IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0403802
(2009-03-13)
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등록번호 |
US-8505184
(2013-08-13)
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발명자
/ 주소 |
- Pirri, Nicola
- Cipolla, Davide
- Cortellini, Mauro Marco
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출원인 / 주소 |
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대리인 / 주소 |
Novak Druce Connolly Bove + Quigg LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
13 |
초록
▼
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 element
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.
대표청구항
▼
1. 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 au
1. 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. 2. The method as in claim 1, wherein said constant section is substantially rectangular. 3. The method as in claim 1, wherein said constant section is substantially trapezoidal, with an inclination of sides thereof at an angle between 0.3° and 1.5°. 4. The method as in claim 1, wherein said auxiliary elements are made of composite material and are obtained using a male type mold. 5. The method as in claim 1, wherein said polymerization is performed in an autoclave. 6. The method as in claim 1, wherein forming each of said plurality of main girders further comprises the insertion of metal inserts and/or reinforcements between layers of composite material to allow connection of the segment to an adjacent segment. 7. The method as in claim 1, wherein forming each of said plurality of main girders further comprises the making of holes, on at least one of the sides of a girder, for the positioning of metal bushings for the insertion and positioning of connection pins between the segments. 8. The method as in claim 1, wherein forming each if said plurality of main girders further comprises the making of a thicker part, in at least one zone of the perimeter of a girder, for the positioning of a support for said pipe. 9. The method as in claim 1, wherein said auxiliary elements are attached on each girder so as to form a relative segment. 10. The method as in claim 1, wherein the production of said auxiliary elements comprises the insertion of metal inserts and/or reinforcements between layers of composite material to allow the connection of the segment to an adjacent segment. 11. The method as in claim 1, further comprising gluing connection elements to adjacent segments and/or the attachment elements of the movement devices onto the relative anchorage zones of the segments. 12. The method as in claim 11, wherein said gluing is associated with an aspiration of air bubbles. 13. The method as in claim 12, wherein said gluing is associated with mechanical connection by means of riveting. 14. The method as in claim 1, wherein the mold used in the forming of a girder comprises at least an end conformed so as to obtain a shape suitable for direct connection between adjacent segments. 15. The method as in claim 1, wherein the composite material used is of a woven and/or unidirectional type made of low modulus carbon.
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