US4279629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire prevention filter for chimneys and the like
Assignee: Metal Fab Inc
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Filing: 1980-02-14
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Granted: 1981-07-21
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Expires: 2000-02-14
Abstract
Abstract This invention is concerned with a removable filter to prevent the buildup of Creosote in chimneys which become vulnerable to fires. A hollow enclosure means that is adapted to connect between the chimney and the fire source has within it a support for mounting a filter. The filter is made of a special metal, is knitted with small openings therein permitting the flow of smoke but at the same time to reduce the particles into a minute white ash. The filter acts as a continuous burn reactor. A door is provided whereby the filter can be easily removed from the hollow enclosure and cleaned so that it can be used for an indefinite period without replacement.
Inventors
- 👤 Donald S. Simms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:09
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/0002; B01D46/0012; B01D46/10; F; F23; F23J; F23J15/00; F23J15/02; F23J15/022; F23J15/025; F23L; F23L13/00; F23L13/02; F23J2213/00; F23J2213/60; F23J2217/00; F23J2217/30; Y; Y10; Y10S; Y10S55/00; Y10S55/20; Y10S55/43
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
125 words
An assembly for eliminating the buildup of creosote in chimneys comprising a hollow enclosure means having means at its top and bottom so as to be adapted to be connected between a stove pipe and a chimney, a door means located in said hollow enclosure, a damper plate adjacent said door means having a plurality of legs extending downwardly therefrom, a filter having a plurality of openings therein and being supported by said legs, an opening in the middle area of said damper plate, lift pads mounted on said damper plate to space said filter from said damper plate, said openings in said filter being aligned with the opening in said damper plate, and means for rotating said damper plate within said hollow enclosure means.
Claim 2
Dependent Claim
125 words
An assembly for eliminating the buildup of creosote in chimneys comprising a hollow enclosure means having means at its top and bottom so as to be adapted to be connected between a stove pipe and a chimney, a door means located in said hollow enclosure, a damper plate adjacent said door means having a plurality of legs extending downwardly therefrom, a filter having a plurality of openings therein and being supported by said legs, an opening in the middle area of said damper plate, lift pads mounted on said damper plate to space said filter from said damper plate, said openings in said filter being aligned with the opening in said damper plate, and means for rotating said damper plate within said hollow enclosure means.
Claim 3
Dependent Claim
74 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 1 wherein the means for adapting the hollow enclosure means to connect between a stove pipe and a chimney comprises a neck of reduced cross section at both the top and bottom of said hollow enclosure means whereby a pipe whose outside dimension is of the same inner dimension of said enclosure means is able to make friction contact therewith.
Claim 4
Dependent Claim
26 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 2 wherein said filter is made of a stainless steel wire mesh.
Claim 5
Dependent Claim
110 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 3 wherein said door means comprises a flange extending from said hollow enclosure means, an inner seal on the inner periphery of said flange, detent means extending inwardly on said flange away from said periphery, and an outer door having a handle thereupon and being adapted to fit within said inner periphery of said flanges whereby the detent means maintain said door in a fixed and secure position, said flange being located opposite the damper plate and the filter supported thereon whereby the filter may be easily removed from said enclosure means through the door means.
Claim 6
Dependent Claim
85 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 2 wherein said damper plate is mounted on the shank of a bolt with a head, said bolt being secured to said hollow enclosure means through an opening therein and in contact with said downwardly extending legs, a spring means circumscribing said shank of the bolt between its head and the outer surface of said enclosure means whereby the damper plate supporting the filter may be rotated into various fixed positions.
Claim 7
Dependent Claim
110 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 5 wherein said door means comprises a flange extending from said hollow enclosure means, an inner seal on the inner periphery of said flange, detent means extending inwardly on said flange away from said periphery, and an outer door having a handle thereupon and being adapted to fit within said inner periphery of said flanges whereby the detent means maintain said door in a fixed and secure position, said flange being located opposite the damper plate and the filter supported thereon whereby the filter may be easily removed from said enclosure means through the door means.
Claim 8
Dependent Claim
110 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 2 wherein said door means comprises a flange extending from said hollow enclosure means, an inner seal on the inner periphery of said flange, detent means extending inwardly on said flange away from said periphery, and an outer door having a handle thereupon and being adapted to fit within said inner periphery of said flange whereby the detent means maintain said door in a fixed and secure position, said flange being located opposite the damper plate and the filter supported thereon whereby the filter may be easily removed from said enclosure means through the door means.
Claim 9
Dependent Claim
26 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 1 wherein said filter is made of a stainless steel wire mesh.
Claim 10
Dependent Claim
85 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 8 wherein said damper plate is mounted on the shank of a bolt with a head, said bolt being secured to said hollow enclosure means through an opening therein and in contact with said downwardly extending legs, a spring means circumscribing said shank of the bolt between its head and the outer surface of said enclosure means whereby the damper plate supporting the filter may be rotated into various fixed positions.
Claim 11
Dependent Claim
110 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 9 wherein said door means comprises a flange extending from said hollow enclosure means, an inner seal on the inner periphery of said flange, detent means extending inwardly on said flange away from said periphery, and an outer door having a handle thereupon and being adapted to fit within said inner periphery of said flange whereby the detent means maintain said door in a fixed and secure position, said flange being located opposite the damper plate and the filter supported thereon whereby the filter may be easily removed from said enclosure means through the door means.
Claim 12
Dependent Claim
110 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 8 wherein said door means comprises a flange extending from said hollow enclosure means, an inner seal on the inner periphery of said flange, detent means extending inwardly on said flange away from said periphery, and an outer door having a handle thereupon and being adapted to fit within said inner periphery of said flange whereby the detent means maintain said door in a fixed and secure position, said flange being located opposite the damper plate and the filter supported thereon whereby the filter may be easily removed from said enclosure means through the door means.
Claim 13
Dependent Claim
85 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 1 wherein said damper plate is mounted on the shank of a bolt with a head, said bolt being secured to said hollow enclosure means through an opening therein and in contact with said downwardly extending legs, a spring means circumscribing said shank of the bolt between its head and the outer surface of said enclosure means whereby the damper plate supporting the filter may be rotated into various fixed positions.
Claim 14
Dependent Claim
110 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 12 wherein said door means comprises a flange extending from said hollow enclosure means, an inner seal on the inner periphery of said flange, detent means extending inwardly on said flange away from said periphery, and an outer door having a handle thereupon and being adapted to fit within said inner periphery of said flange whereby the detent means maintain said door in a fixed and secure position, said flange being located opposite the damper plate and the filter supported thereon whereby the filter may be easily removed from said enclosure means through the door means.
Claim 15
Dependent Claim
110 words
An assembly for eliminating the buildup of creosote in chimneys as recited in claim 1 wherein said door means comprises a flange extending from said hollow enclosure means, an inner seal on the inner periphery of said flange, detent means extending inwardly on said flange away from said periphery, and an outer door having a handle thereupon and being adapted to fit within said inner periphery of said flange whereby the detent means maintain said door in a fixed and secure position, said flange being located opposite the damper plate and the filter supported thereon whereby the filter may be easily removed from said enclosure means through the door means.
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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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |