Patent US2591494A successfully refreshed from Google Patents.
US4037582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil stove
Assignee: INDUSTRIAL AND MARINE SERVICES SCOTLAND Ltd
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Filing: 1975-11-26
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Granted: 1977-07-26
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Expires: 1995-11-26
Abstract
Abstract An air-heating appliance is described which uses used engine lubricating oil as a fuel. The oil is fed by gravity to a burner consisting of an open cylindrical pan having a perforated side-wall and which is divided horizontally by an apertured fire plate. The pan is surrounded by a cylindrical casing which is spaced from the walls of the pan. A flue duct is arranged concentrically with and extends from the open top of the pan and is provided with jacket to define a heat exchange passage around the flue duct for air to be heated. Air flow through the heat exchange passage is induced by a fan and is directed and redirected in the passage by angled vanes disposed therein. Initially, the oil is ignited by an electric heating element which is switched off once self-ignition conditions pertain.
Inventors
- 👤 Isaac N. Moody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:50
CPC Classifications
F; F23; F23D; F23D5/00; F23D5/02; F23D5/04; F24; F24C; F24C5/00; F24C5/02; F24H; F24H9/00; F24H9/18; F24H9/1809; F24H9/1832; F24H9/1836; F24H9/1854; F24H9/1877; F24H9/1881
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A heating appliance incorporating combustion apparatus comprising an open pan having a floor portion and a cylindrical side-wall portion with perforations therein, the interior of said pan being divided by a fire plate in the form of a partition arranged generally parallel with and spaced from said floor portion, said partition having therein apertures which are arranged in concentric rings and are alternately convergent and divergent in the direction away from said floor portion of said pan, said perforations in said side-wall portion being disposed in circumferential rows both above and below said partition with the perforations in the uppermost row being smaller and more closely spaced than in the other rows, means for introducing oil into said pan at a point between said floor portion and said partition, heating means within said pan close to said floor portion, a flue duct extending from the open side of said pan, and heat exchange means surrounding said flue duct.
Claim 2
Dependent Claim
158 words
A heating appliance incorporating combustion apparatus comprising an open pan having a floor portion and a cylindrical side-wall portion with perforations therein, the interior of said pan being divided by a fire plate in the form of a partition arranged generally parallel with and spaced from said floor portion, said partition having therein apertures which are arranged in concentric rings and are alternately convergent and divergent in the direction away from said floor portion of said pan, said perforations in said side-wall portion being disposed in circumferential rows both above and below said partition with the perforations in the uppermost row being smaller and more closely spaced than in the other rows, means for introducing oil into said pan at a point between said floor portion and said partition, heating means within said pan close to said floor portion, a flue duct extending from the open side of said pan, and heat exchange means surrounding said flue duct.
Claim 3
Dependent Claim
24 words
An appliance as claimed in claim 11, including a casing having openings therethrough to permit air to reach the side-wall portion of the pan.
Claim 4
Dependent Claim
43 words
An appliance as claimed in claim 2 wherein said heat exchange means comprises a wall jacketing a portion of the flue duct thereby to define a heat exchange passage wherein air may flow in contact with the external surface of the flue duct.
Claim 5
Dependent Claim
25 words
An appliance as claimed in claim 3, including vanes arranged in the heat exchange passage to direct and redirect flow of air in the passage.
Claim 6
Dependent Claim
31 words
An appliance as claimed in claim 4, wherein the said vanes are in heat conducting engagement with the external surface of the flue duct and are spaced from the jacketing wall.
Claim 7
Dependent Claim
22 words
An appliance as claimed in claim 5, including baffles incorporated in the flue duct to increase the path-length of gases flowing therethrough.
Claim 8
Dependent Claim
53 words
An appliance as claimed in claim 6, wherein the ratio of the total area of perforations in the said side-wall portion of the pan between the side partition and the floor portion to the total area of the perforations in the side-wall portion on the opposite side of the partition is approximately 1:5.
Claim 9
Dependent Claim
45 words
An appliance as claimed in claim 7, wherein the ratio of the total area of the perforations in the said side-wall portion of the pan between said partition and the floor portion to the total area of the apertures in the partition is approximately 1:90.
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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |