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:
Apr. 07, 1987
Filed:
Jun. 06, 1984
William L Lane, Viburnum, MO (US);
Donald L Lewis, Belgrade, MO (US);
Other;
Abstract
A rockbolt for installation in a bore in the roof of an underground excavation for supporting a roof, the rockbolt comprising a sleeve and a central member axially disposed and is extending substantially the length of the sleeve thereby defining an annular chamber in the sleeve. The sleeve at its lower end engages a faceplate which engages the roof. The upper end of the sleeve can be secured in the bore with an anchor, as is well known in the art. Ports in the lower end of the sleeve permit the separate introduction of separate components of a hardenable binder material, which mix as they pass up through the annular chamber. The binder is extruded out through ports in the upper end of the sleeve and travels downward filling the annular space between the sleeve and the bore. The binder hardens securing the central member and the sleeve in the bore.