Patents by Inventor Robert P. Ziehm

Robert P. Ziehm 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).

  • Stump grinder apparatus
    Patent number: 6708743
    Abstract: A stump-grinding apparatus includes a block having an inner surface and an outer surface. The inner surface is adjacent to a side of the wheel between the center of wheel and the peripheral edge. The outer surface defines both a groove and a first aperture in the groove. A tooth is received into the groove. The tooth has a first end and a second end spaced from the first end. The second end defines a second aperture that can align with the first aperture. A fastener extends through the first and second aperture to fasten the tooth to the block.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: March 23, 2004
    Assignee: Bucktooth Grinding Company LLC
    Inventor: Robert P. Ziehm
  • Stump grinder apparatus
    Publication number: 20030209285
    Abstract: A stump-grinding apparatus includes a block having an inner surface and an outer surface. The inner surface is adjacent to a side -of the wheel between the center of wheel and the peripheral edge. The outer surface defines both a groove and a first aperture in the groove. A tooth is received into the groove. The tooth has a first end and a second end spaced from the first end. The second end defines a second aperture that can align with the first aperture. A fastener extends through the first and second aperture to fasten the tooth to the block.
    Type: Application
    Filed: May 7, 2002
    Publication date: November 13, 2003
    Inventor: Robert P. Ziehm