US4300528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace door seal
Assignee: Individual
•
Filing: 1979-10-19
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Granted: 1981-11-17
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Expires: 1999-10-19
Abstract
Abstract An improvement to the enclosure of fireplace apertures is provided by a sealing strip which engages pivotable glass doors having metallic frames and the frame of the fireplace enclosure. This sealing strip may be a lightweight gauge of brass, bronze, aluminum alloy, steel alloy, or other material capable of withstanding the heat of combustion inside the fireplace but having sufficient spring tension to effect a seal. The strip extends around the entire junction of the glass doors with the fireplace enclosure frame. The sealing strip is insertable into the conjunction of the glass with the glass door frame. Optionally, the strip may extend between moving doors to complete the sealing operation.
Inventors
- 👤 Charles O. Slemmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:26
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/192; F24C; F24C15/00; F24C15/02; F24C15/021
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
An improvement to the enclosure of fireplace apertures which use a metallic enclosure frame having an orthogonal recess within which pivotal metal framed glass doors reside, the pivotable nature of the doors having a gap between adjacent framed glass doors, said improvement comprising: a one piece metallic sealing strip engaging the pivotable framed glass doors with the metallic enclosure frame or with adjacent framed glass doors, said strip being bent along its length into three portions including an outside retaining portion inserted and held in cooperative frictional retention between the glass and the metal frame, a middle spring portion extendable between the pivotable glass doors and the metallic enclosure frame or framed glass doors exerting a positive spring tension, and an outside contact portion for sealing said strip across the orthogonal recess or the gap, whereby the pivotable glass doors are sealed within the metallic enclosure frame and between themselves to prevent leakage of air from the interior of a home into the combustion chamber of the fireplace and thence to the chimney.
Claim 2
Dependent Claim
173 words
An improvement to the enclosure of fireplace apertures which use a metallic enclosure frame having an orthogonal recess within which pivotal metal framed glass doors reside, the pivotable nature of the doors having a gap between adjacent framed glass doors, said improvement comprising: a one piece metallic sealing strip engaging the pivotable framed glass doors with the metallic enclosure frame or with adjacent framed glass doors, said strip being bent along its length into three portions including an outside retaining portion inserted and held in cooperative frictional retention between the glass and the metal frame, a middle spring portion extendable between the pivotable glass doors and the metallic enclosure frame or framed glass doors exerting a positive spring tension, and an outside contact portion for sealing said strip across the orthogonal recess or the gap, whereby the pivotable glass doors are sealed within the metallic enclosure frame and between themselves to prevent leakage of air from the interior of a home into the combustion chamber of the fireplace and thence to the chimney.
Claim 3
Dependent Claim
28 words
An improvement according to claim 1, wherein said sealing strip is of uniform width and each portion is of uniform width along the full length of the strip.
Claim 4
Dependent Claim
18 words
An improvement according to claim 2, wherein said retaining portion has a plurality of intermittent or continuous corrugations.
Claim 5
Dependent Claim
23 words
An improvement according to claim 3, wherein said retaining portion intersects said tensional portion at an angle from about 25° to about 35°.
Claim 6
Dependent Claim
23 words
An improvement according to claim 4, wherein said tension portion intersects said contact portion at an angle from about 90° to about 120°.
Claim 7
Dependent Claim
40 words
An improvement according to claim 1, wherein said tension portion is wider than the other two portions and bent at a midsection angle of from about 90° to about 100° when compressed by contact with the adjacent framed glass door.
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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |