Global Patent Index - EP 0872446 A3

EP 0872446 A3 2000-05-03 - Hydraulic installation for a forklift truck

Title (en)

Hydraulic installation for a forklift truck

Title (de)

Hydraulik-Installation an einem Gabelstapler-Fahrzeug

Title (fr)

Installation hydraulique pour chariot élévateur à fourche

Publication

EP 0872446 A3 (DE)

Application

EP 98107020 A

Priority

DE 19716442 A

Abstract (en)

[origin: EP0872446A2] The system includes a hydraulic lift drive formed as simple hydraulic cylinder (11), for a hydraulic ramp movable along a mast, and a hydraulic tilt drive for the mast. A lift control valve (14) has a first position corresponding to a lifting function, a second intermediate position maintained by a spring, corresponding to the standstill of the drive cylinder butt (13), and a third position corresponding to a lowering function. The released cross-section of a flow path is controllable in the first and third position. The control valve is formed as a 5/3-way valve (14), whose main butt is moved by a digital controllable electric servo-motor (96). A pressure sensor (107) produces electric output signals corresponding to the pressure in the drive chamber (12) of the lift drive cylinder.

IPC 1-7 (main, further and additional classification)

B66F 9/22

IPC 8 full level (invention and additional information)

B66F 9/22 (2006.01); F15B 11/05 (2006.01); F15B 13/01 (2006.01); F15B 13/044 (2006.01)

CPC (invention and additional information)

B66F 9/22 (2013.01); F15B 11/05 (2013.01); F15B 13/015 (2013.01); F15B 13/044 (2013.01); F15B 2211/30525 (2013.01); F15B 2211/327 (2013.01); F15B 2211/351 (2013.01); F15B 2211/353 (2013.01); F15B 2211/6313 (2013.01); F15B 2211/665 (2013.01); F15B 2211/6654 (2013.01); F15B 2211/761 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0872446 A2 19981021; EP 0872446 A3 20000503; EP 0872446 B1 20031022; DE 19716442 A1 19981022