Global Patent Index - EP 0850364 B1

EP 0850364 B1 2000-01-26 - HYDROSTATIC DRIVE CONTROL DEVICE

Title (en)

HYDROSTATIC DRIVE CONTROL DEVICE

Title (de)

VORRICHTUNG ZUM ANSTEUERN EINES HYDROSTATISCHEN ANTRIEBES

Title (fr)

DISPOSITIF DE COMMANDE D'UN MECANISME D'ENTRAINEMENT HYDROSTATIQUE

Publication

EP 0850364 B1 (DE)

Application

EP 96931065 A

Priority

  • AT 150995 A
  • EP 9603964 W

Abstract (en)

[origin: WO9710444A1] The invention concerns a device for controlling a hydrostatic drive (1), said device comprising a resonator (2) which is connected on one side to the hydrostatic drive (1) and on the other side to a pressure medium supply line (4) and a return line (5). The device also comprises a pilot valve (3) which can be actuated periodically and connects the resonator (2) alternately to the pressure medium supply line (4) and the return line (5). In order to ensure that control conditions are advantageous, the resonator (2) comprises at least one pressure chamber (6) with a movable chamber-delimiting system (7) which can oscillate in order to vary the volume of the chamber. The movable chamber-delimiting system (7) forms part of a single-mass oscillator consisting of a mass and a spring (10) or itself forms such a single-mass oscillator. The pressure chamber (6), which can be connected alternately to the pressure medium supply line (4), the return line (5) and the hydrostatic drive (1), can be acted upon via the pilot valve (3) at a switching frequency lying in the super-resonance range of the single-mass oscillator.

IPC 1-7

F15B 21/12

IPC 8 full level

F15B 21/12 (2006.01)

CPC

F15B 21/125 (2013.01)

DCS

AT DE FR GB IT

DOCDB simple family

WO 9710444 A1 19970320; AT 189295 T 20000215; AT A150995 A 19971215; CZ 286073 B6 20000112; CZ 74398 A3 19991013; DE 59604316 D1 20000302; EP 0850364 A1 19980701; EP 0850364 B1 20000126; US 6082108 A 20000704