EP 0158738 A3 19881019 - HYDRAULIC OVERLOAD PROTECTION DEVICE FOR A LOADING CRANE
Title (en)
HYDRAULIC OVERLOAD PROTECTION DEVICE FOR A LOADING CRANE
Publication
Application
Priority
DE 3414183 A 19840414
Abstract (en)
[origin: EP0158738A2] A hydraulic overload protection device (10) for a loading-crane jib (11) actuated by a double-acting hydraulic cylinder (18) is proposed in which, in order to limit the load moment, a control slide (22) can be reset in a directional control valve (19) controlling the hydraulic cylinder (18), in the course of which the change in the working position increasing the load moment as a function of the position of the controlled jib part (15) relative to the horizontal (21) is automatically taken into account. Arranged on the jib part (15) is a hydromechanical position sensor (63) which, in combination with associated restoring means (44, 45, 47, 49, 54, 55, 58), controls the pressurizing or relief of two control chambers (44, 45) allocated to the control slide (22) as a function of the position of the jib part (15) relative to the horizontal (21) in such a way that the control slide (22) is always reset from a working position increasing the load moment but can be deflected into a working position decreasing the load moment. <IMAGE>
IPC 1-7
IPC 8 full level
B66C 23/90 (2006.01)
CPC (source: EP)
B66C 23/90 (2013.01)
Citation (search report)
- [A] GB 2078197 A 19820106 - HIAB FOCO AB
- [A] DK 131618 B 19750811 - HOJBJERG MASKINFABRIK AS [DK]
- [A] EP 0055247 A2 19820630 - PALFINGER FA [AT]
- [A] EP 0003939 A2 19790905 - GUTIERREZ MICHEL [FR], et al
- [A] DE 2338862 A1 19740228 - TICO AB
- [A] DD 87382 A
- [AD] DE 2154631 B2 19770721
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0158738 A2 19851023; EP 0158738 A3 19881019; DE 3414183 A1 19851024
DOCDB simple family (application)
EP 84116255 A 19841222; DE 3414183 A 19840414