Global Patent Index - EP 1045992 A1

EP 1045992 A1 20001025 - CONTROL ARRANGEMENT FOR A HYDRAULIC MOTOR

Title (en)

CONTROL ARRANGEMENT FOR A HYDRAULIC MOTOR

Title (de)

STEUERVORRICHTUNG FÜR EINEN HYDRAULIKMOTOR

Title (fr)

MECANISME DE COMMANDE DE MOTEUR HYDRAULIQUE

Publication

EP 1045992 A1 20001025 (EN)

Application

EP 99900439 A 19990108

Priority

  • DE 19800721 A 19980112
  • DK 9900009 W 19990108

Abstract (en)

[origin: DE19800721A1] A control arrangement for a hydraulic motor (1) is, at least in one working direction, loadable by an external load (2). It has a control valve (3) with an inflow control throttle (5) and a return control throttle (7). The control valve (3) is part of a pressure control, in which the motor inflow pressure (PA) is substantially determined by the control valve (3). Further, there is a load retaining valve (14) in the return path (8), which opens in dependence of the difference between the motor inflow pressure (PA) and a reference pressure (PR), which can be picked off between the load retaining valve (14) and the return control throttle (7). A compensation valve (13) maintains a constant pressure drop at an adjustable throttle arranged in the return path (8). This gives a control arrangement, which is to a high degree load independent during lowering and stable 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 11/00 (2006.01); F15B 11/04 (2006.01); F15B 11/042 (2006.01); F15B 11/044 (2006.01); F15B 11/05 (2006.01); F15B 13/01 (2006.01)

CPC (source: EP)

B66C 13/18 (2013.01); B66C 13/20 (2013.01); B66F 9/22 (2013.01); E02F 9/2207 (2013.01); F15B 11/003 (2013.01); F15B 11/042 (2013.01); F15B 11/0445 (2013.01); F15B 13/01 (2013.01); F15B 2211/30515 (2013.01); F15B 2211/30535 (2013.01); F15B 2211/3144 (2013.01); F15B 2211/31576 (2013.01); F15B 2211/324 (2013.01); F15B 2211/351 (2013.01); F15B 2211/40515 (2013.01); F15B 2211/40561 (2013.01); F15B 2211/413 (2013.01); F15B 2211/41527 (2013.01); F15B 2211/428 (2013.01); F15B 2211/50545 (2013.01); F15B 2211/50581 (2013.01)

Citation (search report)

See references of WO 9935407A1

Designated contracting state (EPC)

AT DE FR GB IT SE

DOCDB simple family (publication)

DE 19800721 A1 19990715; AT 283428 T 20041215; AU 1960299 A 19990726; DE 69922158 D1 20041230; DE 69922158 T2 20051124; EP 1045992 A1 20001025; EP 1045992 B1 20041124; WO 9935407 A1 19990715

DOCDB simple family (application)

DE 19800721 A 19980112; AT 99900439 T 19990108; AU 1960299 A 19990108; DE 69922158 T 19990108; DK 9900009 W 19990108; EP 99900439 A 19990108