Patent Number: 6,167,945

Title: Non-freezing watering dish for animals

Abstract: A non-freezing dish includes a sealed tube having a heating end and an opposite condensation end configured to be inserted into the ground with the heated end below grade. A phase change material having a gas phase and a liquid phase is sealed in the tube. Heat is absorbed from the ground into the liquid phase to generate a heated gas phase that rises to the condensation end. A condenser conducts the heat to a removable dish and condenses the gas to a cooled liquid phase that is returned to the heated end.

Inventors: Bottum, Sr.; Edward W. (Brighton, MI), Bottum, Jr.; Edward W. (Brighton, MI)

Assignee: Refrigeration Research, Inc.

International Classification: A01K 7/00 (20060101); A01K 7/02 (20060101); F28D 15/02 (20060101); A01K 007/00 (); F28D 015/02 ()

Expiration Date: 01/02/2018