Patent US3601199A successfully refreshed from Google Patents.
US3601199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for producing extinguishing foam
Assignee: Individual
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Filing: 1969-05-01
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Granted: 1971-08-24
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Expires: 1989-05-01
Abstract
Abstract The present invention is concerned with a method of producing a jet of extinguishing foam containing air, comprising producing a first jet of foam exhibiting more expansion above a more dense and more liquid second jet, the second jet forming a carrier vehicle for the first jet.
Inventors
- 👤 Georges Rotvand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:34
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/311; B01F25/3111; B01F25/312; B01F25/3123; B01F25/31232; B01F25/3124; B01F25/31242
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
21 words
The method according to claim 1 in which the first upper jet is in direct contact with the lower second jet.
Claim 2
Independent Claim
61 words
A method of producing a jet of extinguishing foam containing air, comprising producing a first foam jet exhibiting more expansion above a more dense and more liquid second foam jet, the second jet forming a carrier vehicle for the first jet, and wherein the first jet is propelled indirectly by the second jet by a layer of air which separates them.
Claim 3
Independent Claim
71 words
A method of producing a jet of extinguishing foam containing air, comprising producing a first foam jet exhibiting more expansion above a more dense and more liquid second foam jet, the second jet forming a carrier vehicle for the first jet, and wherein the expansion of the first jet is of the order of 6 to 7, while that of the second jet is of the order of 4 to 5.
Claim 4
Independent Claim
63 words
An apparatus for producing an extinguishing air foam comprising at least two tubes arranged one above the other, and means for producing by the upper tube a first jet of air foam having a first degree of expansion and for producing by the lower tube a second jet of air foam having a lower degree of expansion than said first jet of air.
Claim 5
Dependent Claim
32 words
Apparatus according to claim 5 wherein said two tubes comprise two identical foam-forming tubes and two different sources of foaming liquids fed to said tubes respectively to produce different degrees of expansion.
Claim 6
Dependent Claim
43 words
Apparatus according to claim 5 wherein the upper tube is longer than the lower tube whereby a foam of higher degree of expansion is produced in the upper tube and a foaM of lower degree of expansion is produced in the lower tube.
Claim 7
Dependent Claim
85 words
Apparatus according to claim 5 wherein said tubes have nozzles for injecting the foaming liquid thereinto accommodating in a cylindrical member provided with air suction orifices, the nozzle of the upper tube has a convergent portion over a major part of its length, followed by a short divergent portion, while the nozzle of the lower tube has a convergent portion over a shorter length than the nozzle of the upper tube, a cylindrical portion extending over its remaining length and followed by a cavitation chamber.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |