EP 2529821 B1 20170426 - Hydraulic drive system for a stage with adjustable speed hydraulic pump as control element
Title (en)
Hydraulic drive system for a stage with adjustable speed hydraulic pump as control element
Title (de)
Hydraulisches Antriebssystem für eine Schauspielbühne mit drehzahlverstellbarer Hydraulikpumpe als Steuerelement
Title (fr)
Système d'entraînement hydraulique pour une scène de théâtre avec une pompe hydraulique à réglage de vitesse comme élément de commande
Publication
Application
Priority
DE 102011103515 A 20110603
Abstract (en)
[origin: EP2529821A1] The system has a check valve unit (90) arranged between an actuator and a controlling element, so that the check valve unit selectively blocks fluid flow i.e. oil flow, from the actuator to a storing unit. The controlling element includes a hydraulic pump (75) that is operated as a hydraulic motor, where the hydraulic pump stands in rotational drive-connection with an electric motor (76). The electric motor is connected with a rotational speed controlling unit (80) that adjusts a rotational speed of the electric motor to a predetermined target value.
IPC 8 full level
CPC (source: EP)
A63J 1/028 (2013.01)
Citation (examination)
DE 3723845 A1 19890126 - KRUPP GMBH [DE]
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)
EP 2529821 A1 20121205; EP 2529821 B1 20170426; DE 102011103515 A1 20121206; PL 2529821 T3 20170929
DOCDB simple family (application)
EP 12169701 A 20120529; DE 102011103515 A 20110603; PL 12169701 T 20120529