EP 2328747 A1 20110608 - ACCUMULATOR-FREE HYDRAULIC DRIVE SYSTEM FOR A CONSUMER AND COMPRISING THE SAME, ESPECIALLY FOR HYDRAULIC PRESSES, AND METHOD FOR HYDRAULICALLY DRIVING A CONSUMER WITHOUT AN ACCUMULATOR
Title (en)
ACCUMULATOR-FREE HYDRAULIC DRIVE SYSTEM FOR A CONSUMER AND COMPRISING THE SAME, ESPECIALLY FOR HYDRAULIC PRESSES, AND METHOD FOR HYDRAULICALLY DRIVING A CONSUMER WITHOUT AN ACCUMULATOR
Title (de)
DRUCKSPEICHERLOSE HYDRAULISCHE ANTRIEBSANORDNUNG FÜR UND MIT EINEM VERBRAUCHER, INSBESONDERE FÜR HYDRAULISCHE PRESSEN, SOWIE VERFAHREN ZUM DRUCKSPEICHERLOSEN HYDRAULISCHEN ANTREIBEN EINES VERBRAUCHERS
Title (fr)
SYSTÈME DE COMMANDE HYDRAULIQUE SANS ACCUMULATEUR DE PRESSION POUR UN CONSOMMATEUR ET COMPRENANT UN CONSOMMATEUR, EN PARTICULIER POUR DES PRESSES HYDRAULIQUES, ET PROCÉDÉ DE COMMANDE HYDRAULIQUE D'UN CONSOMMATEUR SANS UTILISATION D'UN ACCUMULATEUR DE PRESSION
Publication
Application
Priority
- EP 2009006088 W 20090821
- DE 102008039011 A 20080821
Abstract (en)
[origin: WO2010020427A1] The invention relates to an accumulator-free hydraulic drive system and to a method for hydraulically driving a consumer (1) without an accumulator. The drive system comprises a consumer (1) having two pressure compartments (K, R) which act in opposite directions, one of which can be supplied with a pressure medium via a first pressure conduit (D1) and a pump arrangement (20) and the other via a second pressure conduit (D2) and the pump arrangement (20). Said pump arrangement (20) consists of a main feed pump (P1) driven with variable torques for working strokes and of an auxiliary pump (P2) driven with variable torques for return strokes. The delivery direction of the auxiliary pump (P2) can be reversed and the auxiliary pump (P2) can be or is hydraulically connected via a directional valve (13) optionally to the first (K) and/or to the second (R) pressure compartment of the consumer (1).
IPC 8 full level
B30B 15/16 (2006.01); F15B 11/17 (2006.01)
CPC (source: EP)
F15B 11/17 (2013.01); F15B 2211/20515 (2013.01); F15B 2211/20561 (2013.01); F15B 2211/20576 (2013.01); F15B 2211/6336 (2013.01); F15B 2211/7053 (2013.01)
Citation (search report)
See references of WO 2010020427A1
Designated contracting state (EPC)
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 SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
DE 102008039011 A1 20100225; DE 102008039011 B4 20200116; EP 2328747 A1 20110608; EP 2328747 B1 20150408; EP 2732959 A2 20140521; EP 2732959 A3 20140611; EP 2732959 B1 20180502; ES 2541670 T3 20150723; ES 2693422 T3 20181211; WO 2010020427 A1 20100225
DOCDB simple family (application)
DE 102008039011 A 20080821; EP 09778039 A 20090821; EP 13005011 A 20090821; EP 2009006088 W 20090821; ES 09778039 T 20090821; ES 13005011 T 20090821