Cifa S.p.a.

Zoomlion Heavy Industry Science and Technology Co., Ltd

Mauro Marco Cortellini

Paolo Dario Maini

Nicola Pirri

Emanuele Zorzi

Alessandro Macera

Francesco Ripamonti

Davide Cipolla

Paolo Francesco Ragaini

Domenico Mottarella

Stefano Beretta

Andrea Bernasconi

Alessandro Tosi

Sergio Lorenzi

Guihong Wang

Jianhui Chen

Guojun Zhang

Massimo Mantineo

Stefano Ferri

Luigi Coppola

Ferruccio Resta

Fabio Ferrè

Auxiliary extension device for a crane provided with a telescopic extendable arm having at least one end segment provided with a free end, wherein the auxiliary extension device is made of one or more composite materials.

Auxiliary device for a crane and crane comprising said auxiliary device

An arm made of composite material, and relative production method, consisting of a plurality of articulated segments with a longitudinal main axis (x), pivoted to each other, each of the articulated segments comprising a box-like structure and at least a joint element attached thereto by means of gluing, the box-like structure having an end cooperating with an end of the joint element on the inside of the surface of the joint element. The ends define a substantially conical reciprocally overlapping area and have profiles concordantly inclined by an angle (&#x3b1;) with respect to the longitudinal axis (x).

Arm made of composite material and relative production method

A method to make an arm for the distribution of concrete, or other material similar to concrete, used on heavy work vehicles, wherein the arm comprises a plurality of segments selectively folding and extendible one with respect to the other. Each segment comprises a main girder and auxiliary elements for connection to adjacent segments or for attachment of movement and/or supporting devices for the pipe that carries the concrete. The method comprises a first step in which each main girder is formed, with a predefined length, by depositing a plurality of layers of pre-impregnated composite material in a female type mold. The method comprises a second step in which the composite material, deposited in layers in the mold in a variable number of layers, is subjected to polymerization. The method comprises a third step in which each main girder is removed from the mold and a fourth step in which the auxiliary elements are associated with each girder so as to form a relative segment. The method comprises a fifth step in which the extendible arm is assembled, connecting the various segments at the respective ends. The cross section of each of the main girders of the segments is substantially constant over the whole length thereof. The female mold consists of one or more elementary molds of equal section, connected in sequence with each other according to the overall length of the main girder to be made.

Method to make an arm for the distribution of concrete, and arm thus made

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Rozzano, Italy

Mauro Marco Cortellini