Furnace Patents (Class D23/329)

Down discharge heating and cooling unit

Patent number: D292228

Type: Grant

Filed: November 28, 1984

Date of Patent: October 6, 1987

Inventor: Leonard A. Framalin
Friction furnace

Patent number: D297045

Type: Grant

Filed: September 16, 1985

Date of Patent: August 2, 1988

Inventor: Louis D. Powell
Friction furnace

Patent number: D300772

Type: Grant

Filed: September 4, 1986

Date of Patent: April 18, 1989

Inventor: Louis D. Powell
Double door unit for a firebox

Patent number: D345203

Type: Grant

Filed: July 2, 1991

Date of Patent: March 15, 1994

Inventor: Leslie Blevins, Jr.
Front and side panels of a firebox with automatic feed hopper

Patent number: D350189

Type: Grant

Filed: April 29, 1992

Date of Patent: August 30, 1994

Inventor: Leslie Blevins, Jr.
Furnace enclosure with double doors unit for a firebox

Patent number: D357063

Type: Grant

Filed: July 2, 1991

Date of Patent: April 4, 1995

Inventor: Leslie Blevins, Jr.
Heat exchanger for fuel fired furnaces

Patent number: D360258

Type: Grant

Filed: December 10, 1993

Date of Patent: July 11, 1995

Assignee: Rheem Manufacturing Company

Inventor: Timothy J. Shellenberger
Assembly of cast refractory segments of an annealing furnace base

Patent number: D371836

Type: Grant

Filed: December 21, 1994

Date of Patent: July 16, 1996

Inventor: Gary L. Coble
Cast refractory corner segment of an annealing furnace base

Patent number: D371837

Type: Grant

Filed: December 21, 1994

Date of Patent: July 16, 1996

Inventor: Gary L. Coble
Assembly of arcuate cast refractory and steel segments of an annealing furnace base

Patent number: D374072

Type: Grant

Filed: December 21, 1994

Date of Patent: September 24, 1996

Inventor: Gary L. Coble
Cast refractory side segment of an annealing furnace base

Patent number: D374073

Type: Grant

Filed: December 21, 1994

Date of Patent: September 24, 1996

Inventor: Gary L. Coble

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