EP 0487725 B1 19960221 - HOOK LIFT DISPLAY APPARATUS OF CRANE AND METHOD OF DETERMINATION
Title (en)
HOOK LIFT DISPLAY APPARATUS OF CRANE AND METHOD OF DETERMINATION
Title (de)
SICHTANZEIGEGERÄT UND BESTIMMVERFAHREN FÜR DIE HÖHENLAGE EINES KRANHAKENS
Title (fr)
APPAREIL D'AFFICHAGE DE L'ELEVATION DU CROCHET D'UNE GRUE ET METHODE DE DETERMINATION
Publication
Application
Priority
JP 9000784 W 19900615
Abstract (en)
[origin: EP0487725A1] Rope movement is detected through a rope movement change quantity at predetermined time intervals and the rope movement quantity is obtained by the accumulated value of the change quantities. When a hook structure reaches a spiral length position, the accumulated rope movement value is reset automatically to zero to update the reference position of rope movement, and measurement error of rope movement is corrected. The hook structure suspension length from the tip of a boom or jib is determined from the rope movement quantity thus obtained, and the hook lift is calculated. The hook lift or hook structure position thus calculated is displayed on a display with reference to a fixed index or pattern and the operator can monitor the behavior of the hook structure on the display. <IMAGE>
IPC 1-7
IPC 8 full level
B66C 13/46 (2006.01); B66C 23/90 (2006.01)
CPC (source: EP)
B66C 13/46 (2013.01); B66C 23/90 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0487725 A1 19920603; EP 0487725 A4 19921202; EP 0487725 B1 19960221; DE 487725 T1 19920924; DE 69025477 D1 19960328; DE 69025477 T2 19960718; KR 0153459 B1 19990218; RU 2096307 C1 19971120; WO 9119665 A1 19911226
DOCDB simple family (application)
EP 90909368 A 19900615; DE 69025477 T 19900615; DE 90909368 T 19900615; JP 9000784 W 19900615; KR 920700326 A 19920214; SU 5011358 A 19900615