EP 4055278 A1 20220914 - ELECTRO-HYDRAULIC ACTUATOR
Title (en)
ELECTRO-HYDRAULIC ACTUATOR
Title (de)
ELEKTROHYDRAULISCHER STELLANTRIEB
Title (fr)
ACTIONNEUR ÉLECTRO-HYDRAULIQUE
Publication
Application
Priority
- FI 20195943 A 20191104
- FI 2020050726 W 20201104
Abstract (en)
[origin: WO2021089917A1] An electro-hydraulic actuator (1) comprises a cylinder (2) comprising at least three chambers, a piston (3) configured to move within the cylinder and a rod (4) attached to the piston. At least two of the chambers comprise working chambers (5a, 5b) to move the piston (3) and the rod (4). The electro-hydraulic actuator (1) further comprises a hydraulic pump/motor (9) for providing pressure medium to and from the working chambers, and an electric motor (8) rotating the pump/motor (9). At least two working chambers (5a, 5b) comprise equal volumes, and at least one of said chambers, which is not one of said working chambers (5a, 5b), is a reservoir chamber (11) configured to act as an integrated reservoir.
IPC 8 full level
F15B 13/02 (2006.01); F15B 13/042 (2006.01); F15B 13/044 (2006.01)
CPC (source: EP FI)
F15B 7/006 (2013.01 - EP); F15B 13/02 (2013.01 - FI); F15B 13/042 (2013.01 - FI); F15B 13/0444 (2013.01 - FI); F15B 15/1466 (2013.01 - EP); F15B 15/18 (2013.01 - EP); F15B 15/2838 (2013.01 - EP); F15B 21/04 (2013.01 - EP); F15B 21/047 (2013.01 - EP); F15B 1/26 (2013.01 - EP); F15B 21/0423 (2019.01 - EP); F15B 21/14 (2013.01 - EP); F15B 2211/20515 (2013.01 - EP); F15B 2211/20561 (2013.01 - EP); F15B 2211/20569 (2013.01 - EP); F15B 2211/20576 (2013.01 - EP); F15B 2211/27 (2013.01 - EP); F15B 2211/6336 (2013.01 - EP); F15B 2211/6651 (2013.01 - EP); F15B 2211/6658 (2013.01 - EP); F15B 2211/7053 (2013.01 - EP); F15B 2211/8609 (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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2021089917 A1 20210514; EP 4055278 A1 20220914; EP 4055278 A4 20231213; FI 130288 B 20230602; FI 20195943 A1 20210505
DOCDB simple family (application)
FI 2020050726 W 20201104; EP 20883833 A 20201104; FI 20195943 A 20191104