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:
Nov. 08, 2011
Filed:
Jun. 27, 2008
John G. Oldsen, Butler, PA (US);
John C. Stankus, Canonsburg, PA (US);
Demrey G. Brandon, Pittsburgh, PA (US);
Joey B. Blankenship, Bluefield, WV (US);
John G. Oldsen, Butler, PA (US);
John C. Stankus, Canonsburg, PA (US);
Demrey G. Brandon, Pittsburgh, PA (US);
Joey B. Blankenship, Bluefield, WV (US);
FCI Holdings Delaware, Inc., Wilmington, DE (US);
Abstract
A mine roof support includes a plate having a raised portion with an opening, and a mine and roof bolt, e.g. a barrel having a drive end and an opposite second end, and wedge assembly. The plate mates with a recess in a mine roof. In one embodiment, the second end of the barrel extends through the opening in the dome into a bore hole in the mine roof. In another embodiment, a second end of the mine bolt is contoured to match and fill the inner contour of the dome. A drill bit tool used to shape the recess includes a first bit, a second bit, and a third bit between the first and second bits to drill a bore hole, enlarge the end of the bore hole to receive the second end of the mine bolt, and to drill the recess.