EP 1593645 A3 20070502 - Hydraulic lifting device for a telescopically extendable fork lift truck mast
Title (en)
Hydraulic lifting device for a telescopically extendable fork lift truck mast
Title (de)
Hydraulische Hebevorrichtung für einen teleskopisch ausziehbaren Gabelstaplermast
Title (fr)
Appareil de levage hydraulique pour le mât télescopique d'un chariot élévateur à fourches
Publication
Application
Priority
SE 0401169 A 20040503
Abstract (en)
[origin: EP1593645A2] Device at fork truck where in a telescopically extendable mast in the outermost or uppermost mast section is arranged a movement journaling of movement of the forks over the major part of the height of the uppermost mast section, and where lifting movements are achieved hydraulically by means of one or several hydraulic pistons (4) for the lifting of the mast sections and one or several other hydraulic pistons (3) for the lifting of the forks (8) in relation to the uppermost mast section (5). In the feed conduits to the hydraulic cylinders proportional valves 1, 2 are arranged in order to, at the transition shift between low lift movement and high lift movement and vice versa successively control the oil flow to and from the cylinders of the different systems respectively so that an unnoticeable transition and constant speed is obtained.
IPC 8 full level
B66F 9/22 (2006.01); F15B 11/048 (2006.01)
CPC (source: EP SE)
B66F 9/08 (2013.01 - SE); B66F 9/22 (2013.01 - EP SE); F15B 11/205 (2013.01 - SE)
Citation (search report)
- [XY] DE 19710556 A1 19980917 - JUNGHEINRICH AG [DE]
- [XA] JP H08188398 A 19960723 - NISSAN MOTOR
- [Y] DE 4423644 A1 19960111 - BUCHHOLZ HYDRAULIK [DE]
- [Y] EP 1136433 A2 20010926 - TOYODA AUTOMATIC LOOM WORKS [JP]
- [Y] DE 10047631 A1 20020411 - LINDE AG [DE]
- [A] DE 4425455 A1 19960125 - BOSCH GMBH ROBERT [DE]
- [A] DE 19831828 A1 20000120 - LINDE AG [DE]
- [A] DE 10033094 A1 20020117 - BUCHHOLZ HYDRAULIK [DE]
- [A] DE 1016194 B 19570919 - HANS STILL AG
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR LV MK YU
DOCDB simple family (publication)
EP 1593645 A2 20051109; EP 1593645 A3 20070502; EP 1593645 B1 20120808; SE 0401169 D0 20040503; SE 0401169 L 20051104; SE 529748 C2 20071113
DOCDB simple family (application)
EP 05445026 A 20050501; SE 0401169 A 20040503