US3638859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid atomizers
Assignee: NAT RES DEV
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Filing: 1969-08-01
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Granted: 1972-02-01
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Expires: 1989-08-01
Abstract
Abstract Air issuing at high velocity from an annular nozzle under choked flow conditions is directed at a resonator constituted by a well formed in a cup spaced from the nozzle and coaxial with it. The airflow is thus induced to vibrate and liquid is injected within the annular curtain and in the same direction to impinge on the vibrating air mass by which it is atomized into fine droplets.
Inventors
- 👤 John James Macfarlane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:44
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/34; B; B05; B05B; B05B1/00; B05B1/26; B05B1/262; B05B1/265; B05B17/00; B05B17/04; B05B17/06; B05B17/0692; F23D11/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
A fluid atomizer comprising a body having an annular nozzle arranged to discharge a high-velocity gas stream and at least one orifice located inside the nozzle and arranged to discharge a stream of liquid in substantially the same axial direction as the gas stream, an open-ended resonator spaced from the nozzle and substantially coaxial therewith, with its mouth directed towards the nozzle, and a stem extending along the nozzle axis between the resonator and the body, means for feeding a liquid to said orifice, said liquid-feeding means including a passage in said stem and an annular passage communicating with said orifice, said passage in said stem and said annular passage communicating with each other at a point spaced from said orifice.
Claim 2
Dependent Claim
121 words
A fluid atomizer comprising a body having an annular nozzle arranged to discharge a high-velocity gas stream and at least one orifice located inside the nozzle and arranged to discharge a stream of liquid in substantially the same axial direction as the gas stream, an open-ended resonator spaced from the nozzle and substantially coaxial therewith, with its mouth directed towards the nozzle, and a stem extending along the nozzle axis between the resonator and the body, means for feeding a liquid to said orifice, said liquid-feeding means including a passage in said stem and an annular passage communicating with said orifice, said passage in said stem and said annular passage communicating with each other at a point spaced from said orifice.
Claim 3
Dependent Claim
21 words
A fluid atomizer according to claim 1 in which the orifice is of annular configuration and is concentric with the nozzle.
Claim 4
Dependent Claim
18 words
A fluid atomizer according to claim 1 in which the orifice is defined in part by the stem.
Claim 5
Dependent Claim
19 words
A fluid atomizer according to claim 1 in which the stem serves to connect the resonator and the body.
Claim 6
Dependent Claim
19 words
A fluid atomizer according to claim 1 having a circumferential knife edge formed at the mouth of the resonator.
Claim 7
Dependent Claim
18 words
A fluid atomizer according to claim 5 in which the knife edge is defined by an internal chamfer.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |