Patent US4901538A successfully refreshed from Google Patents.
Patent US4461273A successfully refreshed from Google Patents.
US4461273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stove
Assignee: KENT HEATING Ltd
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Filing: 1981-06-09
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Granted: 1984-07-24
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Expires: 2001-06-09
Abstract
Abstract A slow combustion stove having a transparent portion to enable vision into a primary combustion zone so that flames are visible in use has a double burning combustion chamber defined by the primary combustion chamber and a partitioned off secondary burning combustion chamber, an air inlet to enable air to circulate within the stove adjacent a deflector which deflects the incoming air over the transparent portion to cool and resist staining and soot build-up thereon. A majority of the air passes to the primary combustion zone and a proportion of further gases enter the secondary combustion chamber with the gases of primary combustion for combustion of smoke and other unburned gases. A by-pass is provided for by-passing the normal combustion flow path when lighting the stove and additionally, an interlock is provided for preventing accidental opening of a door into the stove while the by-pass is closed, said by-pass damper is jamming resistant and acts as a pressure relief valve by virtue of the provision of a damper head to float and rotate relative to its mounting and support.
Inventors
- 👤 Anthony M. Barker
- 👤 Robert N. Lockhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:12
CPC Classifications
F; F24; F24B; F24B5/00; F24B5/02; F24B5/028; F23; F23B; F23B5/00; F23B5/02; F23M; F23M11/00; F23M11/02; F23M11/04; F23M11/042; F24B13/00; F24B13/004
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
320 words
In a stove including a casing surrounding a combustion zone, a door in one wall of the casing, an air inlet in an upper region of the casing, a deflector in conjunction with said air inlet to deflect air within said casing past a transparent portion in a front face of said casing and to an outlet from said casing, a partition within said casing adjacent said outlet, said outlet being situated in said upper region of said casing remote from said transparent portion and said partition extends from the region of the outlet towards said transparent portion, so that in use, combustion air is drawn down inside the casing from the air inlet toward a primary combustion zone, past at least a portion of the transparent portion and then along the underside of the partition before passing by the partition into a secondary combustion zone and to the outlet, and a by-pass aperture in said partition and adjacent said outlet and closeable by a movable by-pass damper, the improvement comprising said damper is adapted to substantially float relative to said aperture so that it can be lifted away from and into and out of closing relationship with said by-pass aperture, and means to bias said damper toward said aperture, a movable control rod conncted to said damper to remotely operate said damper, the connection between the damper and the control rod comprising the damper being mounted upon the control rod with a tolerance for limited floating movement of the by-pass damper relative to the control rod, and an interlocking means to lock said door in a closed position when said by-pass aperture is closed by said damper comprising a movable finger mounted on said casing, and a cam portion on said control rod operatively engaging said finger so that said finger is movable by said cam portion into and out of interlocking engagement with a portion of the door.
Claim 2
Dependent Claim
320 words
In a stove including a casing surrounding a combustion zone, a door in one wall of the casing, an air inlet in an upper region of the casing, a deflector in conjunction with said air inlet to deflect air within said casing past a transparent portion in a front face of said casing and to an outlet from said casing, a partition within said casing adjacent said outlet, said outlet being situated in said upper region of said casing remote from said transparent portion and said partition extends from the region of the outlet towards said transparent portion, so that in use, combustion air is drawn down inside the casing from the air inlet toward a primary combustion zone, past at least a portion of the transparent portion and then along the underside of the partition before passing by the partition into a secondary combustion zone and to the outlet, and a by-pass aperture in said partition and adjacent said outlet and closeable by a movable by-pass damper, the improvement comprising said damper is adapted to substantially float relative to said aperture so that it can be lifted away from and into and out of closing relationship with said by-pass aperture, and means to bias said damper toward said aperture, a movable control rod conncted to said damper to remotely operate said damper, the connection between the damper and the control rod comprising the damper being mounted upon the control rod with a tolerance for limited floating movement of the by-pass damper relative to the control rod, and an interlocking means to lock said door in a closed position when said by-pass aperture is closed by said damper comprising a movable finger mounted on said casing, and a cam portion on said control rod operatively engaging said finger so that said finger is movable by said cam portion into and out of interlocking engagement with a portion of the door.
Claim 3
Dependent Claim
153 words
A stove as claimed in claim 1 and further comprising a locking finger mounting bracket on said casing, said locking finger being slidably mounted on said bracket so that one end is removably engageable with said door locking member and the other end slidably engages with said control rod cam portion, said cam portion comprising a part of said control rod between said bracket and said damper extending at an angle with respect to said control rod, so that upon movement of said control rod outwardly of said stove said damper is moved off of said by-pass aperture and said locking finger is moved out of locking engagement with said door locking member, and upon movement of said control rod inwardly of the stove with the door closed the damper moves into closing position with respect to said by-pass aperture and said locking finger engages in locking position with said door locking member.
Claim 4
Dependent Claim
25 words
A stove as claimed in claim 2 wherein said air inlet is positioned above said door and wherein said transparent portion is in said door.
Claim 5
Dependent Claim
18 words
A stove as claimed in claim 1 wherein the stove includes a heat exchanger for convection of air.
Claim 6
Dependent Claim
20 words
A stove as claimed in claim 1 wherein at least one baffle is positioned between said partition and said casing.
Claim 7
Dependent Claim
39 words
A stove as claimed in claim 1 wherein at least one baffle is provided with a plurality of spaced apart apertures therein, through which the gases of combustion and unburned gases pass to proceed into said secondary combustion zone.
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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) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |