Patents by Inventor Martin Koorn

Martin Koorn 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).

  • Mowing device, a knife adapter for such a mowing device, a retainer for such a mowing device and method of using same
    Patent number: 7966795
    Abstract: A mowing device including a disc, the disc providing a mount for at least one knife, said knife being pivotably mounted to said disc by a pivot pin, said pivot pin defining a mounting axis, such that the knife can rotate about said pivot pin between a first extended position and any retracted position, said disc being constructed of a basic material thickness and comprising a mounting surface; said mowing device including a knife adapter comprising a cylindrical aperture and a projection; said pivot pin comprising a first cylindrical section of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section, of a second diameter, with a groove defined by a groove width and a pin section thickness at the groove of a dimension less than said second diameter; said mowing device including a retainer constructed of a material thickness equal to or less than the width of said groove, with a key-hole shaped aperture defined by a first circular section with a first insid
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: June 28, 2011
    Assignee: Vermeer Manufactruing Company
    Inventors: Kent Thompson, Rustin V. Bentzinger, Martin Koorn
  • MOWING DEVICE, A KNIFE ADAPTER FOR SUCH A MOWING DEVICE, A RETAINER FOR SUCH A MOWING DEVICE AND METHOD OF USING SAME
    Publication number: 20100205925
    Abstract: A mowing device including a disc, the disc providing a mount for at least one knife, said knife being pivotably mounted to said disc by a pivot pin, said pivot pin defining a mounting axis, such that the knife can rotate about said pivot pin between a first extended position and any retracted position, said disc being constructed of a basic material thickness and comprising a mounting surface; said mowing device including a knife adapter comprising a cylindrical aperture and a projection; said pivot pin comprising a first cylindrical section of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section, of a second diameter, with a groove defined by a groove width and a pin section thickness at the groove of a dimension less than said second diameter; said mowing device including a retainer constructed of a material thickness equal to or less than the width of said groove, with a key-hole shaped aperture defined by a first circular is section with a first in
    Type: Application
    Filed: April 30, 2010
    Publication date: August 19, 2010
    Inventors: Kent Thompson, Rustin V. Bentzinger, Martin Koorn
  • Method for changing knives in a mower
    Patent number: 7743478
    Abstract: A mowing device including a disc, the disc providing a mount for at least one knife, said knife being pivotably mounted to said disc by a pivot pin, said pivot pin defining a mounting axis, such that the knife can rotate about said pivot pin between a first extended position and any retracted position, said disc being constructed of a basic material thickness and comprising a mounting surface; said mowing device including a knife adapter comprising a cylindrical aperture and a projection; said pivot pin comprising a first cylindrical section of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section, of a second diameter, with a groove defined by a groove width and a pin section thickness at the groove of a dimension less than said second diameter; said mowing device including a retainer constructed of a material thickness equal to or less than the width of said groove, with a key-hole shaped aperture defined by a first circular section with a first insid
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: June 29, 2010
    Assignee: Vermeer Manufacturing Co.
    Inventors: Kent Thompson, Rustin V. Bentzinger, Martin Koorn
  • Method for changing knives in a mower
    Publication number: 20090094812
    Abstract: A mowing device including a disc, the disc providing a mount for at least one knife, said knife being pivotably mounted to said disc by a pivot pin, said pivot pin defining a mounting axis, such that the knife can rotate about said pivot pin between a first extended position and any retracted position, said disc being constructed of a basic material thickness and comprising a mounting surface; said mowing device including a knife adapter comprising a cylindrical aperture and a projection; said pivot pin comprising a first cylindrical section of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section, of a second diameter, with a groove defined by a groove width and a pin section thickness at the groove of a dimension less than said second diameter; said mowing device including a retainer constructed of a material thickness equal to or less than the width of said groove, with a key-hole shaped aperture defined by a first circular section with a first insid
    Type: Application
    Filed: December 17, 2008
    Publication date: April 16, 2009
    Inventors: Kent Thompson, Rustin V. Bentzinger, Martin Koorn
  • Mowing device, a knife adapter for such a mowing device and a retainer for such a mowing device
    Patent number: 7490459
    Abstract: A mowing device including a disc, the disc providing a mount for at least one knife, said knife being pivotably mounted to said disc by a pivot pin, said pivot pin defining a mounting axis, such that the knife can rotate about said pivot pin between a first extended position and any retracted position, said disc being constructed of a basic material thickness and comprising a mounting surface; said mowing device including a knife adapter comprising a cylindrical aperture and a projection; said pivot pin comprising a first cylindrical section of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section, of a second diameter, with a groove defined by a groove width and a pin section thickness at the groove of a dimension less than said second diameter; said mowing device including a retainer constructed of a material thickness equal to or less than the width of said groove, with a key-hole shaped aperture defined by a first circular section with a first insid
    Type: Grant
    Filed: February 22, 2005
    Date of Patent: February 17, 2009
    Assignee: Vermeer Manufacturing Company
    Inventors: Kent Thompson, Rustin V. Bentzinger, Martin Koorn
  • Mowing device, a knife adapter for such a mowing device and a retainer for such a mowing device
    Publication number: 20050138913
    Abstract: A mowing device including a disc, the disc providing a mount for at least one knife, said knife being pivotably mounted to said disc by a pivot pin, said pivot pin defining a mounting axis, such that the knife can rotate about said pivot pin between a first extended position and any retracted position, said disc being constructed of a basic material thickness and comprising a mounting surface; said mowing device including a knife adapter comprising a cylindrical aperture and a projection; said pivot pin comprising a first cylindrical section of a first diameter to fit into said cylindrical aperture in said knife adapter, and a second cylindrical section, of a second diameter, with a groove defined by a groove width and a pin section thickness at the groove of a dimension less than said second diameter; said mowing device including a retainer constructed of a material thickness equal to or less than the width of said groove, with a key-hole shaped aperture defined by a first circular section with a first insid
    Type: Application
    Filed: February 22, 2005
    Publication date: June 30, 2005
    Inventors: Kent Thompson, Rustin Bentzinger, Martin Koorn