US4011996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swirl type pressure fuel atomizer
Assignee: IHI Corp
•
Filing: 1975-09-18
•
Granted: 1977-03-15
•
Expires: 1995-09-18
Abstract
Abstract An improvement of a swirl type fuel atomizer is disclosed in which a plurality of notches are equiangularly formed around an opening of a single-nozzle hole so that the liquid fuel injected may be divided into a plurality of fuel spray patterns. The complete combustion with a relatively low temperature may be ensured so that the emission of nitrogen oxides may be substantially eliminated or reduced.
Inventors
- 👤 Shoichi Tsuji
- 👤 Minoru Asai
- 👤 Yuichi Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/38; F23D11/383; B; B05; B05B; B05B1/00; B05B1/02; B05B1/34; B05B1/3405
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
A burner assembly comprising a housing having a passage for receiving fuel at one end thereof, a nozzle tip extending from said housing and defining an outlet opening in communication with the other end of said passage, and means for imparting a swirl to said fuel as it passes to said nozzle tip for discharge through said outlet, said nozzle tip being frustro-conical in shape and having a plurality of sawtooth-shaped grooves formed therein, each groove defined by a first wall extending from the end of said tip and located in a plane including the longitudinal axis of the tip and a second wall which extends from the base of said first wall to the first wall of an adjacent groove, to divide the fuel discharging from said nozzle tip into a plurality of separate spray patterns.
Claim 2
Dependent Claim
137 words
A burner assembly comprising a housing having a passage for receiving fuel at one end thereof, a nozzle tip extending from said housing and defining an outlet opening in communication with the other end of said passage, and means for imparting a swirl to said fuel as it passes to said nozzle tip for discharge through said outlet, said nozzle tip being frustro-conical in shape and having a plurality of sawtooth-shaped grooves formed therein, each groove defined by a first wall extending from the end of said tip and located in a plane including the longitudinal axis of the tip and a second wall which extends from the base of said first wall to the first wall of an adjacent groove, to divide the fuel discharging from said nozzle tip into a plurality of separate spray patterns.
Claim 3
Dependent Claim
18 words
The burner assembly of claim 1, wherein said grooves extend for the entire thickness of said nozzle tip.
Claim 4
Dependent Claim
16 words
The burner assembly of claim 1, wherein said grooves extend equi-angularly with respect to each other.
Claim 5
Dependent Claim
34 words
The burner assembly of claim 1, wherein said second wall of each groove extends in a substantially helical path from the base of said first wall to the first wall of an adjacent groove.
Claim 6
Dependent Claim
22 words
The burner assembly of claim 1, wherein said nozzle tip includes two sawtooth-shaped grooves with the first walls thereof spaced 180° apart.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |