Patents by Inventor David Thomas Springer

David Thomas Springer 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).

  • Modular condensate pump assembly
    Patent number: 6322326
    Abstract: The present invention provides an improved, modular condensate pump assembly that has a collection tank which can be disposed at any convenient location to collect liquid condensate. A removable support plate is supported on the collection tank, and a pump extending into the collection tank is supported by the support plate. A liquid volume control float, also supported by the support plate, communicates with the pump to activate the pump to remove liquid condensate from the collection tank when the condensate liquid reaches a predetermined volume.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: November 27, 2001
    Inventors: Lee W. Davis, D. W. Hearn, Jr., David Thomas Springer, James J. Coffey, Jon David Currier
  • Condensate pump
    Patent number: D414500
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: September 28, 1999
    Assignee: Little Giant Pump Company
    Inventors: Lee W. Davis, D. W. Hearn, Jr., David Thomas Springer, James J. Coffey, Jon David Currier