Patents by Inventor Richard K. Nelson

Richard K. Nelson 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).

  • Air filter arrangement; assembly; and, methods
    Patent number: 11951429
    Abstract: Air filter cartridges are disclosed. Also described are air cleaners including the filter cartridges. Methods of assembly and use are also provided. Also, systems of use are described.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: April 9, 2024
    Assignee: Donaldson Company, Inc.
    Inventors: Gregory Reichter, Wayne Bishop, Benny K. Nelson, Darrel Wegner, Bruce Crenshaw, Thomas Miller, Donald Mork, Kevin Schrage, Vladimir Kladnitsky, Richard Osendorf, Bradley Kuempel, Thomas Lundgren, Jordan Flagstad
  • Gas-fired water heater
    Patent number: 5201807
    Abstract: A gas-fired booster water heater for providing water at the sanitizing temperature to a commercial dishwashing machine includes an outer housing which is sized to be installed below a counter and contains a burner comprising a burner box and combustion chamber separated by an infrared burner combustion surface facing into the combustion chamber. A heat exchanger includes finned tubes disposed in the combustion chamber for continuous circulation therethrough of water to be heated during heater operation. The heater housing includes an access opening through which the burner box together with the combustion surface may be disconnected from the combustion chamber and withdrawn as a unit for service or repair without removal of the heater from its installed position below the counter.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: April 13, 1993
    Assignee: Gas Research Institute
    Inventors: Gary W. Liljenberg, Richard K. Nelson, John E. Schmidt, Sr.