Patent ID: 8505184

Claim:
A method for making an arm for the distribution of concrete or other similar material by a work vehicle, said arm comprising a plurality of segments each selectively foldable and extendible with respect to others of said plurality of segments, each of said segments comprising a main girder and auxiliary elements for connection to adjacent segments or for attachment of movement and/or supporting devices for a pipe that carries the concrete or other similar material, the method comprising: forming each of a plurality of main girders with predefined lengths, by depositing a plurality of layers of pre-impregnated composite material in a female type mold, wherein a number of layers of said plurality of layers varies according to a desired resistance and/or rigidity of the main girder formed thereby; subjecting the deposited composite material to polymerization; removing each main girder from its mold, associating auxiliary elements with each girder so as to form a relative segment; assembling the extendible arm by connecting the various segments at respective thereof, wherein a cross section of each of said main girders of said segments is substantially constant over the whole length thereof and wherein said female mold comprises a number of elementary molds of equal section, connected in sequence with each other according to the overall length of the main girder to be made.