EP 2683645 B1 20140604 - BOOM OF A LOADING CRANE
Title (en)
BOOM OF A LOADING CRANE
Title (de)
LADEKRAN-AUSLEGER
Title (fr)
FLÈCHE D'UNE GRUE DE CHARGEMENT
Publication
Application
Priority
- AT 1332011 U 20110310
- AT 2012000056 W 20120309
Abstract (en)
[origin: WO2012119169A1] The invention relates to a hydraulically actuatable jib (100) for a loading crane (101), comprising: - at least two jib extensions (1, 2), the first jib extension being designed as an outer jib extension (1) and the second jib extension being designed as an inner jib extension (2), - at least two feed cylinders (11, 21) for extending and retracting the at least two jib extensions (1, 2), - a hydraulic circuit for a working fluid (5), particularly oil, and which comprises a retraction line (6) for retracting the feed cylinders (11, 21) in a pressurised manner, said retraction line (6) opening into the feed cylinder (11) of the outer jib extension (1), - a tank for releasing said working fluid (5), and - a control valve (22) that can be switched into an open position when the outer jib extension (1) reaches a defined retraction position, particularly when the outer jib extension (1) is substantially fully retracted, said valve thereby supplying the feed cylinder (21) of the inner jib extension (2) with pressurised working fluid (5). The working fluid (5) of the retraction line (6), between the tank and the opening (12) at the feed cylinder (11) of the outer jib extension (1), does not come into contact with the feed cylinder (21) of the inner jib extension (2) in any position of said feed cylinder (21) of the inner jib extension (2) until the retraction position of the outer jib extension (1) has been reached.
IPC 8 full level
B66C 23/00 (2006.01); B66C 23/68 (2006.01); B66C 23/70 (2006.01); F15B 11/20 (2006.01); F15B 13/07 (2006.01)
CPC (source: EP RU US)
B66C 23/42 (2013.01 - US); B66C 23/54 (2013.01 - EP US); B66C 23/705 (2013.01 - EP US); F15B 11/205 (2013.01 - EP US); F15B 13/07 (2013.01 - EP US); B66C 23/70 (2013.01 - RU)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012119169 A1 20120913; AT 12645 U1 20120915; AU 2012225180 A1 20130912; AU 2012225180 B2 20170518; BR 112013022490 A2 20161206; CN 103429522 A 20131204; CN 103429522 B 20151021; DK 2683645 T3 20140915; EP 2683645 A1 20140115; EP 2683645 B1 20140604; ES 2498951 T3 20140926; PL 2683645 T3 20141128; RU 2013145351 A 20150420; RU 2610898 C2 20170217; US 2014001140 A1 20140102; US 9718655 B2 20170801
DOCDB simple family (application)
AT 2012000056 W 20120309; AT 1332011 U 20110310; AU 2012225180 A 20120309; BR 112013022490 A 20120309; CN 201280012499 A 20120309; DK 12712877 T 20120309; EP 12712877 A 20120309; ES 12712877 T 20120309; PL 12712877 T 20120309; RU 2013145351 A 20120309; US 201314018765 A 20130905