Patents by Inventor Chad Grenner

Chad Grenner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140219736
    Abstract: A breakage resistant hole saw that reduces damage of the pilot hole drill bit caused by the sudden contact of the cutting teeth on the hole saw's cutting body against the hard working surface after the drill bit has penetrated through the working surface. The hole saw disclosed herein includes a cylindrical cutting body mounted on an arbor. Formed on the circular lower edge of the cutting body is a plurality of angled teeth that cut through a working surface when rotated in one direction. Mounted on the end of the arbor is a pilot hole drill bit with a spiral cutting flute configured at a spiral cutting angle to penetrate the working surface when rotated in a direction opposite the cutting direction of the cutting teeth on the cutting body. Also disclosed herein is a method for forming a hole using a hole saw that reduces damage to the pilot hole drill bit.
    Type: Application
    Filed: February 7, 2013
    Publication date: August 7, 2014
    Inventor: Chad Grenner