US 12,474,045 B2
Burn control apparatus for solid fuel
William Eugene Rabbitt, Chesterland, OH (US); and Robert F. Soreo, Cleveland Heights, OH (US)
Assigned to Zippo Manufacturing Company, Bradford, PA (US)
Filed by Zippo Manufacturing Company, Bradford, PA (US)
Filed on Nov. 22, 2022, as Appl. No. 17/992,210.
Prior Publication US 2024/0167677 A1, May 23, 2024
Int. Cl. F23B 50/00 (2006.01)
CPC F23B 1/36 (2013.01) [F23B 2700/037 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An apparatus in which a solid fuel mass is burned, the apparatus comprising:
a base cup configured to receive a lower portion of the solid fuel mass; and
a descent cup configured to receive an upper portion of the solid fuel mass, the descent cup including a flame orifice;
wherein the descent cup is telescopically associated with the base cup and moves toward the base cup as the solid fuel mass is burned;
wherein a flame produced as the solid fuel mass is burned extends outwardly from the flame orifice of the descent cup; and
wherein the base cup has an external cylindrical shape defined by an outer diameter, and the descent cup has an internal cylindrical shape defined by an inner diameter greater than the outer diameter of the base cup.