EP 0379448 B1 19920909 - CRANE WITH A LIFTING JIB AND WITH A JIB PUSH-BACK DEVICE
Title (en)
CRANE WITH A LIFTING JIB AND WITH A JIB PUSH-BACK DEVICE
Publication
Application
Priority
FR 8900847 A 19890118
Abstract (en)
[origin: EP0379448A1] This crane is of the type comprising a rotating pivot (5), a jib- holder (6) which is integral with the pivot (5), a mechanism platform (7) connected to the rear of the pivot with a mobile counterweight (8), a lifting jib (9) articulated on the pivot, and means (20, 24) for lifting the jib and for raising weights. According to the invention, there is provided a jib push-back device (16), associated with the platform (7) which is suspended on the jib-holder (6), at the rear, by means of tie rods (14), and, at the front, by means of rodding (15) which also comprises pushers (37), the front of the platform (7) being linked to the pivot (5) by shafts (13) which are mobile in vertical slots (12). When the jib (9) arrives in the lifted position, means of support (54) supported by its foot (17) interact with the pushers (37) and the assembly resists continued movement. Applications: tower cranes, mobile cranes. <IMAGE>
IPC 1-7
IPC 8 full level
B66C 23/06 (2006.01); B66C 23/72 (2006.01); B66C 23/76 (2006.01); B66C 23/92 (2006.01)
CPC (source: EP)
B66C 23/72 (2013.01); B66C 23/92 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0379448 A1 19900725; EP 0379448 B1 19920909; AT E80358 T1 19920915; CN 1018366 B 19920923; CN 1044267 A 19900801; DE 69000289 D1 19921015; DE 69000289 T2 19930318; FR 2641773 A1 19900720; FR 2641773 B1 19910315; JP H02265898 A 19901030
DOCDB simple family (application)
EP 90420018 A 19900111; AT 90420018 T 19900111; CN 90100783 A 19900118; DE 69000289 T 19900111; FR 8900847 A 19890118; JP 74390 A 19900108