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US 4,071,992 AGranted
Construction unit
OwnerOtto A. Beckerinventor
Life of this patent
Estimating the term…
Abstract
A loadbearing construction unit which is compression-resistant and bending-resistant and formed of at least one shell and associated support elements. The support elements comprise at least two plate or rodlike elements which are tensioned with respect to each other to obtain a compressive or tensile stress on the elements.
Claims26
A construction unit comprising
- (a) outer shell members defining therebetween a cavity,
- (b) a support core disposed in said cavity and adapted to subject said shells to tensile stress within the planes of said shells, said support core comprising:
- (1) tubular support elements positioned interiorly of said support core and extending parallel to said shells,
- (2) means disposed within and operatively connected to said tubular support elements, said means being adjustable to place said tubular support elements under substantial tensile stress, said stress being transferred to said outer shells through said support core thereby to prestress said shells in the planes thereof.
1 more element
Dependencies are inferred from the claim text.