US3601117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterflow fireplace
Assignee: Individual
•
Filing: 1969-08-01
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Granted: 1971-08-24
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Expires: 1989-08-01
Abstract
Abstract The double-walled fireplace is described which is adapted to be connected to a counterflow chimney arrangement designed to introduce cold air into the fireplace through an outer duct while the heated air is drawn out through an inner duct and discharged to the atmosphere simultaneously with flue gases from the firebox. At the point of attachment of the chimney to the firebox, a diaphragm or baffle assembly is provided which directs the cold air down the sides of the firebox. By providing suitable baffling on one side of the front and the opposite side at the rear, the air flowing down one side can be made to pass up the firebox, and the cold air from the other side can be made to pass up the rear wall of the firebox. In order to accommodate different fireplace configurations it is possible to modify the baffle structure so that different flow patterns will occur.
Inventors
- 👤 Walter C Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:50
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A fireplace assembly comprising a firebox, a chimney means including a first duct for conducting cold air into said fireplace assembly and a second duct for exhausting heated air from said fireplace assembly, means for placing said firebox in communication with said chimney means, a single-walled housing means completely surrounding said firebox and said means for placing said firebox into communication with said chimney and spaced therefrom defining passageways therebetween, first baffle means for directing cold air from said first duct down a first pair of opposed sides of said firebox, second baffle means for directing heated air from a second pair of opposed sides of said firebox upwardly through said second duct, and third baffle means directing said air from each of said first pair opposed sides to each of said second pair of opposed sides.
Claim 2
Dependent Claim
137 words
A fireplace assembly comprising a firebox, a chimney means including a first duct for conducting cold air into said fireplace assembly and a second duct for exhausting heated air from said fireplace assembly, means for placing said firebox in communication with said chimney means, a single-walled housing means completely surrounding said firebox and said means for placing said firebox into communication with said chimney and spaced therefrom defining passageways therebetween, first baffle means for directing cold air from said first duct down a first pair of opposed sides of said firebox, second baffle means for directing heated air from a second pair of opposed sides of said firebox upwardly through said second duct, and third baffle means directing said air from each of said first pair opposed sides to each of said second pair of opposed sides.
Claim 3
Dependent Claim
53 words
The fireplace assembly defined in claim 1 wherein said third baffle means directs air from one of said first pair of opposed sides to one of said second pair of opposed sides and from the other of said first pair of opposed sides to the other of said second pair of opposed sides.
Claim 4
Dependent Claim
39 words
The fireplace assembly defined in claim 1 wherein said first pair of opposed sides are the front and back sides of said fireplace and said second pair of opposed sides are the right and left sides of said fireplace.
Claim 5
Dependent Claim
39 words
The fireplace assembly defined in claim 1 wherein said first pair of opposed sides are the right and left sides of the fireplace and said second pair of opposed side are the front and back sides of said fireplace.
Claim 6
Dependent Claim
40 words
The fireplace assembly defined in claim 2 wherein said said first pair of opposed sides are the front and back sides of said fireplace and said second pair of opposed sides are the right and left sides of said fireplace.
Claim 7
Dependent Claim
38 words
The fireplace assembly defined in claim 2 wherein said first pair of opposed sides are the right and left sides of said fireplace and said second pair of sides are the front and back sides of said fireplace.
Claim 8
Dependent Claim
291 words
A fireplace assembly adapted to cooperate with a chimney means having a flue, a first annular duct for conducting cold air into said fireplace assembly and a second annular duct coaxial with said first annular duct for exhausting heated air from said fireplace assembly, said fireplace assembly comprising a firebox having a lateral opening in the front portion thereof to receive combustibles and comprising a base member supported on legs, opposed vertical sidewalls extending upwardly from the sides of said base member and rear vertical wall extending upwardly from the rear of said base member, a dome assembly communicating said firebox with said flue, said dome assembly comprising an opposed pair of sidewalls inclined downwardly and outwardly from said first annular duct to the sidewalls of said firebox, a rear wall inclined downwardly and rearwardly from said second annular duct to said rear wall of firebox, and a front wall inclined downwardly and forwardly from said second annular duct to said lateral opening, a single wall housing means completely surrounding said firebox and said dome assembly and spaced therefrom in such a manner that passageways are defined therebetween downwardly from said first annular duct across said sidewalls of said dome assembly, upwardly from said reAr wall of said firebox across said rear wall of said dome assembly, into said second annular duct, upwardly from the front portion of said firebox across said front wall of said dome assembly into said second annular duct, and beneath said firebox, and first baffle means for directing a portion of the air flowing down said sidewalls of said dome assembly to the front portion of said firebox and second baffle means for directing airflow from beneath said firebox to said rear wall of said firebox.
Claim 9
Dependent Claim
291 words
A fireplace assembly adapted to cooperate with a chimney means having a flue, a first annular duct for conducting cold air into said fireplace assembly and a second annular duct coaxial with said first annular duct for exhausting heated air from said fireplace assembly, said fireplace assembly comprising a firebox having a lateral opening in the front portion thereof to receive combustibles and comprising a base member supported on legs, opposed vertical sidewalls extending upwardly from the sides of said base member and rear vertical wall extending upwardly from the rear of said base member, a dome assembly communicating said firebox with said flue, said dome assembly comprising an opposed pair of sidewalls inclined downwardly and outwardly from said first annular duct to the sidewalls of said firebox, a rear wall inclined downwardly and rearwardly from said second annular duct to said rear wall of firebox, and a front wall inclined downwardly and forwardly from said second annular duct to said lateral opening, a single wall housing means completely surrounding said firebox and said dome assembly and spaced therefrom in such a manner that passageways are defined therebetween downwardly from said first annular duct across said sidewalls of said dome assembly, upwardly from said reAr wall of said firebox across said rear wall of said dome assembly, into said second annular duct, upwardly from the front portion of said firebox across said front wall of said dome assembly into said second annular duct, and beneath said firebox, and first baffle means for directing a portion of the air flowing down said sidewalls of said dome assembly to the front portion of said firebox and second baffle means for directing airflow from beneath said firebox to said rear wall of said firebox.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |