Global Patent Index - EP 0830221 A1

EP 0830221 A1 19980325 - HYDRAULIC PRESSURE BOOSTING UNIT, IN PARTICULAR FOR A PRESS OPERATING ACCORDING TO THE HIGH INNER PRESSURE EXTRUSION PROCESS

Title (en)

HYDRAULIC PRESSURE BOOSTING UNIT, IN PARTICULAR FOR A PRESS OPERATING ACCORDING TO THE HIGH INNER PRESSURE EXTRUSION PROCESS

Title (de)

HYDRAULISCHE DRUCKÜBERSETZEREINHEIT, INSBESONDERE FÜR EINE NACH DEM INNENHOCHDRUCKUMFORMVERFAHREN ARBEITENDE PRESSE

Title (fr)

UNITE HYDRAULIQUE MULTIPLICATRICE DE PRESSION, NOTAMMENT POUR UNE PRESSE FONCTIONNANT SELON LE PROCEDE D'EXTRUSION A HAUTE PRESSION INTERIEURE

Publication

EP 0830221 A1 19980325 (DE)

Application

EP 96921949 A 19960607

Priority

  • DE 19521101 A 19950609
  • EP 9602489 W 19960607

Abstract (en)

[origin: WO9641692A1] A hydraulic pressure boosting unit (11) is used in particular in a press operating according to the high inner pressure extrusion process. The hydraulic pressure boosting unit has a docking cylinder (10) with a docking piston that slides in a first cylinder chamber (15) and a docking piston rod (26) secured to the docking piston projects outwards through a housing head (20). The hydraulic pressure boosting unit has a pressure booster (11) with a primary piston (40) located in a second cylinder chamber (16) coaxial to the first cylinder chamber and separated from the first cylinder chamber by a housing bottom (17) and with a secondary piston (41) that plunges into a central axial bore (28) of the docking piston and docking piston rod. In order to generate high forces with the docking cylinder, only one side of the docking piston has a piston rod, namely the docking piston rod.

IPC 1-7

B21D 26/02; B30B 12/00; F15B 3/00

IPC 8 full level

F15B 11/028 (2006.01); B21D 26/02 (2011.01); B21D 26/033 (2011.01); B30B 12/00 (2006.01); F15B 3/00 (2006.01)

CPC (source: EP)

B21D 26/033 (2013.01); B30B 1/32 (2013.01); F15B 3/00 (2013.01)

Citation (search report)

See references of WO 9641692A1

Designated contracting state (EPC)

AT BE DE ES FR GB IT PT SE

DOCDB simple family (publication)

WO 9641692 A1 19961227; AT E176414 T1 19990215; CA 2224208 A1 19961227; CZ 396097 A3 19990512; DE 19521101 A1 19961212; DE 59601271 D1 19990318; EP 0830221 A1 19980325; EP 0830221 B1 19990203; JP H11509479 A 19990824

DOCDB simple family (application)

EP 9602489 W 19960607; AT 96921949 T 19960607; CA 2224208 A 19960607; CZ 396097 A 19960607; DE 19521101 A 19950609; DE 59601271 T 19960607; EP 96921949 A 19960607; JP 50260597 A 19960607