EP 1072554 B1 20040317 - Crane with telescopic boom
Title (en)
Crane with telescopic boom
Title (de)
Kran mit einem Teleskopausleger
Title (fr)
Grue à flèche téléscopique
Publication
Application
Priority
- DE 29913333 U 19990730
- DE 20003355 U 20000224
Abstract (en)
[origin: US6527131B1] Segments can be telescoped out of the base boom with boom guides of a telescopic boom of a crane, which in either their extended or retracted positions are locked by locking pins. After releasing the locking pin connections, the segments can be moved in and out with a single-stage hydraulic piston-cylinder unit, one end of which is attached to the boom guide through two strokes so that each segment to be moved in or out is coupled either to the inside or the outside end area of the movable part of the piston-cylinder unit. In order to obtain a simpler structure, a movable ring or a movable pipe with a coupling device to couple the segments is placed on the cylinder by the piston rod fastened to the boom guide piece, which can be locked to either the internal or the external end area of the cylinder.
IPC 1-7
IPC 8 full level
B66C 23/687 (2006.01); B66C 23/693 (2006.01); B66C 23/70 (2006.01); F15B 15/14 (2006.01); F15B 15/16 (2006.01)
CPC (source: EP US)
B66C 23/705 (2013.01 - EP US); F15B 15/1466 (2013.01 - EP US); F15B 15/149 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 6527131 B1 20030304; EP 1072554 A1 20010131; EP 1072554 B1 20040317; JP 2001080883 A 20010327; JP 5044828 B2 20121010
DOCDB simple family (application)
US 62837900 A 20000731; EP 00115005 A 20000721; JP 2000228199 A 20000728