EP 3837446 B1 20220928 - ELECTROHYDROSTATIC ACTUATOR SYSTEM WITH AN EXPANSION RESERVOIR
Title (en)
ELECTROHYDROSTATIC ACTUATOR SYSTEM WITH AN EXPANSION RESERVOIR
Title (de)
ELEKTROHYDROSTATISCHES AKTUATORSYSTEM MIT NACHSAUGBEHÄLTER
Title (fr)
SYSTÈME ACTIONNEUR ÉLECTROHYDROSTATIQUE À RÉSERVOIR D'ASPIRATION
Publication
Application
Priority
- DE 102018120000 A 20180816
- EP 2019071360 W 20190808
Abstract (en)
[origin: WO2020035398A1] An electrohydrostatic actuator system comprising: a volume- and/or speed-variable hydraulic machine which is driven by an electric motor, for providing a volumetric flow of a hydraulic fluid; a differential cylinder with a piston side and a ring side, and at least one pretensioning source. The actuator system has a closed hydraulic circuit, wherein, during operation, the hydraulic fluid in the hydraulic circuit is pressurized by means of the hydraulic machine and/or the pretensioning source. Furthermore, according to the invention, the differential cylinder provides a power motion operating mode and a rapid motion operating mode. In order to balance a volume of the hydraulic fluid in the closed hydraulic circuit, according to the invention an expansion reservoir is connected to the piston side of the differential cylinder via a valve.
IPC 8 full level
F15B 1/26 (2006.01); F15B 7/00 (2006.01); F15B 11/17 (2006.01)
CPC (source: EP US)
F15B 1/26 (2013.01 - US); F15B 7/006 (2013.01 - EP US); F15B 11/17 (2013.01 - US); F15B 1/26 (2013.01 - EP); F15B 11/17 (2013.01 - EP); F15B 2211/20561 (2013.01 - EP US); F15B 2211/20576 (2013.01 - EP); F15B 2211/20584 (2013.01 - EP); F15B 2211/20592 (2013.01 - EP US); F15B 2211/212 (2013.01 - EP US); F15B 2211/27 (2013.01 - EP US); F15B 2211/615 (2013.01 - EP US); F15B 2211/62 (2013.01 - EP US); F15B 2211/7053 (2013.01 - EP); F15B 2211/785 (2013.01 - EP)
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 2020035398 A1 20200220; CN 112567139 A 20210326; CN 112567139 B 20230613; DE 102018120000 A1 20200220; EP 3837446 A1 20210623; EP 3837446 B1 20220928; US 11603867 B2 20230314; US 2021332831 A1 20211028
DOCDB simple family (application)
EP 2019071360 W 20190808; CN 201980053102 A 20190808; DE 102018120000 A 20180816; EP 19753311 A 20190808; US 201917268318 A 20190808