EP 0003939 A3 19800416 - IMPROVEMENTS IN HYDRAULICALLY OPERATED LIFTING DEVICES
Title (en)
IMPROVEMENTS IN HYDRAULICALLY OPERATED LIFTING DEVICES
Publication
Application
Priority
FR 7805906 A 19780301
Abstract (en)
[origin: EP0003939A2] Hydraulic lifting device comprising two articulated arms actuated by jacks, and means for detecting the pressure of the circuit supplying the hydraulic jacks. The pressure-detector means 21, 23 are arranged so as to lock the arms at 27a, 35a as soon as the moment of the load generates a pressure greater than a predetermined value; furthermore, safety means 31 to 34, 37 to 40, 45 to 48 are provided for checking the movements of the arms, which means are arranged in order to permit, by virtue of means 30, 36 for detecting the angular positions of the arms, the controlling of the arms at 27b, 35b uniquely in a sequence which reduces the moment of the load. Application to auxiliary handling devices. <IMAGE>
IPC 1-7
IPC 8 full level
B66C 23/90 (2006.01)
CPC (source: EP)
B66C 23/90 (2013.01); B66C 23/905 (2013.01)
Citation (search report)
- [A] GB 1403046 A 19750813 - WEIMAR KOMBINAT VEB
- [A] DE 1244358 B 19670713 - KLOECKNER HUMBOLDT DETUZ AG
- [A] US 3371800 A 19680305 - GROVE JOHN L
- [A] GB 1358871 A 19740703 - PYE LTD
- [A] FR 2164572 A1 19730803 - GROSS SIEGFRIED
- [A] US 3035712 A 19620522 - RUDOLF NOWACK
- [A] FR 2261216 A1 19750912 - TICO AB [SE]
Designated contracting state (EPC)
BE CH DE GB IT LU NL SE
DOCDB simple family (publication)
EP 0003939 A2 19790905; EP 0003939 A3 19800416; FR 2418766 A1 19790928
DOCDB simple family (application)
EP 79400129 A 19790301; FR 7805906 A 19780301