US3688709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow grate incinerator
Assignee: ANTI POLLUTION INCINERATORS
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Filing: 1970-11-03
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Granted: 1972-09-05
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Expires: 1990-11-03
Abstract
Abstract A furnace structure incorporating a hollow grate wherein incoming combustion air is circulated around the combustion chamber and through the hollow grate.
Inventors
- 👤 Raymond A Sheffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:31
CPC Classifications
F; F23; F23G; F23G5/00; F23G5/08; F23G5/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A furnace structure comprising: a. a combustion chamber having a plurality of outer walls, a hollow grate, a base with said hollow grate therein, side walls extending inwardly from said base at an acute angle defining a triangular chamber with an air inlet at the top thereof and said hollow grate comprising a plurality of metal tubes; b. means for circulating air around said outer walls and through said hollow grate; and c. means for sustaining combustion in said combustion chamber.
Claim 2
Dependent Claim
81 words
A furnace structure comprising: a. a combustion chamber having a plurality of outer walls, a hollow grate, a base with said hollow grate therein, side walls extending inwardly from said base at an acute angle defining a triangular chamber with an air inlet at the top thereof and said hollow grate comprising a plurality of metal tubes; b. means for circulating air around said outer walls and through said hollow grate; and c. means for sustaining combustion in said combustion chamber.
Claim 3
Dependent Claim
38 words
The furnace of claim 1, wherein said means for circulating air includes an air passage around said combustion chamber defined by an outer wall and said hollow grate, and an inlet and an outlet in said outer wall.
Claim 4
Dependent Claim
71 words
The furnace of claim 1, wherein said means for circulating air includes a first air passage around said combustion chamber defined by a first outer wall and said hollow grate, a first inlet and a first outlet in said first outer wall, and a second air passage around said first air passage defined by a second outer wall, and a second inlet and a second outlet in said second outer wall.
Claim 5
Dependent Claim
14 words
The furnace of claim 3, further comprising blowers in said first and second inlets.
Claim 6
Dependent Claim
27 words
The furnace of claim 3, further comprising overhead baffles at the top of said combustion chamber and a vertical baffle at the rear of said combustion chamber.
Claim 7
Dependent Claim
25 words
The furnace of claim 5, further comprising combustion inlet means through the bottom of said vertical baffle and combustion outlet means behind said vertical baffle.
Claim 8
Dependent Claim
27 words
The furnace of claim 6, further comprising flow control means for proportioning the flow of combustion gases through said combustion inlet means and said combustion outlet means.
Claim 9
Dependent Claim
16 words
The furnace of claim 7, further comprising a gas washer connected to said combustion outlet means.
Claim 10
Dependent Claim
17 words
The furnace of claim 8, further comprising means for connecting said gas washer and said first inlet.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |