The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1989
Filed:
Sep. 26, 1986
Kabushiki Kaisha Kobe Seiko Sho, Kobe, JP;
Abstract
A concrete reinforcing steel fiber has an alternate arrangement of basic portions corresponding to the body of the steel fiber material, and section-shaped portions formed by pressing the steel fiber material between a grooved forming roller and a toothed forming roller. Each section-shaped portion has a flat upper surface, lateral projections and a round bottom. The pressure bearing area b of the section-shaped portion, namely, the sum of the cross-sectional area of the lateral projections and the area of the end surface of the basic portion contiguous with the section-shaped portion, is in the range of 0.2A to 0.5A (A=cross-sectional area of the basic portion). The total pressure bearing area B of the steel fiber is in the range of 3A and 8A, and also in the range of 0.02T and 0.08T (T=tensile strength of the steel fiber).