Invention Grant
- Patent Title: Loading crane jib
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Application No.: US14018765Application Date: 2013-09-05
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Publication No.: US09718655B2Publication Date: 2017-08-01
- Inventor: Eckhard Wimmer
- Applicant: Palfinger AG
- Applicant Address: AT Salzburg
- Assignee: PALFINGER AG
- Current Assignee: PALFINGER AG
- Current Assignee Address: AT Salzburg
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: ATGM133/2011 20110310
- Main IPC: B66C23/70
- IPC: B66C23/70 ; B66C23/00 ; F15B11/20 ; F15B13/07 ; B66C23/42

Abstract:
A hydraulically actuatable jib for a loading crane includes at least two jib extensions, the first jib extension being designed as an outer jib extension and the second jib extension being designed as an inner jib extension. At least two feed cylinders extend and react the at least two jib extensions. A hydraulic circuit for a working fluid includes a retraction line for retracting the feed cylinders in a pressurized manner, and the retraction line opens into the feed cylinder of the outer jib extension. A tank is provided for releasing the working fluid, and a control valve can be switched into an open position when the outer jib extension reaches a defined retraction position, particularly when the outer jib extension is substantially fully retracted. The valve thereby supplies the feed cylinder of the inner jib extension with pressurized working fluid.
Public/Granted literature
- US20140001140A1 LOADING CRANE JIB Public/Granted day:2014-01-02
Information query
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