Composite material jib

Details Composite material jib Composite material jib

B - Operations, Transporting

66

C

B66C 23/64 (2006.01) B66C 23/687 (2006.01) B66C 23/70 (2006.01)

Patent

CA 2276925

At least one section of a jib of a crane, such as a mobile crane, includes a composite cross-section incorporating a layer of steel [11] covered by one or more fiber composite layers [12]. In a preferred embodiment, more than one fiber composite layer [12, 13] is included and the respective fiber layers are disposed in a criss-cross manner with respect to each other to enhance the overall strength of the telescopic part. Also, in a preferred embodiment the steel layer [11] of the composite is on the interior of the telescopic part for minimizing thermal stresses due to temperature changes caused by sun loads. In another preferred embodiment, the composite fiber layers are disposed only in the zone of the cross-section of the telescopic part, which is subjected to tensile forces during use.

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