Global Patent Index - EP 1181232 B1

EP 1181232 B1 2003-06-25 - METHOD FOR SYNCHRONOUSLY RETRACTING AND EXTENDING TELESCOPIC LENGTHS OF A CRANE JIB

Title (en)

METHOD FOR SYNCHRONOUSLY RETRACTING AND EXTENDING TELESCOPIC LENGTHS OF A CRANE JIB

Title (de)

VERFAHREN ZUM SYNCHRONEN EIN- UND AUSTELESKOPIEREN VON TELESKOPSCHÜSSEN EINES KRANAUSLEGERS

Title (fr)

PROCEDE D'ENTREE ET DE SORTIE TELESCOPIQUES SYNCHRONISEES DE RALLONGES TELESCOPIQUES D'UN BRAS DE GRUE

Publication

EP 1181232 B1 (DE)

Application

EP 00949066 A

Priority

  • DE 0001741 W
  • DE 19925188 A

Abstract (en)

[origin: DE19925188A1] The invention relates to a method for synchronously retracting and extending a crane jib, preferably a vehicle crane, comprising a plurality of telescopic lengths by means of a hydraulically driven multistage telescopic cylinder or by means of a plurality of single-stage telescopic cylinders that can be parallelly operated. An electric signal is output to an input of a control electronic unit (a1) via a pre-control transmitter (a2). Said signal serves as a specified value for the telescoping speed of a telescopic cylinder or stage which takes over the guide roller, and the control electronic unit is informed of the actual value designating the current position (b1) of the telescopic cylinders or stages. Said control electronic unit conducts a comparison between the actual value of the telescopic cylinder or stage which takes over the guide roller and the actual value of the telescopic cylinders or stages (b2) to be controlled, and, in the instance that an unacceptable variation is ascertained, the telescoping speed of the remaining telescopic cylinders is increased or decreased until a synchronous telescoping of all telescopic cylinders or stages occurs.

IPC 1-7 (main, further and additional classification)

B66C 23/693

IPC 8 full level (invention and additional information)

B66C 23/687 (2006.01); B66C 23/693 (2006.01); B66C 23/70 (2006.01)

CPC (invention and additional information)

B66C 23/705 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

DE 19925188 A1 20001207; DE 19925188 C2 20030313; AT 243652 T 20030715; AU 6258700 A 20001218; EP 1181232 A1 20020227; EP 1181232 B1 20030625; JP 2003500316 A 20030107; US 6516960 B1 20030211; WO 0073197 A1 20001207