Patents by Inventor Darrel L. Turner

Darrel L. Turner 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).

  • Combined mulching and shredding blade
    Patent number: 6487840
    Abstract: A rotary lawn mower blade with improved combined mulching and shredding capability includes an outboard section having a leading cutting edge and a trailing edge. The trailing edge of the outboard section includes a plurality of teeth. The blade also includes a transition section having a leading cutting edge that is at least partially offset relative to the leading cutting edge of the outboard section. The transition section further includes a trailing edge having a partial tooth. Preferably, the plurality of teeth on the outboard section are twisted in either an inboard or an outboard direction. Additionally, the partial tooth can be twisted in an inboard direction. The blade also preferably includes a central mounting portion and an inboard section between the central mounting portion and the transition section. The inboard section also includes a leading cutting edge and a trailing edge.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: December 3, 2002
    Assignee: Fisher Barton, Inc.
    Inventors: Darrel L. Turner, Richard L. Wilkey
  • High hardness boron steel rotary blade
    Patent number: 5916114
    Abstract: A rotary blade for a mower or cutter is formed from boron steel, such as 10B38 steel, and is heat treated to yield high hardnesses of 48 Rockwell C or above. The blade has increased hardness because of the heat treating, but due to the alloy composition, is still sufficiently tough to perform satisfactorily as a cutting blade, in particular to pass conventional impact tests. Furthermore, the low carbon content of the blade makes cold working of the part practical.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: June 29, 1999
    Assignee: Fisher-Barton, Inc.
    Inventor: Darrel L. Turner
  • Rotary cutting blade having a laser hardened cutting edge and a method for making the same with a laser
    Patent number: 5906053
    Abstract: A rotary cutting blade including an elongated body made of steel and having opposite ends, a leading edge extending from each opposite end, an upper surface, a lower surface and a cutting surface extending between the upper and lower surfaces along a portion of the leading edge, and a laser hardened portion extending from an opposite end of the body along the lower surface and the leading edge, the laser hardened portion having a thickness extending toward the upper surface and to the cutting edge.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: May 25, 1999
    Assignee: Fisher Barton, Inc.
    Inventors: Darrel L. Turner, Richard L. Wilkey, Jeffrey O. Russell
  • High hardness boron steel rotary blade
    Patent number: 5899052
    Abstract: A rotary blade for a mower or cutter is formed from boron steel, such as 10B38 steel, and is heat treated to yield high hardnesses of 48 Rockwell C or above. The blade has increased hardness because of the heat treating, but due to the alloy composition, is still sufficiently tough to perform satisfactorily as a cutting blade, in particular to pass conventional impact tests. Furthermore, the low carbon content of the blade makes cold working of the part practical.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: May 4, 1999
    Assignee: Fisher-Barton, Inc.
    Inventor: Darrel L. Turner