US4285327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Firebox refractory floor
Assignee: BUCK STOVE Corp A CORP OF
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Filing: 1979-01-04
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Granted: 1981-08-25
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Expires: 1999-01-04
Abstract
Abstract A refractory floor for the firebox of a heating unit including front, side and rear vertical portions with top surfaces inclined towards the respective wall. The rear and side vertical portions exceed the height of a grate or andirons positioned on the refractory floor.
Inventors
- 👤 Carrol E. Buckner
- 👤 C. Glenn Cook
- 👤 Thomas J. Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:42
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/195; F24B13/00; F24B13/02; F24B7/00; F24B7/02; F24B7/025
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
A refractory base for the interior of a firebox of a heating unit comprising: a horizontal portion for covering the floor of said firebox; a rear vertical portion adapted to be positioned along the rear of said horizontal portion and having a height substantially less than the height of said firebox with an upper surface inclined downwardly toward the center of said horizontal portion; and a pair of side vertical portions adapted to be positioned along the sides of said horizontal portion and each of said side vertical portions having a height substantially less than the height of said firebox with an upper surface inclined downwardly toward the center of said horizontal portion whereby said downwardly inclined surfaces on said rear and side vertical portions will prevent collection of burnt materials thereon.
Claim 2
Dependent Claim
132 words
A refractory base for the interior of a firebox of a heating unit comprising: a horizontal portion for covering the floor of said firebox; a rear vertical portion adapted to be positioned along the rear of said horizontal portion and having a height substantially less than the height of said firebox with an upper surface inclined downwardly toward the center of said horizontal portion; and a pair of side vertical portions adapted to be positioned along the sides of said horizontal portion and each of said side vertical portions having a height substantially less than the height of said firebox with an upper surface inclined downwardly toward the center of said horizontal portion whereby said downwardly inclined surfaces on said rear and side vertical portions will prevent collection of burnt materials thereon.
Claim 3
Dependent Claim
33 words
The refractory base according to claim 1 including a front vertical portion along the front of the horizontal portion inclined up from said horizontal portion away from the center of said horizontal portion.
Claim 4
Dependent Claim
13 words
The refractory base according to claim 2 wherein said refractory base is unitary.
Claim 5
Dependent Claim
27 words
The refractory base according to claim 1 wherein said horizontal and vertical rear and side portions are formed unitary to themselves and formed separate from each other.
Claim 6
Dependent Claim
146 words
In the combination of a heating unit having a firebox with at least a floor and sides and rear walls and refractor means on said floor, the improvement being said refractory means which comprises: a horizontal portion covering said floor; a separate, unitary rear vertical portion extending above said horizontal portion along the rear wall of the firebox of a height substantially less than the height of said rear wall and terminating in a top surface upwardly inclined toward said rear wall; and a pair of separate, unitary side vertical portions extending above said horizontal portion along the side walls of the firebox of a height substantially less than the height of said side walls and terminating in a top surface upwardly inclined toward the adjacent side wall whereby the inclined surfaces on said rear and side vertical portions will prevent collection of burnt materials thereon.
Claim 7
Dependent Claim
146 words
In the combination of a heating unit having a firebox with at least a floor and sides and rear walls and refractor means on said floor, the improvement being said refractory means which comprises: a horizontal portion covering said floor; a separate, unitary rear vertical portion extending above said horizontal portion along the rear wall of the firebox of a height substantially less than the height of said rear wall and terminating in a top surface upwardly inclined toward said rear wall; and a pair of separate, unitary side vertical portions extending above said horizontal portion along the side walls of the firebox of a height substantially less than the height of said side walls and terminating in a top surface upwardly inclined toward the adjacent side wall whereby the inclined surfaces on said rear and side vertical portions will prevent collection of burnt materials thereon.
Claim 8
Dependent Claim
27 words
The combination according to claim 5 wherein said horizontal portion is trapezoidal and said side vertical portions mate with said rear vertical portion at a mitered edge.
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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |