Triangular pyramidal structure, a system and method for fabricating same

Abstract

A triangular pyramidal supporting structure, which has the shape of a tetrahedron made up of elements to form a primary plane, and sloping elements (projecting slopingly upwards from the primary plane and meeting in a junction point. The joining of the elements of the tetrahedron is governed by imaginary lines that are determined by the primary plane. Further, a system has at least four tetrahedrons, and a method for providing the tetrahedron and the system are described.

1 .- 15 . (canceled) 
     
     
         16 . A system comprising at least four triangular pyramidal supporting structures, each of the at least four triangular pyramidal supporting structures comprising:
 a triangular pyramidal supporting structure comprising:
 three primary elements which are connected at three primary joints into an equilateral triangle to form a primary plane; 
 three sloping elements, equal in length, each of the three sloping elements having, in a position of use, a first end portion and a second end portion, the first end portions being attached each to a respective one of the primary joints, and the second end portions being joined together in a junction portion so that the primary elements and the sloping elements form a pyramidal shape, wherein 
   the sloping elements are arranged, in pairs, with an external portion which is parallel to and on an inside of a respective one of three imaginary planes defined by imaginary sloping lines which each extend from an intersection between two and two imaginary lines which are coaxial with a respective one of outer, upper edge lines of a respective primary element, and beyond an end portion of the junction portion, the imaginary lines being longer than the primary elements so that said intersection is on an outside of the first end portions of the sloping elements, the three imaginary planes each touching a portion of a respective primary element so that the sloping elements are arranged within the imaginary planes, wherein:   the intersections of imaginary lines of the primary planes of at least three of the at least four triangular supporting structures are placed adjacent to each other in a first plane, so that two of the intersections of the imaginary lines of each of the primary planes are adjacent to two of the intersections of the imaginary lines of the two other triangular supporting structures in order thereby to form an open, equilateral triangle defined between the intersections of the imaginary lines of the three triangular supporting structures; and   the intersections between two and two of the imaginary lines of the primary plane of the at least fourth triangular supporting structure each coincide with a respective one of the intersections of the sloping elements so that the primary plane of the at least fourth triangular supporting structure is carried in a second plane above said first plane, and the system defines a tetrahedron determined by the imaginary lines of the system.   
     
     
         17 . The system in accordance with  claim 16 , wherein the triangular supporting structures are regular tetrahedrons. 
     
     
         18 . The system according to  claim 16 , wherein the primary joints in the primary plane of the triangular structure or structures that are placed against underlying triangular supporting structures are formed with cut-outs that are complementarily adapted for the junction point of each of the three triangular pyramidal supporting structures carrying the one or more triangular structures, so that the primary joints of the one or more triangular supporting structures that are being carried, enclose a portion of said junction point. 
     
     
         19 . The system according to  claim 16 , wherein the supporting structure further comprises three secondary elements that are attached to portions of the sloping elements between the primary joints and the junction portion to form a secondary plane, and wherein each of the secondary elements has at least three sides, at least one side of which is parallel to the primary plane and faces away from the primary plane, the at least one side being defined by an outer edge line and an inner edge line, and wherein
 at least the outer edge line of each of the secondary elements is coaxial with a respective imaginary line lying in a respective one of the three imaginary planes.   
     
     
         20 . The system according to  claim 16 , wherein the supporting structure further comprises three secondary elements that are attached to portions of the sloping elements between the primary joints and the junction portion to form a secondary plane which is parallel to the primary plane, imaginary lines touching top portions of the secondary elements and extending beyond end portions of the secondary elements. 
     
     
         21 . The system according to  claim 16 , wherein at least some of the elements of the supporting structure are joined together by means of mountings. 
     
     
         22 . The system according to  claim 21 , wherein the mountings comprise sleeve-shaped portions configured for, at least partly, enclosing an end portion of the element or each of the elements of the supporting structure. 
     
     
         23 . The system according to  claim 19 , wherein the secondary elements have a cross section shaped like a parallelogram, one side face of each of the secondary elements being placed in the same plane as the imaginary lines. 
     
     
         24 . The system according to  claim 19 , wherein the secondary elements have a cross section with an endless surface. 
     
     
         25 . The system according to  claim 16 , wherein a cross-sectional area of the sloping elements is larger at the first end portion than at the second end portion. 
     
     
         26 . A method for providing the system according to  claim 16 , the method comprising:
 planning the triangular pyramidal supporting structures forming the structure by means of imaginary lines defining a tetrahedron,   the imaginary lines being defined by:   three imaginary lines being coaxial with a respective one of outer, upper edge lines of primary elements, the imaginary lines being longer than the primary elements so that two and two of the imaginary lines form intersections defining a primary plane;   three sloping imaginary lines extending from a respective one of the intersections of the imaginary lines forming the imaginary plane, the sloping imaginary lines intersect in a point;   wherein the imaginary lines and the sloping imaginary lines defining a first imaginary plane, a second imaginary plane, and a third imaginary plane;   connecting the primary elements at the primary joints to form an equilateral triangle in the primary plane, so that the upper edge lines of primary elements coincides with the imaginary lines;   connecting the first end portions of the sloping elements to a primary joint each, and connecting the second end portions of the sloping elements in a junction portion; and   arranging the external portions of the sloping elements in pairs in parallel with and on an inside of a respective one of the first, second and third imaginary planes, so that an end portion of the junction portion is on an inside of said first, second and third imaginary planes, the method further comprising:   placing at least three of the intersections of the imaginary lines of the primary planes of said at least three of the at least four triangular supporting structures adjacent to each other in a first plane, so that two of the intersections of the imaginary lines of each of the primary planes are adjacent to two of the intersections of the imaginary lines of the two other triangular supporting structures in order thereby to form an open, equilateral triangle defined between the intersections of the imaginary lines of the three triangular supporting structures; and   placing the intersections between two and two of the imaginary lines of the primary plane of the at least fourth triangular supporting structure in positions coinciding each with a respective one of the intersections of the sloping elements so that the primary plane of the at least fourth triangular supporting structure is supported in a second plane above said first plane, and the system defines a tetrahedron determined by the imaginary lines of the system.   
     
     
         27 . The system according to  claim 17 , wherein the primary joints in the primary plane of the triangular structure or structures that are placed against underlying triangular supporting structures are formed with cut-outs that are complementarily adapted for the junction point of each of the three triangular pyramidal supporting structures carrying the one or more triangular structures, so that the primary joints of the one or more triangular supporting structures that are being carried, enclose a portion of said junction point. 
     
     
         28 . The system according to  claim 17 , wherein the supporting structure further comprises three secondary elements that are attached to portions of the sloping elements between the primary joints and the junction portion to form a secondary plane which is parallel to the primary plane, imaginary lines touching top portions of the secondary elements and extending beyond end portions of the secondary elements. 
     
     
         29 . The system according to  claim 18 , wherein the supporting structure further comprises three secondary elements that are attached to portions of the sloping elements between the primary joints and the junction portion to form a secondary plane which is parallel to the primary plane, imaginary lines touching top portions of the secondary elements and extending beyond end portions of the secondary elements. 
     
     
         30 . The system according to  claim 20 , wherein the secondary elements have a cross section shaped like a parallelogram, one side face of each of the secondary elements being placed in the same plane as the imaginary lines. 
     
     
         31 . The system according to  claim 21 , wherein the secondary elements have a cross section shaped like a parallelogram, one side face of each of the secondary elements being placed in the same plane as the imaginary lines. 
     
     
         32 . The system according to  claim 22 , wherein the secondary elements have a cross section shaped like a parallelogram, one side face of each of the secondary elements being placed in the same plane as the imaginary lines. 
     
     
         33 . The system according to  claim 20 , wherein the secondary elements have a cross section with an endless surface. 
     
     
         34 . The system according to  claim 21 , wherein the secondary elements have a cross section with an endless surface. 
     
     
         35 . The system according to  claim 22 , wherein the secondary elements have a cross section with an endless surface.