Global Patent Index - EP 1045993 A1

EP 1045993 A1 20001025 - CONTROL ARRANGEMENT FOR A HYDRAULIC MOTOR

Title (en)

CONTROL ARRANGEMENT FOR A HYDRAULIC MOTOR

Title (de)

STEUERVORRICHTUNG FÜR EINEN HYFRAULIKMOTOR

Title (fr)

MECANISME DE COMMANDE DE MOTEUR HYDRAULIQUE

Publication

EP 1045993 A1 20001025 (EN)

Application

EP 99900441 A 19990108

Priority

  • DE 19800722 A 19980112
  • DK 9900011 W 19990108

Abstract (en)

[origin: DE19800722A1] A control arrangement for a hydraulic motor, which is, at least in one working direction, loadable by an external force, with a control valve (3) having in this working direction an inflow control throttle (5) in an inflow path (6), and a return control throttle (7) in a return path (8). Further, a load retaining valve (10) is arranged in the return path (8), which is loaded in the closed position by its outlet pressure (PF) and a spring (11) and in the opening direction by the motor inflow pressure (PA). Besides, means are provided for increasing the pressure drop between load retaining valve (10) and tank connection (T) to a value higher than the pressure drop between pump connection (P) and inflow motor connection (A). This gives a better stabilisation towards oscillations.

IPC 1-7

F15B 11/04

IPC 8 full level

B66C 13/18 (2006.01); B66F 9/22 (2006.01); E02F 9/22 (2006.01); F15B 13/01 (2006.01)

CPC (source: EP)

B66C 13/066 (2013.01); B66C 13/18 (2013.01); B66F 9/22 (2013.01); E02F 9/226 (2013.01); F15B 11/003 (2013.01); F15B 13/01 (2013.01); F15B 2211/50545 (2013.01)

Citation (search report)

See references of WO 9935406A1

Designated contracting state (EPC)

AT DE IT

DOCDB simple family (publication)

DE 19800722 A1 19990715; DE 19800722 B4 20040819; AU 1960499 A 19990726; EP 1045993 A1 20001025; WO 9935406 A1 19990715

DOCDB simple family (application)

DE 19800722 A 19980112; AU 1960499 A 19990108; DK 9900011 W 19990108; EP 99900441 A 19990108