EP 0972631 B1 20030326 - Hydraulic drive for a press
Title (en)
Hydraulic drive for a press
Title (de)
Hydraulischer Antrieb für eine Presse
Title (fr)
Entraînement hydraulique pour une presse
Publication
Application
Priority
DE 19831624 A 19980715
Abstract (en)
[origin: EP0972631A1] Press operation can be switched from 'simulation' with high plunger speed and low number of strokes, to 'production' with low speed and higher number of strokes. For this purpose, the pressure accumulator drive for a cylinder-piston unit (2) has an associated hydraulic transformer unit (27). This consists of a first hydraulic unit (28), formed as angle-adjustable hydraulic motor (29), and a second hydraulic unit (36), formed as an adjustable hydraulic pump, which is mechanically connected to the first. During simulation operation, the hydraulic accumulator (8) of the pump unit serves as drive for the first hydraulic unit.
IPC 1-7
IPC 8 full level
B30B 1/32 (2006.01); B30B 15/16 (2006.01); B30B 15/24 (2006.01)
CPC (source: EP US)
B30B 15/161 (2013.01 - EP US); B30B 15/163 (2013.01 - EP US); B30B 15/24 (2013.01 - EP US)
Citation (examination)
JP H09123000 A 19970513 - KAWASAKI YUKO KK
Designated contracting state (EPC)
DE ES FR IT SE
DOCDB simple family (publication)
EP 0972631 A1 20000119; EP 0972631 B1 20030326; DE 19831624 A1 20000120; DE 59904695 D1 20030430; US 6370873 B1 20020416
DOCDB simple family (application)
EP 99111751 A 19990618; DE 19831624 A 19980715; DE 59904695 T 19990618; US 35191899 A 19990714