Space structures with non-periodic subdivisions of polygonal faces

• US 5,524,396 A
• Filed: 06/10/1993
• Issued: 06/11/1996
• Est. Priority Date: 06/10/1993
• Status: Expired due to Term

• Current Assignee: Haresh Lalvani
• Original Assignee: Haresh Lalvani
• Inventors: Lalvani, Haresh
• Primary Examiner(s): COGGINS, WYNN WOOD
• Application Number:
  US08/075,145
• Time in Patent Office: 1,097 Days
• Field of Search: 52/81.2, 52/311, 52/DIG. 10, 52/81.1
• US Class Current: 52/81.1
• CPC Class Codes: E04B 1/19 Three-dimensional framework structures
• CPC Class Codes: E04B 1/32 Arched structures; Vaulted structures; Folded structures E04B1/345 takes precedence; vaulted roofs E04B7/08
• CPC Class Codes: E04B 2001/1981 characterised by the grid type of the outer planes of the framework
• CPC Class Codes: E04B 2001/199 Details of roofs, floors or walls supported by the framework
• CPC Class Codes: E04B 2001/1993 Details of framework supporting structure, e.g. posts or walls
• CPC Class Codes: E04B 2001/3223 Theorical polygonal geometry therefor
• CPC Class Codes: E04B 2001/3247 Nodes
• CPC Class Codes: E04B 2001/3276 Panel connection details
• CPC Class Codes: E04B 2001/3294 with a faceted surface
• CPC Class Codes: E04B 7/105 Grid-like structures
• CPC Class Codes: Y10S 52/10 Polyhedron

Abstract

A family of space structures having subdivided faces, where such faces are subdivided into rhombii in non-periodic arrangements. The rhombii are derived from regular planar stars with n vectors, and the source space structures are composed of regular polygons. The family includes: globally symmetric structures where the fundamental region is subdivided non-periodically, or globally asymmetric structures composed of regular polygons which are subdivided non-periodically or asymmetrically. The rhombii can be further subdivided periodically or non-periodically. The family further includes all regular polyhedra in the plane-faced and curve-faced states, regular tessellations, various curved polygons, cylinders and toroids, curved space labyrinths, and regular structures in higher-dimensional and hyperbolic space. The structures can be isolated structures or grouped to fill space. Applications include architectural space structures, fixed or retractable space frames, domes, vaults, saddle structures, plane or curved tiles, model-kits, toys, games, and artistic and sculptural works realized in 2- and 3-dimensions. The structures could be composed of individual units capable of being assembled or disassembled, or structures which are cast in one piece, or combination of both. Various tensile and compressive structural systems, and techniques of triangulation could be used as needed for stability.

Claims

1. Curved space structures comprising:

a polygonal structure having p sides, where p is an integer greater than two, wherein

said structure is composed of a plurality of 4-sided and 3-sided polygonal elements, each said element having vertices and edges, and arranged side by side such that two adjacent said elements share one of said edges and said 3-sided polygonal elements lie on the peripheri of said plurality of said 4-sided elements and share said edges with said sides of said polygonal structure

said elements are further arranged such that at least two said vertices of each adjacent said element lie on a continuous curved surface,

said elements, said edges and said vertices are engaged with one another by attachment means, and

where the arrangement of said elements is identical to the arrangement of a plurality of at least two different sets of identical parallelograms and half-parallelograms in a corresponding plane regular polygon with p equal sides and p equal angles such that every said 4-sided element in said curved polygonal structure corresponds to a said parallelogram in said plane polygon and every said 3-sided element in said polygonal structure corresponds to a said half-parallelogram in said plane polygon, wherein said half-parallelograms are obtained by bisecting said parallelograms, wherein

said arrangement of said parallelograms within at least one said polygonal structure includes at least a portion which is non-periodic, and further includes a cluster of more than four said elements around at least two said vertices, wherein

the interior angles of said parallelograms of said sets equal 180°

/n multiplied by `a`, where `a` equals all integers ranging from 1 to n-1, and n equals p, 2p or p/2.

5. Curved space structures as per claim 1, wherein

said polygonal structure has a p-fold symmetry and wherein said non-periodic portion is (1/p)th or (1/2p)th portion of said polygon.

6. Curved space structures as per claim 1, wherein

said polygonal structure has no symmetry.

11. Curved space structures as per claim 1, wherein

said parallelograms are subdivided into two triangles by inserting a diagonal member.

12. Curved space structures as per claim 11, wherein

said triangles are further subdivided into a periodic array of triangles.

14. Curved space structures as per claim 1, wherein

said continuous curved surface is irregular.

15. Curved space structures as per claim 1, wherein

said edges of said polygons are straight or curved.

