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:
Mar. 22, 1994
Filed:
Aug. 14, 1991
Richard J Cunat, Boardman, OH (US);
WCI Steel, Inc., Warren, OH (US);
Abstract
Tunnel liner plate assembly comprising a tunnel liner plate comprising an outer wall and inwardly extending side and end flanges, each having bolt holes therein, and a longitudinally extending plate metal reinforcement extending from end flange to the other and comprising a center section which abuts the outer wall of the liner plate, a pair of upstanding side section which are integrally joined to the center section along respective side edges, and laterally projecting flanges which project laterally from the upper (or inward) edges of the respective side sections. The center section and the side sections together provide a U-shaped configuration and the laterally projecting flanges, which are spaced from the outer plate of the outer wall of the tunnel liner plate and are parallel thereto, afford a marked increase in moment of inertia and section modulus with very little increase in mass. An assembly, or reinforced liner plate, according to this invention has a much greater moment of inertia and much greater section modulus than does an unreinforced liner plate of the same thickness. Correspondingly, the strength of a reinforced tunnel liner plate of this invention is appreciably greater than the strength of an unreinforced tunnel liner plate of the same thickness. Also, the weight of a tunnel liner plate assembly of this invention appreciably less than that of an equivalent unreinforced tunnel plate having the same strength.