US3880141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating systems for fireplaces
Assignee: Individual
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Filing: 1974-02-21
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Granted: 1975-04-29
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Expires: 1994-02-21
Abstract
Abstract A heating system easily installed in fireplaces using surplus fireplace heat to heat air for delivery into a room or rooms of a building. A relatively flat heat exchanger is positioned at the rear of the fireplace opening or chamber, the heat exchanger being inclined upwardly and forwardly. An air inlet duct is connected to the lower end of the heat exchanger and a hot air outlet duct is connected to the upper end of the heat exchanger. There is a cabinet in the lower part of which is housed an electric fan or pump for blowing air from the room through the inlet duct, through the heated air duct into the upper part of the cabinet which is partitioned. From the upper part of the cabinet, the heated air is blown through openings in the walls of the cabinet and this air is directed by louvers so as to spred through the area to be heated. At its upper end, the heat exchanger is held in position by an adjustable rod and sleeve mechanism and within the heat exchanger is a primary baffle or partition which separates lower and upper chambers of the heat exchanger and there are a plurality of secondary baffles which cause the air within the heat exchanger to be swirled and agitated so that it will be quickly and effectively heated while passing through the heat exchanger.
Inventors
- 👤 Harold R Abshear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:00
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
132 words
Heating systems for fireplaces, comprising: a heat exchanger adapted to be disposed at the rear of the fireplace opening; a horizontal partition separating the interior of the heat exchanger into a lower chamber and an upper chamber, there being a flow passage between the lower and upper chambers; means for introducing air to be heated into one of said chambers and an outlet for heated air for the other chamber; a plurality of secondary baffles in each of said chambers for causing air passing through the chambers to be agitated; said heat exchanger being inclined upwardly and forwardly; and an adjustable brace for the upper end of the heat exchanger, said brace being adapted to engage the front upper Wall of a fireplace for positioning the heat exchanger in its inclined position.
Claim 2
Dependent Claim
132 words
Heating systems for fireplaces, comprising: a heat exchanger adapted to be disposed at the rear of the fireplace opening; a horizontal partition separating the interior of the heat exchanger into a lower chamber and an upper chamber, there being a flow passage between the lower and upper chambers; means for introducing air to be heated into one of said chambers and an outlet for heated air for the other chamber; a plurality of secondary baffles in each of said chambers for causing air passing through the chambers to be agitated; said heat exchanger being inclined upwardly and forwardly; and an adjustable brace for the upper end of the heat exchanger, said brace being adapted to engage the front upper Wall of a fireplace for positioning the heat exchanger in its inclined position.
Claim 3
Dependent Claim
83 words
The invention defined by claim 1, including a housing having upper and lower chambers therein, one of said chambers having an inlet opening and the other said chamber having a plurality of outlet openings; a fan for drawing air into the chamber with the inlet opening; conduit means operable connecting the fan with one of the chambers of the heat exchanger; a conduit connecting the other chamber of the heat exchanger with the chamber of the housing having the plurality of outlet openings.
Claim 4
Dependent Claim
28 words
The invention defined by claim 2, including louvers for the various openings of said other chamber for directing air in various directions into an area to be heated.
Claim 5
Dependent Claim
180 words
A fireplace heating system, comprising: a relatively flat heat exchanger including front and rear walls; a horizontal partition in the heat exchanger dividing said heat exchanger into lower and upper chambers, said partition being of less length than the width of the heat exchanger to provide an air passage between the free end of said partition and the adjacent side wall of said heat exchanger; a plurality of baffles within each of the chambers of the heat exchanger to cause air passing through the heat exchanger to be agitated and to swirl; said heat exchanger being inclined upwardly and forwardly; a housing having a lower and an upper chamber, the lower chamber having an inlet opening and the upper chamber having a plurality of outlet openings; a conduit connecting the lower chamber of the housing with the lower chamber of the heat exchanger; a conduit connecting the upper chamber of the heat exchanger with the upper chamber of the housing; and means for forcing air from the lower chamber of the housing into the lower chamber of the heat exchanger.
Claim 6
Dependent Claim
180 words
A fireplace heating system, comprising: a relatively flat heat exchanger including front and rear walls; a horizontal partition in the heat exchanger dividing said heat exchanger into lower and upper chambers, said partition being of less length than the width of the heat exchanger to provide an air passage between the free end of said partition and the adjacent side wall of said heat exchanger; a plurality of baffles within each of the chambers of the heat exchanger to cause air passing through the heat exchanger to be agitated and to swirl; said heat exchanger being inclined upwardly and forwardly; a housing having a lower and an upper chamber, the lower chamber having an inlet opening and the upper chamber having a plurality of outlet openings; a conduit connecting the lower chamber of the housing with the lower chamber of the heat exchanger; a conduit connecting the upper chamber of the heat exchanger with the upper chamber of the housing; and means for forcing air from the lower chamber of the housing into the lower chamber of the heat exchanger.
Claim 7
Dependent Claim
32 words
The invention defined by claim 4, including an adjustable brace attached to the upper end of the heat exchanger retaining said heat exchanger in an inclined position when installed in a fireplace.
Claim 8
Dependent Claim
22 words
The invention defined by claim 5, including louvers for the various outlet openings of the housing for directing air in various directions.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |