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Conical seismic anchor and drill bit for use with unreinforced masonry structures

  • US 5,085,026 A
  • Filed: 11/20/1990
  • Issued: 02/04/1992
  • Est. Priority Date: 11/20/1990
  • Status: Expired due to Fees
First Claim
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1. A process for attaching a seismic anchor to a wall of an unreinforced masonry structure, the steps comprising:

  • drilling a generally frusto-conical cavity into the wall;

    inserting a seismic anchor into the cavity, the seismic anchor including an attachment support rod having a first end and an adjacent portion thereof threaded for receiving a nut, and a frusto-conical plug having a larger end and a smaller end, placed over, surrounding and fixed to the support rod such that the larger end of the plug is situated next to the threaded end and adjacent portion of the support rod, such that the exterior frusto-conical surface of the plug fully engages the interior frusto-conical surfaces of the wall cavity; and

    securing the seismic anchor within the wall cavity.

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