Global Patent Index - EP 3228580 A1

EP 3228580 A1 2017-10-11 - A CONTROL DEVICE OF AN ACTUATOR

Title (en)

A CONTROL DEVICE OF AN ACTUATOR

Title (de)

STEUERUNGSVORRICHTUNG FÜR EINEN AKTUATOR

Title (fr)

DISPOSITIF DE COMMANDE D'UN ACTIONNEUR

Publication

EP 3228580 A1 (EN)

Application

EP 17164639 A

Priority

IT UA20162376 A

Abstract (en)

Control device (1) of a hydraulic cylinder (2) of a load lifting apparatus, in which a hydraulic circuit comprises a recirculating conduit (14) in order for the fluid, in a load descent step, to exit from the chamber on the bottom side of the cylinder to re-enter the chamber on the stem side, a drain conduit (17) for draining from the recirculating conduit the fraction of fluid that does not recirculate, a circuit element that generates a localized pressure drop in the drain conduit, and a flow control valve (18) in the recirculating conduit with two piloted pressures taken from the two opposite sides of the aforesaid circuit element (11). The device permits regular operation with low pressure and low fluid flowrate in a load descent step.

IPC 8 full level (invention and additional information)

B66F 9/22 (2006.01)

CPC (invention and additional information)

B66F 9/22 (2013.01)

Citation (applicant)

Citation (search report)

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

EPO simple patent family

EP 3228580 A1 20171011

INPADOC legal status


2017-10-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): 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

2017-10-11 [AV] REQUEST FOR VALIDATION OF THE EUROPEAN PATENT IN

- Countries: MA MD

2017-10-11 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Countries: BA ME