Patent US4085727A successfully refreshed from Google Patents.
US4085727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air circulating heater for fireplaces
Assignee: Individual
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Filing: 1976-06-30
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Granted: 1978-04-25
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Expires: 1996-06-30
Abstract
Abstract An air circulating heater including a walled enclosure covered by a fire plate and adapted to be inserted within a regular or below a self-standing fireplace. A circulating fan is positioned behind a louvered front panel so that cold room air is drawn thereinto and directed upwardly and rearwardly by fan shaped baffles on the underside of the fire plate. The cold air is heated through the fire plate by heat within the fireplace and the heated air is returned to the room through the louvered panel.
Inventors
- 👤 Sherman R. Gillpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:44
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
186 words
An air circulating heater for a fireplace comprising a generally rectangular metal enclosure having a floor, and side and rear walls, and a front panel, said panel having central inlet louvered and end air discharge louvered areas, said enclosure being relatively shallow in height for positioning on the floor and in the bottom of said fireplace, a cover hinged to said enclosure and covering only the front portion thereof, electrical circulating fan means connected to a source of power and arranged in said enclosure beneath said cover and to the rear of said central louvered panel area, a flat metal fireplate arranged on said enclosure to the rear of said cover for heating air flowing therebeneath in said enclosure, and baffle plate means formed on the underside of said fireplate and extending into said enclosure for circulating air rearwardly and thence forwardly of said enclosure, cold air from the room being drawn through said central louvered panel area into said enclosure and directed through said baffle plate means for heating and recirculating through said enclosure and return to the room through said end discharge louvered areas.
Claim 2
Dependent Claim
186 words
An air circulating heater for a fireplace comprising a generally rectangular metal enclosure having a floor, and side and rear walls, and a front panel, said panel having central inlet louvered and end air discharge louvered areas, said enclosure being relatively shallow in height for positioning on the floor and in the bottom of said fireplace, a cover hinged to said enclosure and covering only the front portion thereof, electrical circulating fan means connected to a source of power and arranged in said enclosure beneath said cover and to the rear of said central louvered panel area, a flat metal fireplate arranged on said enclosure to the rear of said cover for heating air flowing therebeneath in said enclosure, and baffle plate means formed on the underside of said fireplate and extending into said enclosure for circulating air rearwardly and thence forwardly of said enclosure, cold air from the room being drawn through said central louvered panel area into said enclosure and directed through said baffle plate means for heating and recirculating through said enclosure and return to the room through said end discharge louvered areas.
Claim 3
Dependent Claim
29 words
An air circulating heater for a fireplace as defined in claim 1, wherein the louvers in said central areas extend transversely and project upwardly and rearwardly at an angle.
Claim 4
Dependent Claim
27 words
An air circulating heater for a fireplace as defined in claim 2, wherein the louvers in said end areas extend vertically and oppositely and inwardly and angularly.
Claim 5
Dependent Claim
40 words
An air circulating heater for a fireplace as defined in claim 1, wherein said circulating fan means includes dual fans, and said fan means is arranged on said floor to the rear of and adjacent to said central louvered area.
Claim 6
Dependent Claim
51 words
An air circulating heater for a fireplace as defined in claim 1, wherein said enclosure generally conforms to the area of said fireplace and is arranged on the floor thereof whereby heat from the fireplace is transmitted through said fireplate and to heat air being circulated therethrough by said fan means.
Claim 7
Dependent Claim
40 words
An air circulating heater for a fireplace as defined in claim 1, wherein said baffle plate means on said fireplate are arranged in two oppositely and angularly extending groups to direct air being circulated through said enclosure laterally and rearwardly.
Claim 8
Dependent Claim
44 words
An air circulating heater for a fireplace as defined in claim 6, wherein the louvers in said central panel area extend transversely and upwardly and inwardly at angles whereby incoming cold air is directed upwardly and rearwardly into engagement with said baffle plate means.
References Cited (Backward Citations)
US1640937A
Cited
FR661824A
Cited
GB622417A
Cited
US2743720A
Cited
US2744516A
Cited
US3190282A
Cited
US3452737A
Cited
US4008706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |