Patent US3882673A successfully refreshed from Google Patents.
US3882673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of using liquid oxidants to obtain purified gases from solid propellants
Assignee: Societe Nationale des Poudres et Explosifs
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Filing: 1971-12-06
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Granted: 1975-05-13
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Expires: 1991-12-06
Abstract
Abstract This invention relates to a method of obtaining the release of a large amount of epurated gas at a moderate temperature in an extremely short time whereby, for example, a safety cushion or bag for automobile vehicles may be very quickly filled, e.g. to protect passengers in the event of a collision. A solid propellant is burned and the gases resulting from its combustion is placed in contact with a vaporisable cooling liquid. This liquid is an oxidizing compound so as simultaneously to cause epuration of the combustion gases by oxidation of the noxious ingredients in these gases into non-harmful products and also cooling of these gases by mixing them with the said liquid and vaporisation of the latter. The invention also provided a gas generator for carrying out this method.
Inventors
- 👤 Bernard Doin
- 👤 Bernard Plantif
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:01
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B60R21/26; B60R21/264; B01; B01J; B01J7/00; B63; B63C; B63C9/00; B63C9/08; B63C9/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
A METHOD OF OBTAINING THE RELEASE OF A LARGE AMOUNT OF PURIFIED GASES AT A MODERATE TEMPERATURE IN AN EXTREMELY SHORT TIME, WHEREIN A SOLID PROPELLANT IS BURNED AND THE GASES REUSLTING FROM THIS COMBUSTION ARE PLACED IN CONTACT WITH A VAPORISALBE COOLING LIQUID, SAID LIQUID BEING AN OXIDIZING COMPOUND WHICH IS AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE, POTASSIUM PERMANGANATE OR POTASSIUM NITRATE SO AS SIMULTANEOUSLY TO OXIDIZE AT LEAST A SUBSTANTIAL PROPORTION TOXIC SUBSTANCES PRESENT IN THE COMBUSTION GASES AND CAUSE PURIFICATION OF THE SAID COMBUSTION GASES BY OXIDATION OF THE NOXIOUS INGREDIENTS IN THESE GASES INTO NON-HARMFUL PRODUCTS AT HIGH TEMPERATURE AND PRESSURE, AND COOLING OF THESE GASES BY MIXING WITH THE SAID LIQUID AND VAPORISATION OF THE LATTER.
Claim 2
Independent Claim
121 words
A METHOD OF OBTAINING THE RELEASE OF A LARGE AMOUNT OF PURIFIED GASES AT A MODERATE TEMPERATURE IN AN EXTREMELY SHORT TIME, WHEREIN A SOLID PROPELLANT IS BURNED AND THE GASES REUSLTING FROM THIS COMBUSTION ARE PLACED IN CONTACT WITH A VAPORISALBE COOLING LIQUID, SAID LIQUID BEING AN OXIDIZING COMPOUND WHICH IS AN AQUEOUS SOLUTION OF HYDROGEN PEROXIDE, POTASSIUM PERMANGANATE OR POTASSIUM NITRATE SO AS SIMULTANEOUSLY TO OXIDIZE AT LEAST A SUBSTANTIAL PROPORTION TOXIC SUBSTANCES PRESENT IN THE COMBUSTION GASES AND CAUSE PURIFICATION OF THE SAID COMBUSTION GASES BY OXIDATION OF THE NOXIOUS INGREDIENTS IN THESE GASES INTO NON-HARMFUL PRODUCTS AT HIGH TEMPERATURE AND PRESSURE, AND COOLING OF THESE GASES BY MIXING WITH THE SAID LIQUID AND VAPORISATION OF THE LATTER.
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein said oxidizing compound is in solution in a Vaporisable solvent.
Claim 4
Dependent Claim
71 words
A method according to claim 1, wherein all the combustion gases of the propellant are placed in contact with part of the vaporisable oxidizing liquid in order to cause oxidation of the greater part of the noxious ingredients of said gases, then the gases, thus partially purified, are placed in contact with the remainder of the vaporisable oxidizing liquid in order to obtain cooling of said gases and complete their epuration.
Claim 5
Dependent Claim
69 words
A method according to claim 1, wherein said solid propellant is a powder selected from the group comprising double base powders in the form of hollow strands, ''''corrugated cardboard'''' type powders, ''''lamellar'''' type powders, and composite powders having short combustion time, the potential of said powders being greater than 500 calories per gramme and the characteristics of said powders varying very slightly in dependance upon the initial ignition temperature.
Claim 6
Dependent Claim
85 words
A method according to claim 1 wherein a solid propellant is burned to produce a large volume of combustion gases at a high temperature and pressure, and said gases are placed in contact at said high temperature and pressure with at least part of said oxidizing compound in order to cause oxidation of the noxious ingredients of said gases, then the gases thus purified are expanded and placed in contact with the remainder of the oxidizing compound in order to obtain cooling of said gases.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |