Patent US3574505A successfully refreshed from Google Patents.
US3574505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating unit for cooking
Assignee: Ronson Corp
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Filing: 1969-06-23
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Granted: 1971-04-13
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Expires: 1989-06-23
Abstract
Abstract A fuel burning unit for cooking food in which a variable air supply is combined with a variable fuel supply mechanism to provide a uniform stable flame in which gas consumption is held to an efficient minimum. The air supply is varied by changing the size of an air admitting opening which is on the exterior portion of the fuel burning unit. The air opening is varied in size by reciprocal movement of a handle located on the fuel burning unit whereby desired amounts of air can be admitted into the unit to be mixed with a desired amount of fuel which can be ignited to produce a stable flame.
Inventors
- 👤 Everett L Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:58
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/62; F23D2203/00; F23D2203/007; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
A fuel burning mechanism for producing a variable flame which comprises: a. a base having an upstanding wall which surrounds and closes a reservoir for fuel; b. a burner head mounted on the fuel reservoir having a fuel passageway extending between the burner head and the fuel reservoir whereby fuel can be transferred to the burner head; c. fuel metering means mounted in the fuel passageway for varying the supply of fuel transferred to the burner head; and d. a variable air supply means on the fuel reservoir responsive to graduated movement of the fuel metering means for mixing a predetermined volume of air with a predetermined quantity of fuel in which the variable air supply means comprises a movable member on the fuel reservoir, the movable member varies the size of an air aperture leading to the fuel passageway.
Claim 2
Dependent Claim
140 words
A fuel burning mechanism for producing a variable flame which comprises: a. a base having an upstanding wall which surrounds and closes a reservoir for fuel; b. a burner head mounted on the fuel reservoir having a fuel passageway extending between the burner head and the fuel reservoir whereby fuel can be transferred to the burner head; c. fuel metering means mounted in the fuel passageway for varying the supply of fuel transferred to the burner head; and d. a variable air supply means on the fuel reservoir responsive to graduated movement of the fuel metering means for mixing a predetermined volume of air with a predetermined quantity of fuel in which the variable air supply means comprises a movable member on the fuel reservoir, the movable member varies the size of an air aperture leading to the fuel passageway.
Claim 3
Dependent Claim
33 words
A fuel burning mechanism as defined in claim 1 in which the fuel metering means comprises a tapered needle valve adapted to vary the flow path through an orifice in the fuel passageway.
Claim 4
Dependent Claim
49 words
A fuel burning mechanism as defined in claim 1 in which an elongated handle is attached to the fuel reservoir and is operatively connected to the needle valve such that movement of the handle serves to vary the size of the orifice in which the needle valve is located.
Claim 5
Dependent Claim
52 words
A fuel burning mechanism as defined in claim 1 in which the air aperture is formed between the fuel reservoir and the movable member such that movement of the movable member toward and away from the reservoir varies the size of the air aperture to respectively close and open the air aperture.
Claim 6
Dependent Claim
159 words
A fuel burning mechanism as defined in claim 1 which comprises: a. a base having an upstanding wall which surrounds and closes a reservoir for fuel; b. a burner head mounted on the fuel reservoir having a fuel passageway extending between the burner head and the fuel reservoir whereby fuel can be transferred tO the burner head; c. fuel metering means mounted in the fuel passageway for varying the supply of fuel transferred to the burner head; d. a variable air supply means on the fuel reservoir responsive to graduated movement of the fuel metering means for mixing a predetermined volume of air with a predetermined quantity of fuel, including; e. a handle having a bore longitudinally extending therethrough; f. a shaft reciprocally mounted within the bore; and g. the variable air supply means comprising the handle having means thereon responsive to movement of the shaft to vary the size of an air opening leading to the fuel passageway.
Claim 7
Dependent Claim
31 words
A fuel burning mechanism as defined in claim 5 in which stop means is formed on the handle to limit reciprocal movement of the handle with respect to the fuel reservoir.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |