EP 0872446 A3 20000503 - 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
Application
Priority
DE 19716442 A 19970420
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
IPC 8 full level
B66F 9/22 (2006.01); F15B 11/05 (2006.01); F15B 13/01 (2006.01); F15B 13/044 (2006.01)
CPC (source: EP)
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)
- [A] EP 0498610 A2 19920812 - MITSUBISHI HEAVY IND LTD [JP], et al
- [A] EP 0546300 A1 19930616 - BOSCH GMBH ROBERT [DE]
- [A] DE 3441946 A1 19860528 - BOSCH GMBH ROBERT [DE]
- [A] US 5036886 A 19910806 - OLSEN ZENNY [US], et al
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 (publication)
EP 0872446 A2 19981021; EP 0872446 A3 20000503; EP 0872446 B1 20031022; DE 19716442 A1 19981022; DE 59809944 D1 20031127
DOCDB simple family (application)
EP 98107020 A 19980417; DE 19716442 A 19970420; DE 59809944 T 19980417