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:
Aug. 03, 1982
Filed:
Jul. 10, 1980
Applicant:
Inventor:
Claude C White, Birmingham, AL (US);
Assignee:
Birmingham Bolt Company, Birmingham, AL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
405259 ; 411 24 ; 411 60 ;
Abstract
This is a support assembly for underground mine and tunnel roofs. The assembly includes a tubular member comprising two opposed semi-cylindrical portions, the opposed longitudinal edges on one side of the member being connected together. Portions of the edges on the opposite side of the member are provided with one or more complemental mating angular recesses, which together form a tapered opening in the tubular wall for receiving wedge members. A ram successively engages the wedge members to force the same through the tapered opening, to effect expansion of the tubular member into bonding engagement with the roof.