US3784111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam producing nozzle
Assignee: Spraying Systems Co
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Filing: 1972-03-29
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Granted: 1974-01-08
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Expires: 1992-03-29
Abstract
Abstract A foam producing nozzle of the type using an air and fluid mixing chamber for discharging a foaming stream from the nozzle. A pair of spaced orifice plates are between the nozzle inlet and the mixing chamber and arranged to enhance the foam producing effect.
Inventors
- 👤 R Piggott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:22
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/16; B64D1/18; B05; B05B; B05B7/00; B05B7/0018; B05B7/005; B05B7/0056; B05B7/0062
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
195 words
In a foam producing nozzle of the type defined by a nozzle body having an air and liquid mixing chamber defined in the body between an inlet end and an outlet end, and having air inlet apertures in the body leading to said chamber to induce the flow of air to said chamber under influence of a fluid stream passing through said chamber, the improvement comprising a pair of spaced orifice plates positioned in a passage in said body leading to said chamber, each of said orifice plates having orifices axially aligned with said chamber and the outlet from said chamber, one of said plates defining a side of said chamber opposite to the outlet side thereof and the other of said plates being positioned in spaced relation to said one plate and between said one plate and the inlet side of said body, said plates defining therebetween an expansion chamber having a diameter substantially greater than the diameter of said orifices, the orifice in said one plate being smaller than the orifice in said other plate, said chamber defined between said plates being closed to the exterior except for the orifices in said plates.
Claim 2
Dependent Claim
195 words
In a foam producing nozzle of the type defined by a nozzle body having an air and liquid mixing chamber defined in the body between an inlet end and an outlet end, and having air inlet apertures in the body leading to said chamber to induce the flow of air to said chamber under influence of a fluid stream passing through said chamber, the improvement comprising a pair of spaced orifice plates positioned in a passage in said body leading to said chamber, each of said orifice plates having orifices axially aligned with said chamber and the outlet from said chamber, one of said plates defining a side of said chamber opposite to the outlet side thereof and the other of said plates being positioned in spaced relation to said one plate and between said one plate and the inlet side of said body, said plates defining therebetween an expansion chamber having a diameter substantially greater than the diameter of said orifices, the orifice in said one plate being smaller than the orifice in said other plate, said chamber defined between said plates being closed to the exterior except for the orifices in said plates.
Claim 3
Dependent Claim
79 words
A nozzle as set forth in claim 1 wherein said first plate is defined as a wall of a cup-shaped element positioned within said nozzle body and said second plate is seated against the end of said cup-shaped body remote from said one plate, said cup-shaped element and second plate being held within a bore of said body and against a shoulder therein by a retainer in screw threaded relation to said body and bearing against said second plate.
Claim 4
Dependent Claim
21 words
The structure of claim 2 wherein said second plate includes a portion of reduced diameter fitting snugly within said cup-shaped element.
Claim 5
Dependent Claim
50 words
The structure of claim 3 wherein said chamber includes a screen remote from said first plate and on the side of said chamber opening to said discharge passage, said nozzle body being shaped, between said screen and the discharge end thereof, to provide a flat, fan-shaped spray from the nozzle.
Claim 6
Dependent Claim
82 words
The structure of claim 3 wherein said nozzle body is shaped to provide a discharge passage of smaller diameter than said mixing chamber, said discharge passage including an intermediate portion of a reduced diameter to define an orifice, said nozzle body including a tapered passage having a gradually reducing diameter from said mixing chamber to said orifice diameter, said discharge passage having a substantially uniform diameter from said intermediate portion to the outlet end thereof to provide a relatively solid discharge stream.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |