Patents by Inventor Richard M. Pierce

Richard M. Pierce 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).

  • Cleaning liquid dispensing system for a hard floor surface cleaner
    Patent number: 6735811
    Abstract: A cleaning liquid dispensing system for use in a mobile hard floor surface cleaner includes fluid conduit and fluid communication with a supply of cleaning liquid, a pump, and a flow restriction member. The pump is adapted to drive a flow of the cleaning liquid through the conduit. The flow restriction member generates a pressure drop in the conduit, thereby restricting the flow of the cleaning liquid therethrough.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: May 18, 2004
    Assignee: Tennant Company
    Inventors: Bruce F. Field, Joseph K. Krueger, Bryan Christensen, Richard M. Pierce, James J. Seifert
  • Cleaning liquid dispensing system for a hard floor surface cleaner
    Publication number: 20030019069
    Abstract: A cleaning liquid dispensing system for use in a mobile hard floor surface cleaner includes fluid conduit and fluid communication with a supply of cleaning liquid, a pump, and a flow restriction member. The pump is adapted to drive a flow of the cleaning liquid through the conduit. The flow restriction member generates a pressure drop in the conduit, thereby restricting the flow of the cleaning liquid therethrough.
    Type: Application
    Filed: May 9, 2002
    Publication date: January 30, 2003
    Inventors: Bruce F. Field, Joseph K. Krueger, Bryan Christensen, Richard M. Pierce, James J. Seifert