US4173966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained heating apparatus
Assignee: Individual
•
Filing: 1977-05-16
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Granted: 1979-11-13
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Expires: 1997-05-16
Abstract
Abstract A self-contained heating apparatus adapted for mounting in a fireplace includes an air chamber surrounding a combustion chamber. An air mover is provided for circulating air through the air chamber and outwardly from air ducts which extend across the combustion chamber.
Inventors
- 👤 Richard O. Scharen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:03
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885; F24B1/1886
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
142 words
A self-contained heating apparatus comprising: a combustion chamber having spaced-apart and vertically staggered upper and lower front walls, side and rear walls and top and bottom walls, a flue extending upwardly from an opening in said top wall, an air chamber including outer side walls and an outer rear wall surrounding and spaced from said side and rear walls respectively, multiple air ducts disposed between said flue and said bottom wall which extend from openings in said rear wall to corresponding aligned openings in said upper front wall, said air ducts being in communication with said air chamber, a substantially horizontally arranged heating surface disposed forwardly of and beneath the discharge openings of said air ducts, and air mover means operable for circulating air through said air chamber for discharging the air through said air ducts outwardly from said upper front wall.
Claim 2
Dependent Claim
142 words
A self-contained heating apparatus comprising: a combustion chamber having spaced-apart and vertically staggered upper and lower front walls, side and rear walls and top and bottom walls, a flue extending upwardly from an opening in said top wall, an air chamber including outer side walls and an outer rear wall surrounding and spaced from said side and rear walls respectively, multiple air ducts disposed between said flue and said bottom wall which extend from openings in said rear wall to corresponding aligned openings in said upper front wall, said air ducts being in communication with said air chamber, a substantially horizontally arranged heating surface disposed forwardly of and beneath the discharge openings of said air ducts, and air mover means operable for circulating air through said air chamber for discharging the air through said air ducts outwardly from said upper front wall.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein said air mover means is mounted on a rear portion of said outer wall.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |