US3904347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion apparatus with ultrasonic vibrator
Assignee: Panasonic Holdings Corp
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Filing: 1973-11-09
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Granted: 1975-09-09
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Expires: 1993-11-09
Abstract
Abstract A combustion apparatus is provided of the type comprising an outer air duct with a liquid fuel atomizing horn housed within the outer air duct coaxially thereof. The atomizing horn is vibrated by an ultrasonic vibrator. An inner air duct is located within the outer air duct coaxially thereof between the front portion of said horn and said outer air duct. Inner vanes or air swirling vanes are located within said inner air duct. Outer vanes or air swirling vanes are located between said inner and outer air ducts. An outwardly diverging frustoconical cap is attached to the front open end of the outer air duct. The front portion of the cone-shaped cap is radially inwardly bent to define a center opening; the tips of the inner air swirling vanes are separated from each other and spaced apart from the front end portion of the horn; the ratio of an angle theta 1 minus 10 between the outer and inner air swirling vanes and the axis of the horn to an angle theta 2 or oblique angle between the tapered portion of the cap and the axis of the horn is between 3/10 and unity; and the ratio of the diameter of the center opening of the cap to a length in the axial direction of the frustoconical cap is between 1.25 and 3.
Inventors
- 👤 Nerumitsu Rokudo
- 👤 Toshiyuki Ishiguro
- 👤 Makoto Hori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:34
CPC Classifications
B; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B17/0623; B05B17/063; B01; B01F; B01F31/00; B01F31/80; B01F31/84; B01F31/841; B01J; B01J19/00; B01J19/08; B01J19/10; F; F23; F23D; F23D11/00; F23D11/34; F23D11/345
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
242 words
In a combustion apparatus of the type comprising an outer air duct with a liquid fuel atomizing horn which is vibrated by an ultrasonic vibrator housed within said outer air duct coaxially thereof, an inner air duct located within said outer air duct coaxially thereof between the front portion of said horn and said outer air duct, inner air swirling vanes located within said inner air duct, outer air swirling vanes located within said inner and outer air ducts, and an outwardly diverging cone-shaped cap attached to the front end of said outer air duct, the front portion of said cone-shaped cap being radially inwardly bent to define a center opening, the improvement wherein the radially inner ends of said inner air swirling vanes are spaced apart from each other and are spaced from said horn to define a space between said horn and said inner air swirling vanes, whereby the spaces between said inner air swirling vanes are open to said space between said horn and inner swirling vanes, and the radially outer ends of said swirling vanes are on the inner peripheral wall of said inner air duct, the ratio theta 2/ theta 1 minus 1 being between 3/10 and unity, wherein theta 1 is the angle between said inner and outer air swirling vanes and the axis of said horn and theta 2 is the aNgle between the tapered portion of said cap and said axis of said horn.
Claim 2
Dependent Claim
242 words
In a combustion apparatus of the type comprising an outer air duct with a liquid fuel atomizing horn which is vibrated by an ultrasonic vibrator housed within said outer air duct coaxially thereof, an inner air duct located within said outer air duct coaxially thereof between the front portion of said horn and said outer air duct, inner air swirling vanes located within said inner air duct, outer air swirling vanes located within said inner and outer air ducts, and an outwardly diverging cone-shaped cap attached to the front end of said outer air duct, the front portion of said cone-shaped cap being radially inwardly bent to define a center opening, the improvement wherein the radially inner ends of said inner air swirling vanes are spaced apart from each other and are spaced from said horn to define a space between said horn and said inner air swirling vanes, whereby the spaces between said inner air swirling vanes are open to said space between said horn and inner swirling vanes, and the radially outer ends of said swirling vanes are on the inner peripheral wall of said inner air duct, the ratio theta 2/ theta 1 minus 1 being between 3/10 and unity, wherein theta 1 is the angle between said inner and outer air swirling vanes and the axis of said horn and theta 2 is the aNgle between the tapered portion of said cap and said axis of said horn.
Claim 3
Dependent Claim
51 words
A combustion apparatus as defined in claim 1 wherein the ratio of a diameter D of said center opening of said cap to the length L in the axial direction between the open end of said outer air duct and the front end of said cap is between 1.25 and 3.
Claim 4
Dependent Claim
22 words
A combustion apparatus as defined in claim 2 wherein theta 1 45*, theta 2 20*, D 70 mm and L 25 mm.
Claim 5
Dependent Claim
232 words
In a combustion apparatus of the type comprising an outer air duct with a liquid fuel atomizing horn which is vibrated by an ultrasonic vibrator housed within said outer air duct coaxially thereof, an inner duct located within said outer air duct coaxially thereof between the front portion of said horn and said outer air duct, inner air swirling vanes located within said inner air duct, outer air swirling vanes located between said inner and outer air ducts and an outwardly diverging cone-shaped cap attached to the front end of said outer air duct, the front portion of said cone-shaped cap being radially inwardly bent to define a center opening, the improvement wherein the radially inner ends of said inner air swirling vanes are spaced apart from each other and are spaced from said horn to define a space between said horn and said inner air swirling vanes, whereby the spaces between said inner air swirling vanes are open to said space between said horn and inner swirling vanes, and the radially outer ends of said inner swirling vanes are on the inner peripheral wall of said inner air duct, the ratio of the diameter D of said center opening of said cap to the length L in the axial direction between the open end of said outer air duct and the front end of said cap being between 1.25 and 3.
Claim 6
Dependent Claim
232 words
In a combustion apparatus of the type comprising an outer air duct with a liquid fuel atomizing horn which is vibrated by an ultrasonic vibrator housed within said outer air duct coaxially thereof, an inner duct located within said outer air duct coaxially thereof between the front portion of said horn and said outer air duct, inner air swirling vanes located within said inner air duct, outer air swirling vanes located between said inner and outer air ducts and an outwardly diverging cone-shaped cap attached to the front end of said outer air duct, the front portion of said cone-shaped cap being radially inwardly bent to define a center opening, the improvement wherein the radially inner ends of said inner air swirling vanes are spaced apart from each other and are spaced from said horn to define a space between said horn and said inner air swirling vanes, whereby the spaces between said inner air swirling vanes are open to said space between said horn and inner swirling vanes, and the radially outer ends of said inner swirling vanes are on the inner peripheral wall of said inner air duct, the ratio of the diameter D of said center opening of said cap to the length L in the axial direction between the open end of said outer air duct and the front end of said cap being between 1.25 and 3.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |