A node structure (12, 14) for connecting two or more convergent members (16, 26) of a lattice frame to each other and to one or more other members of the lattice frame. The node structure (12, 14) comprises a pair of opposed spaced-apart faces (30) that are substantially planar and substantially par
A node structure (12, 14) for connecting two or more convergent members (16, 26) of a lattice frame to each other and to one or more other members of the lattice frame. The node structure (12, 14) comprises a pair of opposed spaced-apart faces (30) that are substantially planar and substantially parallel to each other. At least one pair of root formations (32) with respective central longitudinal axes define an interior angle between them, those axes diverging outwardly for alignment with respective members of the lattice frame and converging inwardly between the faces (30). An inner connecting wall (34) between the root formations (32) of the pair connects concave-curved inner edges (36) of the faces and extends in a concave curve around the interior angle to join the root formations (32) of that pair.
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1. A method of fabricating a node structure for a lattice frame, the method comprising: cutting a pair of faces from sheet or plate material so that each face has a concave-curved edge:positioning the pair of faces in an opposed, spaced-apart arrangement: providing a concave-curved connecting wall:c
1. A method of fabricating a node structure for a lattice frame, the method comprising: cutting a pair of faces from sheet or plate material so that each face has a concave-curved edge:positioning the pair of faces in an opposed, spaced-apart arrangement: providing a concave-curved connecting wall:connecting the pair of opposed spaced-apart faces with the concave-curved connecting wall by joining the connecting wall to the concave-curved edges of the faces: forming at least first and second transition sections that have a rectangular cross-section that varies in an outward direction to terminate in a circular cross-section; and connecting the first and second transition sections to opposing ends of the concave-curved connecting wall. 2. The method of claim 1, comprising the preliminary step of bending or forging a U- or C-section or cutting longitudinally along an inner concave curve of a bent tube or a bent or forged U- or C-section to define one or more double-curved parts of the concave-curved connecting wall. 3. A method of fabricating a node structure for a lattice frame, the method comprising: cutting a pair of faces from sheet or plate material so that each face has a concave-curved edge;positioning the pair of faces in an opposed, spaced-apart arrangement; providing a concave-curved connecting wall; connecting the pair of opposed spaced-apart faces with the concave-curved connecting wall by joining the concave-curved connecting wall to the concave-curved edges of the faces providing at least first and second root formations;connecting the first root formation to a first end of the concave-curved connecting wall, and the second root formation to a second end of the concave-curved connecting wall;providing first and second end connecting walls, each with inner edges and straight end edges;connecting the first end connecting wall to a straight end edge of one of the pair of spaced-apart faces and also to the first root formation; andconnecting the second end connecting wall to a straight end edge of the other of the pair of opposed spaced-apart faces and also the second root formation. 4. The method of claim 3, comprising the preliminary step of bending or forging a U- or C-section or cutting longitudinally along an inner concave curve of a bent tube or a bent or forged U- or C-section to define one or more double-curved parts of the concave-curved connecting wall. 5. The method of claim 3, wherein positioning the pair of faces further comprises positioning the pair of faces substantially parallel to each others. 6. The method of claim 3 wherein providing the concave-curved connecting wall further comprises providing the concave-curved connecting wall having a concave curvature that follows an elliptical, parabolic or hyperbolic path between the first and second root formations. 7. The method of claim 3, wherein providing the concave-curved connecting wall further comprises providing at least one double-curved part of convex cross-section, when viewed externally, that extends around an interior angle and is bounded by at least one of the concave-curved edges of the faces. 8. The method of claim 7, wherein providing the at least one double-curved part further comprises providing the double-curved part that is part-toroidal. 9. The method of claim 7, wherein providing the at least one double-curved part further comprises providing the double-curved part that is of semi-circular, quarter-circular or other part-elliptical cross-section. 10. The method claim 9, wherein providing the first and second root formations further comprises providing the first and second root formations having radii of cross-sectional curvature substantially identical to a radius of cross-sectional curvature of the double-curved part. 11. The method of claim 7, further comprising connecting the double-curved part to the faces and bounding the double-curved part by concave-curved inner edges of both faces. 12. The method of claim 1, further comprising connecting the concave-curved connecting wall to a central concave-curved strip of flat cross-section bounded along each side by double-curved parts, each of which joins the concave-curved strip to a concave-curved inner edge of a respective face of the pair. 13. The method of claim 7, further comprising fabricating the node structure from metal parts, wherein the, or each, double-curved part is defined by a metal part of semi-circular or quarter-circular cross section. 14. The method of claim 3, further comprising providing each face with an outer edge opposed to the concave-curved edge, and end edges each diverging from the concave-curved edge to the outer edge. 15. The method of claim 3, wherein connecting the first and second end connecting walls further comprises connecting the faces are by end connecting walls outboard of the first and second root formations, each end connecting wall having an inner edge adjoining the respective root formation and an outer edge in continuity with the outer edges of the faces. 16. The method of claim 3, further comprising positioning the outer edges of the faces and the end connecting walls together define a seat recess shaped for joining the node structure to another member of the lattice frame. 17. The method of claim 16, wherein positioning the outer edges further comprises positioning the seat recess having a central longitudinal axis generally parallel with planes of the faces. 18. The method of claim 3, wherein connecting the first and second end connecting walls further comprises connecting the end connecting walls having a convex semi-circular or other part-elliptical cross-section extending between the faces. 19. The method of claim 3, wherein positioning the faces further comprises positioning the faces substantially parallel to a plane containing the central longitudinal axes of the first and second root formations. 20. The method of claim 1, further comprising: connecting at least four root formations with respective central longitudinal axes defining interior angles between each adjacent pair of root formations; andconnecting at least four inner connecting walls, each joining the root formations of each respective adjacent pair. 21. The method of claim 1, further comprising connecting the faces by at least one internal bulkhead spaced from the inner connecting wall. 22. The method of claim 21, wherein the bulkhead comprises a tube extending between the faces on an axis substantially orthogonal to the central longitudinal axes of root formations. 23. The method of claim 3, wherein providing the first and second root formations further comprises at least one of the first and second root formations being tubular. 24. The method of claim 3, wherein providing the first and second root formations and the inner connecting wall further comprises bending a tube from which an outer convex curve part is removed to fit the concave-curved inner edges of the pair of opposed spaced-apart faces.
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이 특허에 인용된 특허 (6)
Wood Anthony,GB2, Cast nodes and patterns for their production.
Stol Israel (Mount Lebanon PA) Long Russell S. (Pittsburgh PA) Klingensmith James D. (Apollo PA), Method of joining of hollow framework and associated frame assembly.
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