Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 27, 2009
Patent Application Number
11539654
Date Filed
October 9, 2006
Patent Primary Examiner
Patent abstract
In one aspect of the invention, an apparatus and related methods for installation in a borehole formed in a face of a mine passage comprises an elongated bolt including a spiral shaft portion for positioning in the borehole. A hardened, stationary resin nut formed in only part of the borehole, preferably spaced from the distal end thereof, receives the spiral shaft portion of the bolt. Consequently, rotation of the spiral shaft portion within the hardened resin nut serves to move the bolt within the borehole, such as for purposes of tensioning.
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