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US 4,063,725 AGranted
Foldable cube forming geometric device
OwnerThomas A. Snyderinventor
Life of this patent
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Abstract
A changeable-configuration geometric device including four right tetrahedrons hinged together with an equilateral tetrahedron in such a manner that the various tetrahedrons may be swung relative to one another to form an infinite number of different overall configurations for the device. One configuration which is producible is that of an equilateral cube, in which configuration the equilateral tetrahedron forms the central core of the cube.
Claims7
A changeable-configuration geometric device comprising
- an equilateral tetrahedron having edges defining a plurality of equilateral triangular faces,
- four right tetrahedrons each having edges defining an equilateral triangular face of substantially the same size as each face in said equilateral tetrahedron, and
- means hinging each of said tetrahedrons to another tetrahedron, whereby said tetrahedrons may be swung relative to one another to produce an infinite number of overall configurations for said device, one of said configurations taking the form of an equilateral cube, with said one configuration resulting from each of said equilateral triangular faces in said right tetrahedrons being positioned in confronting, abutting congruent relationship with a different face in said equilateral tetrahedron.
Dependencies are inferred from the claim text.