Patent US4121561A successfully refreshed from Google Patents.
US4121561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stove
Assignee: Individual
•
Filing: 1977-03-28
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Granted: 1978-10-24
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Expires: 1997-03-28
Abstract
Abstract A box stove made essentially of two pieces of sheet metal bent into the forms of interlocking "U"s and assembled together. The stove containing a roof-shaped baffle below the flue exit.
Inventors
- 👤 Richard G. Cote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:38
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/02; Y; Y10; Y10S; Y10S220/00; Y10S220/25; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
A heating stove of the box type having a body welded from two sheets of metal comprising: (a) a first sheet of metal bent in the shape of a "U" having a closed end and two sides; (b) a second sheet of metal bent in the shape of a "U" having a closed end, a top at least as long as one of said two sides, a bottom longer than any of said top and two sides and interlocking with said first sheet to form an enclosed firebox; (c) a door in the closed end of said first sheet of metal; (d) a flue opening in said top of said second sheet of metal; (e) a solid, roof-shaped baffle plate inside said firebox extending to and slidable supported from said two sides; and (f) support means attached to said bottom of said second sheet of metal, whereby a box stove is provided having an extended hearth formed from the bottom of said second sheet.
Claim 2
Dependent Claim
164 words
A heating stove of the box type having a body welded from two sheets of metal comprising: (a) a first sheet of metal bent in the shape of a "U" having a closed end and two sides; (b) a second sheet of metal bent in the shape of a "U" having a closed end, a top at least as long as one of said two sides, a bottom longer than any of said top and two sides and interlocking with said first sheet to form an enclosed firebox; (c) a door in the closed end of said first sheet of metal; (d) a flue opening in said top of said second sheet of metal; (e) a solid, roof-shaped baffle plate inside said firebox extending to and slidable supported from said two sides; and (f) support means attached to said bottom of said second sheet of metal, whereby a box stove is provided having an extended hearth formed from the bottom of said second sheet.
Claim 3
Dependent Claim
23 words
A heating stove according to claim 1 wherein said top is longer than either of said two sides to form a protective overhang.
Claim 4
Dependent Claim
28 words
A heating stove according to claim 2 wherein said second sheet of metal is wider than said first sheet of metal to provide protective flanges along said sides.
Claim 5
Dependent Claim
29 words
A heating stove according to claim 1 wherein a roof-shaped solid baffle is mounted horizontally from said sides with its ridge spaced within 7.5 cm of said flue opening.
Claim 6
Dependent Claim
22 words
A heating stove according to claim 4 wherein the enclosed angle of said roof is in the range of 130° to 145°.
Claim 7
Dependent Claim
28 words
A heating stove according to claim 5 wherein the length of said baffle is in the range of one half to two thirds the length of said sides.
Claim 8
Dependent Claim
62 words
A substantially rectangular wood burning stove according to claim 1 wherein said baffle plate is made of a single sheet of metal bent uniformly along a central ridge to provide an enclosed angle in the range of 130° to 145° and having a length along said ridge in the range of one half to two thirds the side length of said stove.
References Cited (Backward Citations)
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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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |