Patent US4464253A successfully refreshed from Google Patents.
Patent US4947769A successfully refreshed from Google Patents.
US4947769A
Expired / Lapsed
US
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Apparatus for combustion of solid particulate fuel
Assignee: HEARTH TRENDS Inc
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Filing: 1989-06-27
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Granted: 1990-08-14
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Expires: 2009-06-27
Abstract
Abstract An apparatus for burning solid particulate fuels in a top-fed combustion system that permits the use of fuels that produce large amounts of ash and clinkers. The apparatus displaces the ash and clinkers from the grate which, if not removed, would adversely affect the heat output and efficiency of combustion. The apparatus uses a rotating reciprocating member that removes the ash and clinkers from the grate that supports the solid particulate fuel during combustion.
Inventors
- 👤 Oliver J. Whitfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:49
CPC Classifications
F; F23; F23M; F23M9/00; F23M9/06; F23B; F23B1/00; F23B1/16; F23B30/00; F23B40/00; F23B40/06; F23B50/00; F23B50/12; F23G; F23G5/00; F23G5/24; F23G5/28; F23G7/00; F23G7/10; F23G7/105; F23L; F23L1/00; F23L1/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
112 words
An apparatus for the combustion of solid particulate fuel comprising: a stationary grate including a perforated plate for receiving said solid particulate fuel; displaceable means positioned in a plane above said grate, movement of said displaceable means displacing spent solid particulate fuel from said stationary grate, said displaceable means including a rotatable member; and a burning cap positioned over said stationary grate, said burning cap defining a combustion chamber above said stationary grate, said burning cap including a baffle that divides said combustion chamber into a primary half and a secondary half, said burning cap also including an aperture for allowing said solid particulate fuel to be introduced into said primary half.
Claim 2
Independent Claim
112 words
An apparatus for the combustion of solid particulate fuel comprising: a stationary grate including a perforated plate for receiving said solid particulate fuel; displaceable means positioned in a plane above said grate, movement of said displaceable means displacing spent solid particulate fuel from said stationary grate, said displaceable means including a rotatable member; and a burning cap positioned over said stationary grate, said burning cap defining a combustion chamber above said stationary grate, said burning cap including a baffle that divides said combustion chamber into a primary half and a secondary half, said burning cap also including an aperture for allowing said solid particulate fuel to be introduced into said primary half.
Claim 3
Dependent Claim
24 words
The apparatus of claim 1, wherein movement of said displaceable means deters the formation of solid clinkers upon combustion of said solid particulate fuel.
Claim 4
Dependent Claim
58 words
The apparatus of claim 1, further comprising: means for introducing combustion gas below said stationary grate such that said combustion gas may pass through said stationary grate into said primary half and said secondary half of said combustion chamber, said baffle including an orifice for allowing combustion gas in said secondary half to pass into said primary half.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3, wherein said baffle maintains substantially all of said solid particulate fuel within said primary half of said combustion chamber.
Claim 6
Dependent Claim
20 words
The apparatus of claim 1, further comprising a solid particulate fuel inlet positioned in a plane above said stationary grate.
Claim 7
Dependent Claim
21 words
The apparatus of claim 1, wherein said spent solid particulate fuel is selected from the group consisting of ash and clinkers.
Claim 8
Dependent Claim
27 words
The apparatus of claim 6, wherein said solid particulate fuel is selected from the group consisting of pelletized wood, waste, agricultural residue, paper, coal dust, and garbage.
Claim 9
Dependent Claim
31 words
The apparatus of claim 1, further comprising an opening between said burning cap and said stationary grate, said spent solid particulate fuel being displaced from said stationary grate through said opening.
Claim 10
Dependent Claim
49 words
The apparatus of claim 1, further comprising an opening between said burning cap and the portion of said stationary grate within said primary half of said combustion chamber, said spent solid particulate fuel being displaced from said stationary grate through said opening by said displacement of said rotatable member.
Claim 11
Independent Claim
112 words
An apparatus for the combustion of solid particulate fuel comprising: a stationary grate including a perforated plate for receiving said solid particulate fuel; displaceable means positioned in a plane above said grate, movement of said displaceable means displacing spent solid particulate fuel from said stationary grate, said displaceable means including a reciprocating member; and a burning cap positioned over said stationary grate, said burning cap defining a combustion chamber above said stationary grate, said burning cap including a baffle that divides said combustion chamber into a primary half and a secondary half, said burning cap also including an aperture for allowing said solid particulate fuel to be introduced into said primary half.
Claim 12
Independent Claim
112 words
An apparatus for the combustion of solid particulate fuel comprising: a stationary grate including a perforated plate for receiving said solid particulate fuel; displaceable means positioned in a plane above said grate, movement of said displaceable means displacing spent solid particulate fuel from said stationary grate, said displaceable means including a reciprocating member; and a burning cap positioned over said stationary grate, said burning cap defining a combustion chamber above said stationary grate, said burning cap including a baffle that divides said combustion chamber into a primary half and a secondary half, said burning cap also including an aperture for allowing said solid particulate fuel to be introduced into said primary half.
Claim 13
Dependent Claim
58 words
The apparatus of claim 10, further comprising: means for introducing combustion gas below said stationary grate such that said combustion gas may pass through said stationary grate into said primary half and said secondary half of said combustion chamber, said baffle including an orifice for allowing combustion gas in said secondary half to pass into said primary half.
Claim 14
Dependent Claim
31 words
The apparatus of claim 10, further comprising an opening between said burning cap and said stationary grate, said spent solid particulate fuel being displaced from said stationary grate through said opening.
Claim 15
Dependent Claim
35 words
The apparatus of claim 10, wherein said spent solid particulate fuel is displaced from the portion of said stationary grate within said secondary half of said combustion chamber by said displacement of said reciprocating member.
Claim 16
Dependent Claim
24 words
The apparatus of claim 10, wherein movement of said displaceable means deters the formation of solid clinkers upon combustion of said solid particulate fuel.
Claim 17
Dependent Claim
24 words
The apparatus of claim 11, wherein said baffle maintains substantially all of said solid particulate fuel within said primary half of said combustion chamber.
Claim 18
Dependent Claim
20 words
The apparatus of claim 10, further comprising a solid particulate fuel inlet position in the plane above said stationary grate.
Claim 19
Dependent Claim
21 words
The apparatus of claim 10, wherein said spent solid particulate fuel is selected from the group consisting of ash and clinkers.
Claim 20
Dependent Claim
27 words
The apparatus of claim 17, wherein said solid particulate fuel is selected from the group consisting of pelletized wood, waste, agricultural residue, paper, coal dust, and garbage.
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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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |