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US 4,308,705 AGranted
Reinforcing element
OwnerWalter Hufnaglinventor
Life of this patent
Estimating the term…
Abstract
A reinforcing rod or wire is formed with a plurality of helical and longitudinally continuous grooves. At least one of these grooves is of varying width and/or depth, and similarly may have a varying cross-sectional shape.
Claims8
An elongated reinforcing element, comprising a rod having a longitudinal axis and formed with at least two continuously and helically extending grooves each having two outwardly open ends and predetermined width and depth dimensions, said grooves extending at 45.degree. to said longitudinal axis of said element, at least said width dimension of at least one of said grooves varying periodically along the length of said one groove.
Dependencies are inferred from the claim text.