Patent US2574171A successfully refreshed from Google Patents.
EP0104150A2
Expired / Lapsed
EP
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Three-dimensional reticulated structure having tapered ends
Assignee: Finarvedi Iniziative Industriali SpA
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Filing: 1983-09-15
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Granted: —
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Expires: 2003-09-15
Abstract
Abstract @ A three-dimensional reticulated structure or space lattice structure is formed of metal rods (1) tapered at their ends so that the loss of cross-section leads to a thickening of the tubular wall (2) of the rod, whereby it can be threaded at its ends (1a) by removal of material without losing mechanical strength. This is preferably attained by coining through at least six successive passes in dies of increasingly smaller dimensions. The knots or junctions are bored metal cups (3), said rods (1) converging into the bores thereof and being fixed simply by bolts (4). A plug (7) of concrete reinforced with steel fibres closes the base of the cup (3) while allowing its reopening for inspection and maintenance, and provides further mechanical strength to the assembly.
Inventors
- 👤 Giovanni Arvedi
- 👤 Giovanni Gosio
- 👤 Renzo Piano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 06:44
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/19; E04B1/1903; E04B1/1906; E04B2001/1924; E04B2001/1927; E04B2001/1957; E04B2001/196; E04B2001/1981; E04B2001/1987; Y; Y10; Y10S; Y10S52/00; Y10S52/10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/342; Y10T403/347
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
108 words
A space lattice structure comprising tubular metal rods in a single piece and junction knots into which at least one of said metal rods converge, characterized by the fact that said single piece rods (1) are tapered and innerly threaded at both their ends (la) with sumultaneous thickening of the wall in said end zone (la), each of said knots being formed as a metal cup (3) open at one end and provided with non-threaded bores, said structure further comprising a knot covering and strengthening element or plug (7) for making the knot indeformable, being removably fixed within each cup (3) in the zone of its greatest diameter
Claim 2
Dependent Claim
108 words
A space lattice structure comprising tubular metal rods in a single piece and junction knots into which at least one of said metal rods converge, characterized by the fact that said single piece rods (1) are tapered and innerly threaded at both their ends (la) with sumultaneous thickening of the wall in said end zone (la), each of said knots being formed as a metal cup (3) open at one end and provided with non-threaded bores, said structure further comprising a knot covering and strengthening element or plug (7) for making the knot indeformable, being removably fixed within each cup (3) in the zone of its greatest diameter
Claim 3
Dependent Claim
45 words
A lattice structure according to claim 1, characterized by the fact that the diameter at the tapered ends (la) of each rod (1) is reduced to about 50% of the initial diameter of the tubular rod, said reduction being obtained by coining in successive stages.
Claim 4
Dependent Claim
23 words
A lattice structure according to claim 2, wherein the successive stages are at least in number of six, in dies of increasing conicity.
Claim 5
Dependent Claim
71 words
A lattice structure according to claim 1, wherein each cup (3) is obtained by cold drawing and comprises in its open zone of greatest diameter a frusto-conical band (3a), of which the major base coincides with the outer edge of said cup, and further comprises a spherical cap zone (3b) connected tothe minor base of said zone (3a), at least one of said zones (3a, 3b) having at least one bore.
Claim 6
Dependent Claim
68 words
A lattice structure according to claim 4, wherein said element or plug (7) is mounted in said cup (3) in a position corresponding to said frusto-conical band (3a) and, in order to mate therewith, its lateral surface is also of frusto-conical configuration, it further comprising a recess along the periphery in a position corresponding with each bore formed in said band (3a), and a central through hole (8).
Claim 7
Dependent Claim
21 words
A lattice structure according to claim 1 or 5, wherein said plug (7) is made of concrete reinforced with steel fibres.
Claim 8
Dependent Claim
61 words
A lattice structure according to claim 1, wherein the end (la) of each rod (1) is fixed to the corresponding cup (3) by means of a bolt (4) screwed therein from the accessible inner side of the cup (3), there being provided washers (6, 6a) of non-parallel surfaces, in contact respectively with the inner and outer surface of the cup (3).
Claim 9
Dependent Claim
75 words
A lattice structure according to claim 1 or 5, further comprising tie rod means (10) for mounting said plug (7) into said cup (3), the tie rod (10) passing through said hole (8) in the plug (7) and being fixed at one end by positioning means (11) in the central point of the spherical cap zone (3b) of the cap, a fastening nut (10a) being also provided at the opposite end of said tie rod.
Claim 10
Dependent Claim
41 words
A lattice structure according to claim 8, wherein said tie rod (10) extends itself outwards beyond a threaded zone provided for the tightening of the nut (10a), by a length such as to allow the fixing of accessory structures and apparatus.
Claim 11
Dependent Claim
10 words
A spatial lattice structure substantially as above described and illustrated.
Claim 12
Dependent Claim
10 words
A spatial lattice structure substantially as above described and illustrated.
References Cited (Backward Citations)
No citation records indexed.
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