EP 0439436 A3 19921028 - A VARIABLE SPEED CONTROL DEVICE FOR FORK LIFT EQUIPMENT
Title (en)
A VARIABLE SPEED CONTROL DEVICE FOR FORK LIFT EQUIPMENT
Publication
Application
Priority
IT 4001290 A 19900124
Abstract (en)
[origin: EP0439436A2] In an electronic speed control device for fork lift equipment, which can be operated by a single knob or handle and features hardware comprising a single microprocessor controlled chopper circuit (1), both the elevation and the descent movement of the lift are piloted digitally using software written and stored in EPROM (14) so as to enable its subsequent modification if need be; the circuit thus controls not only the usual d.c. motor (3) coupled to the pump (5) which extends the hydraulic lift cylinder, but also the proportional valve (4) conventionally used to regulate descent. <IMAGE>
IPC 1-7
IPC 8 full level
B66F 9/24 (2006.01)
CPC (source: EP)
B66F 9/24 (2013.01)
Citation (search report)
- [A] FR 2603271 A1 19880304 - JUNGHEINRICH KG [DE]
- [A] WO 8806566 A1 19880907 - CATERPILLAR IND INC [US]
- [A] US 4586331 A 19860506 - OHMAN DONALD M [US]
- [A] US 4097791 A 19780627 - BIVENS WARD L, et al
- [A] FR 2499961 A1 19820820 - KOMATSU FORKLIFT [JP]
- [A] GB 2095861 A 19821006 - TOYODA AUTOMATIC LOOM WORKS, et al
Designated contracting state (EPC)
DE FR GB NL SE
DOCDB simple family (publication)
EP 0439436 A2 19910731; EP 0439436 A3 19921028; IT 1239092 B 19930921; IT 9040012 A0 19900124; IT 9040012 A1 19910724
DOCDB simple family (application)
EP 91830009 A 19910118; IT 4001290 A 19900124