US 11,998,133 B2
Cooking device having a cooking vessel and a ceramic heater
Jerry Wayne Smith, Irvine, KY (US)
Assigned to Lexmark International, Inc., Lexington, KY (US)
Filed by LEXMARK INTERNATIONAL, INC., Lexington, KY (US)
Filed on Apr. 26, 2023, as Appl. No. 18/139,658.
Application 18/139,658 is a continuation of application No. 16/782,327, filed on Feb. 5, 2020, granted, now 11,666,170.
Claims priority of provisional application 62/802,955, filed on Feb. 8, 2019.
Prior Publication US 2023/0255386 A1, Aug. 17, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A47J 36/04 (2006.01); A47J 27/00 (2006.01); A47J 27/02 (2006.01); F24C 15/00 (2006.01); F24C 15/32 (2006.01); F28D 15/02 (2006.01); H05B 3/14 (2006.01); H05B 3/26 (2006.01); F24C 7/06 (2006.01); H05B 1/02 (2006.01); H05B 3/76 (2006.01)
CPC A47J 27/004 (2013.01) [A47J 27/02 (2013.01); A47J 36/04 (2013.01); F24C 15/005 (2013.01); F24C 15/32 (2013.01); F28D 15/0275 (2013.01); H05B 3/141 (2013.01); H05B 3/265 (2013.01); A47J 2202/00 (2013.01); F24C 7/067 (2013.01); H05B 1/0202 (2013.01); H05B 3/76 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A cooking vessel, comprising:
a food receptacle for holding food during cooking;
an inner shell and an outer shell, an outside surface of the inner shell forms the food receptacle, a portion of an inside surface of the inner shell is spaced from a portion of an inside surface of the outer shell forming a sealed volume between the inner shell and the outer shell; and
a heat pipe positioned within the sealed volume between the inner shell and the outer shell for distributing heat through the sealed volume between the inner shell and the outer shell, wherein the heat pipe includes a working fluid configured to change from a liquid state to a vapor state upon absorbing heat within an evaporation zone positioned within the sealed volume between the inner shell and the outer shell and to release heat upon changing from the vapor state to the liquid state within a condensation zone positioned within the sealed volume between the inner shell and the outer shell.