US3836076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam generating nozzle
Assignee: Delavan Manufacturing Co
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Filing: 1972-10-10
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Granted: 1974-09-17
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Expires: 1992-10-10
Abstract
Abstract A nozzle and method for generating a foamed liquid includes a nozzle body, a plurality of spaced orifices forming discrete jets of a liquid foam producing agent in an elongate passage in the nozzle body, and a solid surface defined in the body upon which the jets impinge. Gas inlet openings introduce gas into the passage and the gas and liquid foam producing agent are intimately mixed by deflection of the latter from the solid surface to produce foam in the passage.
Inventors
- 👤 S Conrad
- 👤 D Bintner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:25
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/06; A01G13/065; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/311; B01F25/3111; B05; B05B; B05B1/00; B05B1/02; B05B1/04; B05B1/048; B05B7/00; B05B7/0018; B05B7/005; B05B7/0056; Y; Y10; Y10S; Y10S261/00; Y10S261/26
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
202 words
A foam generating nozzle comprising, a nozzle body having an elongate passage extending through the major part of the length of said body, a liquid inlet at one end of said body for introducing a liquid foam producing agent to said passage, orifice means adjacent said one end of said body, said orifice means having an axis and forming at least one discrete jet of liquid foam producing agent in said passage along said axis when said agent is introduced through said liquid inlet, gas inlet means on said nozzle body between said orifice means and the other end of said body for introducing a gas into said passage, a solid impingement surface in said passage between said orifice means and the other end of said body positioned in the path of said jet on said axis, said surface deflecting said jet which impinges thereon toward the axis of said passage to effect intimate mixing of the liquid foam producing agent and the gas to generate foam in said passage, and foam discharge means adjacent said other end of said body, said passage being of substantially constant cross section over its length between said solid impingement surface and said foam discharge means.
Claim 2
Dependent Claim
202 words
A foam generating nozzle comprising, a nozzle body having an elongate passage extending through the major part of the length of said body, a liquid inlet at one end of said body for introducing a liquid foam producing agent to said passage, orifice means adjacent said one end of said body, said orifice means having an axis and forming at least one discrete jet of liquid foam producing agent in said passage along said axis when said agent is introduced through said liquid inlet, gas inlet means on said nozzle body between said orifice means and the other end of said body for introducing a gas into said passage, a solid impingement surface in said passage between said orifice means and the other end of said body positioned in the path of said jet on said axis, said surface deflecting said jet which impinges thereon toward the axis of said passage to effect intimate mixing of the liquid foam producing agent and the gas to generate foam in said passage, and foam discharge means adjacent said other end of said body, said passage being of substantially constant cross section over its length between said solid impingement surface and said foam discharge means.
Claim 3
Dependent Claim
16 words
The nozzle of claim 1 wherein said passage extends axially between the ends of said body.
Claim 4
Dependent Claim
39 words
The nozzle of claim 1 wherein saeid orifice means comprises a plurality of orifices spaced radially from the axis of said elongate passage, said orifices forming a plurality of fine jets each of which impinge said solid impingement surface.
Claim 5
Dependent Claim
19 words
The nozzle of claim 3 wherein said gas inlet means also comprises a plurality of orifices through said body.
Claim 6
Dependent Claim
50 words
The nozzle of claim 4 wherein said gas inlet orifices are positioned between said plurality of liquid orifices and said solid impingement surface and said liquid foam producing agent orifices are offset from each other such that each of said jets pass between adjacent ones of said gas inlet orifices.
Claim 7
Dependent Claim
37 words
The nozzle of claim 1 wherein said orifices means comprise a plate positioned at said one end of said passage, said plate having a plurality of orifices therein radially spaced from the axis of said elongate passage.
Claim 8
Dependent Claim
23 words
The nozzle of claim 1 wherein said orifice means directs said jet in a path substantially parallel to the axis of said passage.
Claim 9
Dependent Claim
59 words
The nozzle of claim 1 wherein said orifice means and said gas inlet means are positioned relative to each other such that the jet issuing from said orifice means reduces the pressure in said passage adjacent said gas inlet means to a pressure below atmospheric pressure, whereby the gas is aspirated into said passage through said gas inlet means.
Claim 10
Dependent Claim
30 words
The nozzle of claim 1 wherein said solid impingement surface comprises a shoulder defined on said body in said passage, said shoulder being positioned in the path of said jet.
Claim 11
Dependent Claim
10 words
The nozzle of claim 9 wherein said shoulder is annular.
Claim 12
Dependent Claim
26 words
The nozzle of claim 9 wherein said shoulder is sloped toward said foam discharge means whereby said jet is deflected toward the axis of said passage.
Claim 13
Dependent Claim
44 words
The nozzle of claim 9 wherein said passage comprises a first section and a second section axially downstream from said first section, said second section having a cross section smaller than said first section and being separated from said first section by said shoulder.
Claim 14
Dependent Claim
14 words
The nozzle of claim 1 wherein said foam discharge means conprises a slotted opening.
Claim 15
Dependent Claim
22 words
The nozzle of claim 1 wherein said gas inlet means is axially positioned between said orifice means and said solid impingement surface.
Claim 16
Independent Claim
107 words
A method of generating foam comprising the steps of: forming at least one discrete jet of a liquid foam producing agent in a foam generating passage along an axial path, impinging said jet upon a solid surface in said axial path of said jet in said passage, introducing a gas into said passage downstream of the location at which said fine jet is formed, intimately mixing said gas and the liquid foam producing agent deflected from said solid surface together to generate foam in a portion of said passage having substantially constant cross section over its length, and discharging said foam from said portion of said passage.
Claim 17
Independent Claim
107 words
A method of generating foam comprising the steps of: forming at least one discrete jet of a liquid foam producing agent in a foam generating passage along an axial path, impinging said jet upon a solid surface in said axial path of said jet in said passage, introducing a gas into said passage downstream of the location at which said fine jet is formed, intimately mixing said gas and the liquid foam producing agent deflected from said solid surface together to generate foam in a portion of said passage having substantially constant cross section over its length, and discharging said foam from said portion of said passage.
Claim 18
Dependent Claim
45 words
The method of claim 15 including forming a pluraltiy of said jets of said liquid foam producing agent and directing said jets along a path substantially parallel to and radially spaced from the axis of said passage, each of said jets impinging upon said surface.
Claim 19
Dependent Claim
16 words
The method of claim 16 wherein said jets impinge upon an annular surface in said passage.
Claim 20
Dependent Claim
22 words
The method of claim 15 wherein said jet is deflected toward the axis of said passage by impingement upon said solid surface.
Claim 21
Dependent Claim
18 words
The method of claim 15 wherein said gas is introduced into said passage upstream of said solid surface.
Claim 22
Dependent Claim
28 words
The method of claim 15 wherein said solid surface includes a disc in said passage downstream of the location at which said gas is introduced into the passage.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |