Patent US3911894A successfully refreshed from Google Patents.
US3911894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating apparatus
Assignee: Individual
•
Filing: 1974-10-08
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Granted: 1975-10-14
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Expires: 1994-10-08
Abstract
Abstract A portable apparatus for fireplaces comprising a hollow sectional tubular body of heat conducting fire resistant material, the body having a plurality of heat conducting annular ribs thereon; a plurality of legs adjustably attached to the body to adjustably position the tubular body remote from the hearth of the fireplace, the body open at each end and an electrical motor driven fan disposed at one end thereof to force ambient air through the body, a louver disposed at the other open end of the body to selectively direct the then heated air as it leaves the body, the body having in its wall, near the louvered end, at least one air exhaust pipe having connecting means thereon, a flexible pipe adapted to be attached to the exhaust pipe to direct air from the body to other areas of the fireplace including the hearth to provide a positive source of air to the hearth to assist in starting of the fire in the fireplace, shutoff means to selectively shutoff the exhaust pipe.
Inventors
- 👤 Jr George Charles Richard
- 👤 John Henry Richard
- 👤 Anthony L Molennor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:29
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885; F24B1/1886
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A portable heating apparatus for fireplaces comprising a hollow sectional tubular body of heat conducting fire resistant material, said body having a plurality of heat conducting annular ribs thereon, a plurality of legs adjustably attached to said body to adjustablY position said tubular body remote from the hearth of said fireplace, said body open at each end and an electrical motor driven fan disposed at one end of thereof to force ambient air through said body, a louver disposed at the other open end of said body to selectively direct the then heated air as it leaves said body, said body having in its wall, near the louvered end, at least one air exhaust pipe having connecting means thereon, a flexible pipe adapted to be attached to said exhaust pipe to direct air from said body to other areas of the fireplace including the hearth to provide a positive source of air to said hearth to assist in starting of the fire in said fireplace, shutoff means to selectively shutoff said exhaust pipe.
Claim 2
Dependent Claim
173 words
A portable heating apparatus for fireplaces comprising a hollow sectional tubular body of heat conducting fire resistant material, said body having a plurality of heat conducting annular ribs thereon, a plurality of legs adjustably attached to said body to adjustablY position said tubular body remote from the hearth of said fireplace, said body open at each end and an electrical motor driven fan disposed at one end of thereof to force ambient air through said body, a louver disposed at the other open end of said body to selectively direct the then heated air as it leaves said body, said body having in its wall, near the louvered end, at least one air exhaust pipe having connecting means thereon, a flexible pipe adapted to be attached to said exhaust pipe to direct air from said body to other areas of the fireplace including the hearth to provide a positive source of air to said hearth to assist in starting of the fire in said fireplace, shutoff means to selectively shutoff said exhaust pipe.
Claim 3
Dependent Claim
40 words
A heating apparatus in accordance with claim 1, wherein said connecting means includes a bayonet joint having bayonet studs on the outer surface of said air exhaust pipe and a bayonet slot disposed on the end of said flexible pipe.
Claim 4
Dependent Claim
34 words
A heating apparatus in accordance with claim 2, wherein the sections of the body is manufactured from formed sheet metal, said sections being attached to each other by fastening means including sheet metal screws.
Claim 5
Dependent Claim
28 words
A heating apparatus in accordance with claim 3, wherein said shutoff means includes a detachable cap adapted to be fitted to the open end of said flexible pipe.
Claim 6
Dependent Claim
27 words
A heating apparatus in accordance with claim 3, wherein the inner area of said body is circular in cross section having a diameter of approximately five inches.
Claim 7
Dependent Claim
29 words
A heating apparatus in accordance with claim 3, wherein the inner area of said air exhaust pipe is circular in cross section having a diameter of approximatley one inch.
Claim 8
Dependent Claim
32 words
A heating apparatus in accordance with claim 1, wherein a screen is disposed at the end of the tube upstream of said fan to remove certain particulate matter from the ambient air.
Claim 9
Dependent Claim
46 words
A heating apparatus in accordance with claim 1, wherein said air exhaust pipe protrudes into the inner area of said body, said air exhaust pipe being cylindrical in shape and presenting an open substantially triangularly shaped area to the air as it flows through said body.
Claim 10
Dependent Claim
22 words
A heating apparatus in accordance with claim 8, wherein said air exhaust pipes are positioned near the louvered end of said body.
Claim 11
Dependent Claim
84 words
A heating apparatus in accordance with claim 1, wherein there are three legs disposed equidistantly about said body, said three legs each disposed in a bracket fixedly attached to the outer surface of said body, a series of apertures in said legs spaced along the longitudinal axis thereof, an aperture in said bracket and a pin adapted to fit in said aperture of said bracket and one said aperture of said leg to fixedly and selectively position said leg with respect to said body.
References Cited (Backward Citations)
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Cited
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |