US3794014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air furnace
Assignee: Lear Siegler Inc
•
Filing: 1971-11-26
•
Granted: 1974-02-26
•
Expires: 1991-11-26
Abstract
Abstract A hot-air furnace comprising a cylindrical combustion chamber with a plurality of apertures in the lower end of the combustion chamber wall through which flame jets are radially discharged into a flue chamber having a plurality of radiating vertical fins. An air chamber wall with a plurality of radiating vertical fins disposed therein surrounds the flue chamber. A novel blower means is in communication with one end of the air chamber.
Inventors
- 👤 D Mcvickar
- 👤 A Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:51
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065; F24H9/00; F24H9/0052
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
195 words
A hot-air furnace comprising: a combustion chamber having closed ends and a combustion chamber wall, and a plurality of apertures in the lower end of said wall; a flue chamber wall surrounding said combustion chamber wall and forming a flue chamber therebetween located immediately adjacent to said combustion chamber, the bottom of said flue chamber being closed, said combustion chamber wall forming the only wall between said combustion and flue chambers whereby the apertures in said combustion chamber wall permit jets of flame to shoot out of said combustion chamber into said flue chamber; a flue pipe on top of said flue chamber and in communication therewith; a plurality of radiating vertical fins disposed in said flue chamber; an air chamber wall surrounding and immediately adjacent said flue chamber wall and forming an air chamber therebetween; a plurality of radiating vertical fins disposed in said air chamber; a blower means in communication with one end of said air chamber; and a burner means adjacent said air chamber wall, the burner nozzle of said burner being in communication with said combustion chamber through said air chamber wall, said flue chamber wall and said combustion chamber wall.
Claim 2
Dependent Claim
195 words
A hot-air furnace comprising: a combustion chamber having closed ends and a combustion chamber wall, and a plurality of apertures in the lower end of said wall; a flue chamber wall surrounding said combustion chamber wall and forming a flue chamber therebetween located immediately adjacent to said combustion chamber, the bottom of said flue chamber being closed, said combustion chamber wall forming the only wall between said combustion and flue chambers whereby the apertures in said combustion chamber wall permit jets of flame to shoot out of said combustion chamber into said flue chamber; a flue pipe on top of said flue chamber and in communication therewith; a plurality of radiating vertical fins disposed in said flue chamber; an air chamber wall surrounding and immediately adjacent said flue chamber wall and forming an air chamber therebetween; a plurality of radiating vertical fins disposed in said air chamber; a blower means in communication with one end of said air chamber; and a burner means adjacent said air chamber wall, the burner nozzle of said burner being in communication with said combustion chamber through said air chamber wall, said flue chamber wall and said combustion chamber wall.
Claim 3
Dependent Claim
48 words
A hot-air furnace according to claim 1 wherein said fins in said flue chamber extend from the top of said flue chamber to a position short of the bottom of aid flue chamber and a majority of said apertures in said combustion chamber wall are below said position.
Claim 4
Dependent Claim
24 words
A hot-air furnace according to claim 1 wherein said combustion chamber wall, said flue chamber wall, and said air chamber wall are all annular.
Claim 5
Dependent Claim
20 words
A hot-air furnace according to claim 1 wherein said blower means is mounted on one end of said air chamber.
Claim 6
Dependent Claim
20 words
A hot-air furnace according to claim 4 wherein said blower means is mounted on the top of said air chamber.
Claim 7
Dependent Claim
213 words
A hot-air furnace comprising: a combustion chamber having closed ends and a combustion chamber wall, and a plurality of apertures in the lower end of said wall; a flue chamber wall surrounding said combustion chamber wall and forming a flue chamber therebetween located immediately adjacent to said combustion chamber, the bottom of said flue chamber being closed; a flue pipe on top of said flue chamber and in communication therewith; a plurality of radiating vertical fins disposed in said flue chamber, said fins including fins which extend radially a substantial distance between said flue chamber wall and said air chamber wall and longitudinally from the top of said flue chamber to a position short of the bottom of said flue chamber, and a majority of said apertures in said combustion chamber wall being below said position; an air chamber wall surrounding and immediately adjacent said flue chamber wall and forming an air chamber therebetween; a plurality of radiating vertical fins disposed in said air chamber; a blower means in communication with one end of said air chamber; and a burner means adjacent said air chamber wall, the burner nozzle of said burner being in communication with said combustion chamber through said air chamber wall, said flue chamber wall and said combustion chamber wall.
Claim 8
Dependent Claim
213 words
A hot-air furnace comprising: a combustion chamber having closed ends and a combustion chamber wall, and a plurality of apertures in the lower end of said wall; a flue chamber wall surrounding said combustion chamber wall and forming a flue chamber therebetween located immediately adjacent to said combustion chamber, the bottom of said flue chamber being closed; a flue pipe on top of said flue chamber and in communication therewith; a plurality of radiating vertical fins disposed in said flue chamber, said fins including fins which extend radially a substantial distance between said flue chamber wall and said air chamber wall and longitudinally from the top of said flue chamber to a position short of the bottom of said flue chamber, and a majority of said apertures in said combustion chamber wall being below said position; an air chamber wall surrounding and immediately adjacent said flue chamber wall and forming an air chamber therebetween; a plurality of radiating vertical fins disposed in said air chamber; a blower means in communication with one end of said air chamber; and a burner means adjacent said air chamber wall, the burner nozzle of said burner being in communication with said combustion chamber through said air chamber wall, said flue chamber wall and said combustion chamber wall.
Claim 9
Dependent Claim
65 words
A hot-air furnace according to claim 6 wherein said apertures are of small size and are located substantially around the entire circumference of the lower end of said combustion chamber wall whereby jets of flame are permitted to shoot out of said combustion chamber into said flue chamber via said apertures to uniformly supplement the heat transfer between said combustion chamber and said flue chamber.
Claim 10
Dependent Claim
209 words
A hot-air furnace comprising: a combustion chamber having closed ends and a combustion chamber wall, and a plurality of apertures in the lower end of said wall; a flue chamber wall surrounding said combustion chamber wall and forming a flue chamber therebetween, the bottom of said flue chamber being closed; a flue pipe on top of said flue chamber and in communication therewith; a plurality of radiating vertical fins disposed in said flue chamber; an air chamber wall surrounding said flue chamber wall and forming an air chamber therebetween; a plurality of radiating vertical fins disposed in said air chamber; a blower means in communication with one end of said air chamber; and a burner means adjacent said air chamber wall, the burner nozzle of said burner being in communication with said combustion chamber through said air chamber wall, said flue chamber wall and said combustion Chamber wall; said apertures in said combustion chamber wall being of small size and located substantially around the entire circumference of the lower end of said combustion chamber wall whereby jets of flame are permitted to shoot out of said combustion chamber into said flue chamber via said apertures to uniformly supplement the heat transfer between said combustion chamber and said flue chamber.
Claim 11
Dependent Claim
209 words
A hot-air furnace comprising: a combustion chamber having closed ends and a combustion chamber wall, and a plurality of apertures in the lower end of said wall; a flue chamber wall surrounding said combustion chamber wall and forming a flue chamber therebetween, the bottom of said flue chamber being closed; a flue pipe on top of said flue chamber and in communication therewith; a plurality of radiating vertical fins disposed in said flue chamber; an air chamber wall surrounding said flue chamber wall and forming an air chamber therebetween; a plurality of radiating vertical fins disposed in said air chamber; a blower means in communication with one end of said air chamber; and a burner means adjacent said air chamber wall, the burner nozzle of said burner being in communication with said combustion chamber through said air chamber wall, said flue chamber wall and said combustion Chamber wall; said apertures in said combustion chamber wall being of small size and located substantially around the entire circumference of the lower end of said combustion chamber wall whereby jets of flame are permitted to shoot out of said combustion chamber into said flue chamber via said apertures to uniformly supplement the heat transfer between said combustion chamber and said flue chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |