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:
May. 05, 1987
Filed:
May. 22, 1984
Carl A Clark, Liverpool, NY (US);
John Rogala, Syracuse, NY (US);
Other;
Abstract
A nut element having a frangible portion for use with an elongated bar having an upper end anchored by a resin material within a drill hole in a mine roof, or the like, and a lower end extending outside the hole and threaded to receive the nut element of the invention. The nut includes a portion spaced from the threaded opening which limits relative rotation of the nut and bar. Thus, rotation of the nut with the lower end of the bar contacting the rotation-limiting portion thereof serves to rotate the bar within the drill hole, causing the upper end of the bar to rupture a conventional two-compartment resin cartridge and mix the contents thereof. When the resin has hardened to hold the bar stationary, excess torque applied to the nut serves to break the rotation-limiting portion thereof, preferably a dome-shaped cap with an opening of smaller diameter than the threaded end of the bar, allowing the nut to be snugly secured against a roof support plate and tension the resin-anchored bar.