16. Curved space structures as per claim 1, wherein

said edges of said parallelograms are equal.

17. Curved space structures as per claim 1, wherein

said space structures consist of more than one layer and wherein said layers are inteconnected.

2. Curved space structures comprising:

a plurality of curved polygonal structures, each having p sides, where p is an integer greater than two, and wherein at least two said polygonal structures meet at each said side, wherein

each said polygonal structure is composed of a plurality of 4-sided and 3-sided polygonal elements, each said element having vertices and edges, and arranged side by side such that two adjacent said elements share one of said edges and said 3-sided polygonal elements lie on the peripheri of said plurality of said 4-sided elements and share said edges with said sides of said polygonal structure

said elements are further arranged such that at least two said vertices of each adjacent said element lie on a continuous curved surface,

said elements, said edges and said vertices are engaged with one another by attachment means, and

where the plurality of said curved polygonal structures corresponds to a plurality of plane regular polygons, each with p equal sides and p equal angles, and where the arrangement of said elements within each said polygonal structure is identical to the arrangement of a plurality of at least two different sets of identical parallelograms and half-parallelograms in corresponding said plane regular polygon such that every said 4-sided element in each said curved polygonal structure corresponds to a said parallelogram in corresponding said plane regular polygon and every said 3-sided element in said polygonal structure corresponds to a said half-parallelogram in said plane polygon, wherein said half-parallelograms are obtained by bisecting said parallelograms, wherein

said arrangement of said parallelograms within at least one said polygonal structure includes at least a portion which is non-periodic, and further includes a cluster of more than four said elements around at least two said vertices, wherein

the interior angles of said parallelograms of said sets equal 180°

/n multiplied by `a`, where `a` equals all integers ranging from 1 to n-1, and n equals p, 2p or p/2.

7. Curved space structures as per claim 2, wherein

said polygonal structure has a p-fold symmetry and wherein said non-periodic portion is (1/p)th or (1/2p)th portion of said polygon.

8. Curved space structures as per claim 2, wherein

said polygonal structure has no symmetry.

13. Curved space structures as per claim 2, wherein

said parallelograms are subdivided into two triangles by inserting a diagonal member.

18. Curved space structures as per claim 2, wherein

said plurality of said curved polygonal structures defines a spherical regular polyhedron.

19. Curved space structures as per claim 2, wherein

said plurality of said plane regular polygons defines a regular plane tessellation selected from the group consisting of:

triangular tessellation composed of equilateral triangles,

square tessellation composed of squares, and

hexagonal tessellation composed of regaular hexagons.

20. Curved space structures as per claim 2, wherein

said edges of said parallelograms are equal.

21. Curved space structures as per claim 2, wherein

said space structures consist of more than one layer and wherein said layers are inteconnected.

22. Curved space structures as per claim 2, wherein

said plurality of said curved polygonal structures defines a curved space labyrinth.

23. Curved space structures as per claim 2, wherein

said plurality of said curved polygonal structures defines a plane tessellation composed of plane polygons with curved sides.

24. Curved space structures as per claim 2, wherein

said plurality of said curved polygonal structures defines a regular polyhedron with concave edges.

25. Curved space structures as per claim 13, wherein

said triangles are further subdivided into a periodic array of triangles.

3. Space structures comprising:

a plurality of plane polygonal structures, each having p sides and p angles, wherein at least two said polygonal structures meet at each said side and where p is an integer greater than two, wherein

each said polygonal structure is composed of a plurality of at least two different sets of identical 4-sided and 3-sided polygonal elements, each said element having vertices and edges, and arranged side by side such that two adjacent said elements share one of said edges and said 3-sided polygonal elements lie on the peripheri of said plurality of said 4-sided elements and share said edges with said sides of said polygonal structure wherein

said 4-sided elements are parallelograms and said 3-sided elements are half-parallelograms and where said half-parallelograms are obtained by bisecting said parallelograms,

said elements are further arranged within said polygonal structure such that said vertices and said edges of each adjacent said element lie on a continuous plane surface,

said elements, said edges and said vertices are engaged with one another by attachment means, and

said arrangement of said parallelograms within at least one said polygonal structure includes at least a portion which is non-periodic, and further includes a cluster of more than four said elements around at least two said vertices, wherein

the interior angles of said parallelograms of said sets equal 180°

/n multiplied by `a`, where `a` equals all integers ranging from 1 to n-1, and n equals p, 2p or p/2.

4. Space structures according to claim 3, wherein

said polygonal structures are regular or non-regular polygons.

9. Space structures as per claim 3, wherein

said polygonal structure has a p-fold symmetry and wherein said non-periodic portion is (1/p)th or (1/2p)th portion of said polygon.

10. Space structures as per claim 3, wherein

said polygonal structure has no symmetry.