US4373452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wood burning stove
Assignee: Corning Glass Works
•
Filing: 1982-03-01
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Granted: 1983-02-15
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Expires: 2002-03-01
Abstract
Abstract Disclosed herein is an improved wood burning stove having a combustion chamber and a flue for removing exhaust from the chamber wherein the improvement comprises the addition of a catalytic converter means for oxidizing oxidizable species in the exhaust. In one embodiment, the catalytic converter means is situated in a flue immediately adjacent the combustion chamber. In another embodiment, the catalytic converter means is situated in the combustion chamber itself. In addition, the nature and structure of a catalytic converter means have been determined for marginal acceptable and optimum performance with adequate pressure drop thereacross.
Inventors
- 👤 Robert V. Van Dewoestine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/06; F23G7/07; F23B; F23B5/00; F24; F24B; F24B1/00; F24B1/006; F24B13/00; F24B13/004; F24B5/00; F24B5/02; F24B5/021; F24B5/026
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
100 words
In a woodburning stove of the type having: a combustion chamber, and a flue for removing exhaust from said chamber, the improvement comprising: a catalytic converter means for oxidizing oxidizable species in said exhaust, said catalytic converter means comprising a honeycomb structure having a plurality of mutually parallel catalytic cells, each having a flow length oriented in the direction of the flow of said exhaust, and a volume (V) in cubic inches expressed as a function of the cell density (N) of said cells in cells per square inch in a direction perpendicular to said flow being at least: ##EQU9##
Claim 2
Dependent Claim
100 words
In a woodburning stove of the type having: a combustion chamber, and a flue for removing exhaust from said chamber, the improvement comprising: a catalytic converter means for oxidizing oxidizable species in said exhaust, said catalytic converter means comprising a honeycomb structure having a plurality of mutually parallel catalytic cells, each having a flow length oriented in the direction of the flow of said exhaust, and a volume (V) in cubic inches expressed as a function of the cell density (N) of said cells in cells per square inch in a direction perpendicular to said flow being at least: ##EQU9##
Claim 3
Dependent Claim
19 words
The stove of claim 1 wherein said catalytic converter means is situated in said flue immediately adjacent said chamber.
Claim 4
Dependent Claim
32 words
The stove of claim 1 wherein said flue communicates with said combustion chamber at an exit port and wherein said catalytic converter means is situated in said chamber at said exit port.
Claim 5
Dependent Claim
15 words
The stove of claim 1 wherein said catalytic converter is situated in said combustion chamber.
Claim 6
Dependent Claim
35 words
The stove of claim 1 further comprising: a heat exchange chamber in communication with said flue, and an opening interconnecting said combustion and heat exchange chambers, said catalytic converter means being situated adjacent said opening.
Claim 7
Dependent Claim
11 words
The stove of claim 1 wherein said oxidizable species is creosote.
Claim 8
Dependent Claim
15 words
The stove of claim 1 wherein said volume in cubic inches is at least: ##EQU10##
Claim 9
Dependent Claim
15 words
The stove of claim 1 wherein said volume in cubic inches is at least: ##EQU11##
Claim 10
Dependent Claim
15 words
The stove of claim 1 wherein said volume in cubic inches is at least: ##EQU12##
Claim 11
Dependent Claim
16 words
The stove of claim 1 wherein the cell density is substantially less than 200 cells/square inch.
Claim 12
Dependent Claim
18 words
The stove of claim 1 wherein the cell density is in the range of about 9-100 cells/square inch.
Claim 13
Dependent Claim
18 words
The stove of claim 1 wherein the cell density is in the range of about 9-50 cells/square inch.
Claim 14
Dependent Claim
17 words
The stove of claim 1 wherein the cell density is in the range of 9-25 cells/square inch.
Claim 15
Dependent Claim
47 words
The stoves of claim 1, 7, 8 or 9 wherein the square of the length of said cells divided by the product of the cell density times the converter volume times the fourth power of the insides dimension of one of said cells is less than 5.
Claim 16
Dependent Claim
47 words
The stoves of claim 1, 7, 8 or 9 wherein the square of the length of said cells divided by the product of the cell density times the converter volume times the fourth power of the inside dimension of one of said cells is less than 7.
Claim 17
Dependent Claim
47 words
The stoves of claim 1, 7, 8 or 9 wherein the square of the length of said cells divided by the product of the cell density times the converter volume times the fourth power of the inside dimension of one of said cells is less than 10.
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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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |