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US3709302A
Expired / Lapsed
US
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Self-contained foam fire extinguishing system
Assignee: Individual
•
Filing: 1971-07-08
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Granted: 1973-01-09
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Expires: 1991-07-08
Abstract
Abstract A self-contained high expansion foam fire extinguishing system providing an independent source of pressurization to a container holding a mixture of water and foam concentrate for delivery to a foam generator having a plurality of nozzle members and a stratified screen to produce high expansion foam upon activation of the system by a fire detecting sensor.
Inventors
- 👤 H Stults
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:02
CPC Classifications
A; A62; A62C; A62C35/00; A62C35/02; A62C35/08; A62C5/00; A62C5/02; A62C5/022; A62C31/00; A62C31/02; A62C31/28; A62C99/00; A62C99/009
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
100 words
a multilayer screen horizontally disposed and opposite said nozzles, said foam generator having top, bottom, rear and side enclosures, said bottom enclosure extending from said multilayer screen to a distance substantially in the vicinity of said nozzles and said top enclosure extending from said multilayer screen substantially beyond said nozzles, said rear enclosure depending downwardly from said top enclosure defining an orifice whereby air is drawn into said foam generator through said orifice defined by said enclosures when fluid is caused to be discharged through said nozzles for projection upon said multilayer screen where said high expansion foam is generated.
Claim 2
Dependent Claim
21 words
a plurality of nozzles coupled to Said spaced openings in said manifold, said nozzles adapted to output said foam producing concentrate;
Claim 3
Dependent Claim
39 words
The fire extinguishing system as defined in claim 1 wherein said multilayer screen comprises a first honeycombed layer having a plurality of hexagonal cells disposed therethrough and a second mesh layer in intimate contact with said first honeycombed layer.
Claim 4
Dependent Claim
40 words
a multilayer screen horizontally disposed and being opposite said nozzles, said multilayer screen comprising a first honeycombed layer having a plurality of hexagonal cells disposed therethrough and a second mesh layer in intimate contact with said first honeycombed layer; and
Claim 5
Dependent Claim
31 words
A fire extinguishing system as defined in claim 2 wherein said second mesh layer is plated with an active metal selected from a group consisting of cadmium, zinc, chromium and platinum.
Claim 6
Dependent Claim
53 words
an enclosure having top, bottom, rear and side walls, a portion of said top wall and said bottom wall being coupled to said multilayer screen, said enclosure defining an orifice through said bottom wall whereby the output of foam producing concentrate from said nozzles causes ambient air to be drawn through said orifice.
Claim 7
Dependent Claim
35 words
A fire extinguishing system as defined in claim 1 including a pressurized source of inert gas, said pressurized source being coupled to said reservoir whereby said foam producing fluid is forced out of said nozzles.
Claim 8
Dependent Claim
23 words
A fire extinguishing system as defined in claim 4 wherein said pressurized source is pressurized in the range of 25 to 40 psi.
Claim 9
Dependent Claim
15 words
A fire extinguishing system as defined in claim 4 wherein said inert gas is nitrogen.
Claim 10
Dependent Claim
60 words
A fire extinguishing system of the type using high expansion foam comprising: a. self-contained source means for containing pressurized gas; b. reservoir means coupled to said self-contained source means for containing a pre-mixed high expansion foam producing concentrate; c. foam generating means for drawing air into same and generating foam coupled to said reservoir means, said foam generating means comprising:
Claim 11
Dependent Claim
31 words
A fire extinguishing system as defined in claim 7 wherein said second mesh layer is plated with an active metal selected from a group consisting of cadmium, zinc, chromium and platinum.
Claim 12
Dependent Claim
17 words
A fire extinguishing system as defined in claim 7 wherein said pressurized gas is an inert gas.
Claim 13
Dependent Claim
15 words
A fire extinguishing system as defined in claim 9 wherein said inert gas is nitrogen.
Claim 14
Dependent Claim
24 words
A fire extinguishing system as defined in claim 7 wherein said self-contained source means is pressurized in the range of 25 - 40 psi.
Claim 15
Dependent Claim
169 words
A self-contained fire extinguishing system of the type using high expansion foam comprising: a. a source of pressurized, inert gas; b. at least one reservoir adapted to contain high expansion foam producing fluid, said reservoir coupled to said source of pressurized, inert gas; and c. a foam generator having an enclosure of top, bottom, rear and side walls defining an orifice through said bottom wall, a multilayer screen including a first honey-combed layer and a second plated mesh layer, said multilayer screen being horizontally disposed and secured to portions of said top and bottom walls, a manifold having a plurality of spaced openings therein being disposed within said enclosure and coupled to said reservoir, and a plurality of nozzles each being coupled to one of said spaced openings and being opposite said multilayer screen and adapted to output said foam producing fluid uniformly upon said multilayer screen whereby the output of said foam producing fluid from said plurality of nozzles causes ambient air to be drawn through said orifice.
Claim 16
Dependent Claim
30 words
A fire extinguishing system as defined in claim 12 wherein said mesh layer is plated with an active metal selected from a group consisting of cadmium, zinc, chromium and platinum.
Claim 17
Dependent Claim
15 words
A fire extinguishing system as defined in claim 12 wherein said inert gas is nitrogen.
Claim 18
Dependent Claim
23 words
A fire extinguishing system as defined in claim 12 wherein said inert gas is pressurized in the range of 25 - 40 psi.
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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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |