Patent US3799324A successfully refreshed from Google Patents.
Patent US3602312A successfully refreshed from Google Patents.
US3602312A
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US
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Process for quenching flames and extinguishing fires and devices therefor
Assignee: Montedison SpA
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Filing: 1969-07-14
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Granted: 1971-08-31
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Expires: 1989-07-14
Abstract
Abstract A process for quenching flames which involves directing thereat symmetrical dibromotetrafluoroethane (BrF2C-CF2Br, 1,1,2,2tetrafluoro-1,2-dibromoethane) through a nozzle having a chamber traversed by this compound prior to emission from the orifice thereof which frustoconically converges in the direction of the orifice with half angle (conicity angle) of the cone ranging from 4* to about 20*, preferably between 5* and 18*. Preferably the outlet orifice at the exit of the chamber is elliptical with a ratio between the major half axis and the minor half axis between 5 and 1, preferably between 2.5 and 1.25, while the inlet orifice is circular and the transition from inlet orifice to outlet orifice is continuous. The dibromotetrafluoroethane is projected as a jet from this chamber at a pressure between 4 and 20 atm.
Inventors
- 👤 Nicolino Rainaldi
- 👤 Pierluigi Fatutto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:19
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/009
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
18 words
The method defined in claim 1 wherein said chamber has a conicity angle of substantially 5* to 18*.
Claim 2
Dependent Claim
27 words
The method defined in claim 1 wherein said orifice is of circular configuration and said chamber has the configuration of a frustum of a right circular cone.
Claim 3
Dependent Claim
43 words
The method defined in claim 1 wherein said discharge orifice is of elliptical configuration, said chamber having an inlet orifice of circular configuration spaced from said outlet orifice and forming a smooth transition between the circular inlet orifice and the elliptical discharge orifice.
Claim 4
Dependent Claim
28 words
The method defined in claim 4 wherein said discharge orifice has a major half axis and a minor half axis in a ratio of substantially 5:1 to 1:1.
Claim 5
Dependent Claim
14 words
The method defined in claim 5 wherein said ratio ranges between 2.5:1 to 1.25:1.
Claim 6
Dependent Claim
32 words
The method defined in claim 5 wherein said chamber has an angle of major conicity and an angle of minor conicity different from one another and each ranging between 4* and 20*.
Claim 7
Dependent Claim
23 words
The method defined in claim 1 wherein the dibromotetrafluoroethane is forced through said chamber at a pressure of substantially 4 to 20 atm.
Claim 8
Dependent Claim
14 words
The method defined in claim 8 wherein said pressure is 6 to 16 atm.
Claim 9
Dependent Claim
41 words
The method defined in claim 1, further comprising the step of driving said dibromotetrafluoroethane through said chamber with a propellant insoluble in said dibromotetrafluoroethane and selected from the group which consists of nitrogen helium, another inert gas and air under pressure.
Claim 10
Dependent Claim
26 words
The method defined in claim 1 further comprising the step of displacing saId said dibromotetrafluoroethane through said chamber with a propellant partially soluble in the dibromotetrafluoroethane.
Claim 11
Dependent Claim
12 words
The method defined in claim 11 wherein said propellant is carbon dioxide.
Claim 12
Dependent Claim
35 words
The method defined in claim 1 wherein said dibromotetrafluoroethane is driven through said chamber with at least one propellant soluble in said dibromotetrafluoroethane and selected from the group consisting of fluorinated, chlorofluorinated and bromofluorinated methanes.
Claim 13
Independent Claim
59 words
An apparatus for quenching flames and extinguishing fires comprising a reservoir if dibromotetrafluoroethane and a nozzle for dispensing dibromotetrafluoroethane connected to said reservoir, said nozzle having a nozzle body formed with a discharge orifice and a chamber leading to said discharge orifice and frustoconically converging in the direction thereof with a conicity angle of about 4* to about 20*.
Claim 14
Dependent Claim
28 words
The apparatus defined in claim 14 wherein said discharge orifice is of circular Configuration and said chamber has the configuration of a frustum of a right circular cone.
Claim 15
Dependent Claim
31 words
The apparatus defined in claim 14 wherein said discharge orifice is of elliptical configuration with a ratio of its major half axis to its minor half axis between 5:1 and 1:1.
Claim 16
Dependent Claim
17 words
The apparatus defined in claim 14, further comprising pump means for displacing said dibromotetrafluoroethane through said nozzle.
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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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |