPC (source: EP US)
B30B 15/161 (2013.01 - EP US); B30B 15/163 (2013.01 - EP US)
Citation (search report)
See references of WO 2011057773A2
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)
DE 102009052531 A1 20110512; CN 102725135 A 20121010; CN 102725135 B 20150513; DK 2498982 T3 20150511; EP 2498982 A2 20120919; EP 2498982 B1 20150225; ES 2537627 T3 20150610; JP 2013510719 A 20130328; JP 5576939 B2 20140820; PT 2498982 E 20150601; US 2012272840 A1 20121101; US 9044913 B2 20150602; WO 2011057773 A2 20110519; WO 2011057773 A3 20110714
DOCDB simple family (application)
DE 102009052531 A 20091111; CN 201080061188 A 20101110; DK 10810753 T 20101110; EP 10810753 A 20101110; EP 2010006842 W 20101110; ES 10810753 T 20101110; JP 2012538235 A 20101110; PT 10810753 T 20101110; US 201213467474 A 20120509