Patent US4553528A successfully refreshed from Google Patents.
US4553528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-standing stove and fireplace apparatus
Assignee: Individual
•
Filing: 1982-01-04
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Granted: 1985-11-19
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Expires: 2002-01-04
Abstract
Abstract Free-standing stove/fireplace apparatus includes a plurality of heated air chambers disposed about a firebox and flue, with air intake and air outlet passages located at various heights for the convection heating of air in the room in which the apparatus is disposed and with provisions for utilizing outside air for combustion purposes to allow the firebox to be isolated from the room air.
Inventors
- 👤 William T. Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:26
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/181; F24B7/00; F24B7/005; F24B7/02
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
382 words
Free-standing fireplace apparatus for a room, comprising, in combination: combustion chamber means in which combustion occurs to provide heat and including a front portion, a rear portion, and first and second side portions; chimney flue means communicating with the combustion chamber and extending upwardly therefrom through which combustion gases flow from the combustion chamber and out of the structure in which the fireplace apparatus is disposed; heated air chamber means through which air flows to be heated by the heat from the combustion chamber means, including a first heated air chamber adjacent to the first side portion of the combustion chamber means and the chimney flue means, a second heated air chamber adjacent to the second side portion of the combustion chamber means and the chimney flue means, third heated air chamber means adjacent to the rear portion of the combustion chamber means and the chimney flue means and communicating with the first and second heated air chambers at a lower part of the third heated air chamber means, and fourth heated air chamber means above the combustion chamber means communicating with the third heated air chamber means through the chimney flue means; and combustion air means disposed rearwardly of and adjacent to the first and second heated air chambers and the third heated air chamber means and disposed about the chimney flue means for providing a flow of outside air to the combustion chamber for warming the air to the combustion chamber and for cooling the combustion gases flowing through the chimney flue means; and opening means through which air flows into and out of the heated air chamber means, including a first opening in the first heated air chamber through which room air flows into the first heated air chamber, a second opening in the second heated air chamber through which room air flows into the second heated air chamber, a third opening below the first side portion of the combustion chamber means and communicating with the third heated air chamber means through which room air flows into the third heated air chamber means, a first outlet through which heated air flows from the fourth heated air chamber means, and a second outlet above the first outlet through which heated air flows from the first and second heated air chambers.
Claim 2
Dependent Claim
382 words
Free-standing fireplace apparatus for a room, comprising, in combination: combustion chamber means in which combustion occurs to provide heat and including a front portion, a rear portion, and first and second side portions; chimney flue means communicating with the combustion chamber and extending upwardly therefrom through which combustion gases flow from the combustion chamber and out of the structure in which the fireplace apparatus is disposed; heated air chamber means through which air flows to be heated by the heat from the combustion chamber means, including a first heated air chamber adjacent to the first side portion of the combustion chamber means and the chimney flue means, a second heated air chamber adjacent to the second side portion of the combustion chamber means and the chimney flue means, third heated air chamber means adjacent to the rear portion of the combustion chamber means and the chimney flue means and communicating with the first and second heated air chambers at a lower part of the third heated air chamber means, and fourth heated air chamber means above the combustion chamber means communicating with the third heated air chamber means through the chimney flue means; and combustion air means disposed rearwardly of and adjacent to the first and second heated air chambers and the third heated air chamber means and disposed about the chimney flue means for providing a flow of outside air to the combustion chamber for warming the air to the combustion chamber and for cooling the combustion gases flowing through the chimney flue means; and opening means through which air flows into and out of the heated air chamber means, including a first opening in the first heated air chamber through which room air flows into the first heated air chamber, a second opening in the second heated air chamber through which room air flows into the second heated air chamber, a third opening below the first side portion of the combustion chamber means and communicating with the third heated air chamber means through which room air flows into the third heated air chamber means, a first outlet through which heated air flows from the fourth heated air chamber means, and a second outlet above the first outlet through which heated air flows from the first and second heated air chambers.
Claim 3
Dependent Claim
63 words
The apparatus of claim 1 in which the combustion chamber means includes a combustion chamber communicating with the chimney flue means and door means for preventing air from within the structure in which the apparatus is disposed from flowing into the combustion chamber when the door means is closed and for adding fuel to the combustion chamber when the door means is open.
Claim 4
Dependent Claim
40 words
The apparatus of claim 2 in which the fourth heated air chamber means includes a fourth heated air chamber and a fourth opening above the door means through which room air flows generally horizontally into the fourth heated air chamber.
Claim 5
Dependent Claim
58 words
The apparatus of claim 3 in which the fourth heated air chamber means further includes a first generally horizontal portion above the combustion chamber, a second generally vertical portion comprising a continuation of the first portion and disposed in front of the chimney flue means, and a horizontally extending stove top comprising the top of the first portion.
Claim 6
Dependent Claim
88 words
The apparatus of claim 1 in which the third heated air chamber means includes a third heated air chamber between the combustion chamber and chimney flue means and the combustion air means, a manifold remote from the third heated air chamber to which air to be heated flows through the third opening, and hollow grate means extending from the manifold to the third heated air chamber for supporting the fuel to be combusted and for providing an air flow from the manifold to the third heated air chamber.
Claim 7
Dependent Claim
23 words
The apparatus of claim 5 in which air flows from the first and second heated air chambers to the third heated air chamber.
Claim 8
Dependent Claim
64 words
The apparatus of claim 5 in which the combustion air means includes a combustion air passage extending adjacent to the third heated air chamber and remote from the fourth heated air chamber means for pre-heating the combustion air flowing in the said passage and an air valve for controlling the flow of combustion air from the combustion air passage to the combustion chamber means.
Claim 9
Dependent Claim
40 words
The apparatus of claim 1 in which the fourth heated air chamber means includes a first portion above the combustion chamber means and a second portion communicating with the first portion and disposed in front of the chimney flue means.
Claim 10
Dependent Claim
74 words
The apparatus of claim 8 in which the third heated air chamber means includes a third heated air chamber and tube means extending through the chimney flue means for providing communication between the third heated air chamber and the second portion of the fourth heated air chamber means and comprising heat exchange means for heating the air flowing through the tube means with heat from the combustion gases flowing in the chimney flue means.
Claim 11
Dependent Claim
36 words
The apparatus of claim 1 in which the heated air chamber means further includes a fifth heated air chamber and a sixth heated air chamber disposed above the third and fourth heated air chamber means, respectively.
Claim 12
Dependent Claim
34 words
The apparatus of claim 10 in which the first and second heated air chambers communicate with and provide a flow of air to the fifth heated air chamber and the sixth heated air chamber.
Claim 13
Dependent Claim
33 words
The apparatus of claim 11 in which heated air from the first, second, and fifth heated air chambers flows out of the apparatus from the sixth heated air chamber through the second outlet.
Claim 14
Dependent Claim
36 words
The apparatus of claim 10 in which the heated air chamber means further includes a collar disposed about the chimney flue means which comprises the top of the first, second, fifth, and sixth heated air chambers.
Claim 15
Dependent Claim
19 words
The apparatus of claim 13 in which the chimney flue means includes a chimney flue extending through the collar.
Claim 16
Dependent Claim
25 words
The apparatus of claim 14 in which the chimney flue means further includes a chimney flue section disposed above the collar and the chimney flue.
Claim 17
Dependent Claim
29 words
The apparatus of claim 15 in which the collar and the chimney flue include means for securing the chimney flue section to the collar and to the chimney flue.
Claim 18
Dependent Claim
37 words
The apparatus of claim 16 in which the means for securing the chimney flue and the collar to the chimney flue section comprises a plurality of U-bend elements secured to the collar and to the chimney flue.
Claim 19
Dependent Claim
24 words
The apparatus of claim 15 in which the chimney flue section includes a flue portion through which combustion gases flow from the chimney flue.
Claim 20
Dependent Claim
43 words
The apparatus of claim 18 in which the chimney flue section further includes baffle means for providing a downward flow of air remote from the flue portion and an upward flow of air adjacent to the flue portion for insulating the flue portion.
Claim 21
Dependent Claim
37 words
The apparatus of claim 19 in which a portion of the downward flow of air from the chimney flue section communicates with the combustion air means to provide a flow of air to the combustion chamber means.
Claim 22
Dependent Claim
36 words
The apparatus of claim 19 in which the baffle means includes an inner baffle portion and an outer baffle portion to provide a first and a second downward flow of air remote from the flue portion.
Claim 23
Dependent Claim
45 words
The apparatus of claim 21 in which the inner baffle portion is secured to the collar and spaced above the collar and the first downward flow of air flows underneath the first baffle portion and upwardly about the flue portion for cooling the flue portion.
Claim 24
Dependent Claim
35 words
The apparatus of claim 22 in which the outer baffle means is secured to the collar and the second downward flow of air flows about the outer baffle and downwardly in the combustion air means.
Claim 25
Dependent Claim
25 words
The apparatus of claim 15 in which the chimney flue means further includes a rain cap and spark arrestor secured to the chimney flue section.
Claim 26
Dependent Claim
32 words
The apparatus of claim 24 in which the chimney flue section includes a plurality of U-bend elements for receiving and securing the rain cap and spark arrestor to the chimney flue section.
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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) | 1988-11-18 | 1989-05-20 | 1989-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-18 | 1993-05-20 | 1993-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-18 | 1997-05-20 | 1997-11-19 | $7700.00 | Window Closed / Lapsed |