Patent US4230093A successfully refreshed from Google Patents.
US4230093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace door
Assignee: BUCK STOVE Corp A CORP OF
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Filing: 1977-08-26
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Granted: 1980-10-28
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Expires: 1997-08-26
Abstract
Abstract A free-standing unit for heating air in a U-shaped channel surrounding a fire box having a pair of spaced vertical vents for directing the heated forced air to converge in front of the fire box opening to limit air flow towards said openings. Mesh in the vertical vents directs the forced air downward to be combined with the hot forced air from a bottom horizontal vent. A baffle plate depending from the top of the fire-box adjacent the flue port and an opening along the top of the doors ignite the gases adjacent the top and directs some gases back into the fire. By forcing heated air at a low level and drawing cool air from a high level, the air being heated is of a uniform temperature. A hood extending along the top edge of the fire box opening diverts exiting gases back into the fire box. A thermostatically controlled blower creates the forced air and cools the fire box walls.
Inventors
- 👤 Carrol E. Buckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:28
CPC Classifications
F; F24; F24C; F24C1/00; F24C1/14; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1063; Y10T292/1064; Y10T292/1072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
241 words
A heating unit comprising: a firebox; an access opening in the front wall of said firebox; a pair of doors pivotally mounted to said front wall for covering said access opening; a first of said doors having a first handle thereon; a second of said doors having a second handle on the exterior surface of said second door and a latch means on the interior surface of said second door; said latch means including a plate extending beyond the periphery of said second door and of a length sufficient to extend behind an interior portion of said front wall of said firebox, a pair of posts extending from said interior surface of said second door and positioned on opposite sides of said plate to limit movement of said plate between a first vertical position and a second horizontal position, said plate being connected to said second handle for rotation between said pair of posts; each of said doors comprising a main planar portion with a space between said main planar portions when said doors are in a closed position; and a planar vertical strip extending from the exterior surface of said second door and adapted to overlap the exterior surface of said first door main planar portion to retain said first door in closed position when said second door is in closed position whereby movement of said latch means to latched position will retain both of said doors in closed position.
Claim 2
Dependent Claim
241 words
A heating unit comprising: a firebox; an access opening in the front wall of said firebox; a pair of doors pivotally mounted to said front wall for covering said access opening; a first of said doors having a first handle thereon; a second of said doors having a second handle on the exterior surface of said second door and a latch means on the interior surface of said second door; said latch means including a plate extending beyond the periphery of said second door and of a length sufficient to extend behind an interior portion of said front wall of said firebox, a pair of posts extending from said interior surface of said second door and positioned on opposite sides of said plate to limit movement of said plate between a first vertical position and a second horizontal position, said plate being connected to said second handle for rotation between said pair of posts; each of said doors comprising a main planar portion with a space between said main planar portions when said doors are in a closed position; and a planar vertical strip extending from the exterior surface of said second door and adapted to overlap the exterior surface of said first door main planar portion to retain said first door in closed position when said second door is in closed position whereby movement of said latch means to latched position will retain both of said doors in closed position.
References Cited (Backward Citations)
US199964A
Cited
US778279A
Cited
US780610A
Cited
US1244649A
Cited
GB106015A
Cited
US1378583A
Cited
US1379537A
Cited
GB307611A
Cited
DE582993C
Cited
US2409822A
Cited
US2742311A
Cited
US3023068A
Cited
US4027649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |