Patents by Inventor David L. Varnell

David L. Varnell 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).

  • Patent number: 6016818
    Abstract: A recirculating parts washer is disclosed that features a vertically mounted base and a sink and lid rotatably connected to the base. The recirculating parts washer features a cleaning fluid supply container which is separate from the sink but connected to it via a supply line and a drain line.Cleaning fluid is circulated to the sink via the supply line by means of a submersible pump submerged within the cleaning fluid inside the cleaning fluid supply container. Cleaning fluid returns to the supply container via the drain line, thus enabling the cleaning fluid to be reused over and over again until it is exhausted.By having the sink and lid rotatably mounted to the base of the recirculating parts washer, the bulk of the assembly can be conveniently pivoted upwards and back against the wall when not in use. The recirculating parts washer also features a direct current power supply assembly.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: January 25, 2000
    Assignee: NCH Corporation
    Inventors: Jose E. Evaro, Dale V. Kiplinger, David L. Varnell, Don A. York