Patents by Inventor Leonard J. Groves

Leonard J. Groves 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).

  • Adjustable microwave field stop
    Patent number: 6242726
    Abstract: An improved magnetic field stop. The field stop adjusts to allow different sizes of products to be passed through a microwave heating system. The field stop prevents undue radiation from escaping a heating chamber which is used in a microwave heating process for a variety of substrates.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: June 5, 2001
    Inventors: George M. Harris, Peter Robicheau, Leonard J. Groves
  • Apparatus and method for microwave curing of resins in engineered wood products
    Patent number: 5892208
    Abstract: An apparatus, system, and method, for using circular mode magnetic microwave energy to heat the interior regions of a work piece of wood fiber and glue. The microwaves are generated and transmitted as rectangular waveguide mode microwave energy, and are converted by mode converter to circular magnetic mode microwave energy. As circular magnetic mode microwave energy, the microwave energy passes through a work piece or billet of material is reflected on the other side, and travels through the billet a second time. Reflected microwave energy from the main reflected wave as well as reflections from other structures, surfaces and layers in the system travel back toward the microwave source. They are sensed, and a computer tuning system causes capacitive probes to generate offsetting microwave reflections, which are opposite in phase and equal in magnitude to the sum of all of the reflected waves.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: April 6, 1999
    Assignee: Ewes Enterprises
    Inventors: George M. Harris, Peter Robicheau, Leonard J. Groves, Deepay Mukerjee
  • Apparatus and method for microwave curing of resins in engineered wood products
    Patent number: 5756975
    Abstract: An apparatus, system, and method, for using circular mode magnetic microwave energy to heat the interior regions of a work piece of wood fiber and glue. The microwaves are generated and transmitted as rectangular waveguide mode microwave energy, and are converted by mode converter to circular magnetic mode microwave energy. As circular magnetic mode microwave energy, the microwave energy passes through a work piece or billet of material is reflected on the other side, and travels through the billet a second time. Reflected microwave energy from the main reflected wave as well as reflections from other structures, surfaces and layers in the system travel back toward the microwave source. They are sensed, and a computer tuning system causes capacitive probes to generate offsetting microwave reflections, which are opposite in phase and equal in magnitude to the sum of all of the reflected waves.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: May 26, 1998
    Assignee: Ewes Enterprises
    Inventors: George M. Harris, Peter Robicheau, Leonard J. Groves, Deepay Mukerjee