Patents by Inventor Frederick D. Ewing

Frederick D. Ewing 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).

  • Temperature-regulated liquid animal feeder
    Patent number: 5138980
    Abstract: An animal feeder is provided for delivering temperature-regulated liquid feed to one or more animal feed sites. A refrigerated or heated reservoir stores the liquid feed, and one two or three conduits lead from the reservoir to a feed dish which has a bowl portion and a heat exchange portion. A conduit supplies the bowl through a float valve which maintains the liquid in the bowl at a predetermined level. Conduits also circulate liquid through the heat exchange chamber which serves to cool or heat the solid and/or liquid feed in the bowl.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: August 18, 1992
    Inventor: Frederick D. Ewing