Patent US3729154A successfully refreshed from Google Patents.
US3729154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device related to the ejection of a person from an aircraft cockpit or the like
Assignee: Dassault Aviation SA
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Filing: 1971-02-17
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Granted: 1973-04-24
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Expires: 1991-02-17
Abstract
Abstract A method and device related to the ejection of a person from an aircraft cockpit or the like, wherein two sets of detonating charges in appropriate spaced relationship act on the confining wall, the first set to cause the commencement of ruptures and the second set, which are fired subsequently, to cause completion of the previously commenced ruptures, thereby to permit ejection of the person through the shattered and fragile wall, while the latter is nevertheless still intact, without danger.
Inventors
- 👤 H Deplante
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:25
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
A method for ejecting a person from a confining space through a frangible confining wall comprising the steps of subjecting said wall to the action of a series of discrete localized explosive charges distributed at spaced intervals in a contour defining an egress opening in said wall, each of said charges having an intensity sufficient to crack the corresponding wall region without perforating the same, and thereafter ejecting said person through said cracked wall while the wall remains effectively intact in its ordinary position.
Claim 2
Independent Claim
84 words
A method for ejecting a person from a confining space through a frangible confining wall comprising the steps of subjecting said wall to the action of a series of discrete localized explosive charges distributed at spaced intervals in a contour defining an egress opening in said wall, each of said charges having an intensity sufficient to crack the corresponding wall region without perforating the same, and thereafter ejecting said person through said cracked wall while the wall remains effectively intact in its ordinary position.
Claim 3
Dependent Claim
57 words
The method of claim 1 wherein said wall is first subjected to a series of said spaced charges of sufficient intensity to initiate said cracking and in closely spaced timed relation is then subjected to at least one other series of said charges arranged generally in alternation to said first series so as to propagate said cracking.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein said second step follows said first after a small predetermined time interval.
Claim 5
Independent Claim
127 words
A device for ejecting a person from a confining space, through a frangible wall, said device comprising a first series of discrete explosive charges acting on the wall and arranged along at spaced intervals a curved outline defining an egress opening and at least one other series of explosive charges located in spaced apart relatiOnship from the first series of charges, the charges of the first series being sufficient to initiate cracking in the confining wall, and the charges of the second series sufficient to propagate the crack lines in order to complete fragmentation, neither series being sufficient to perforate said wall, and means for automatically detonating said two series of charges in close timed succession and means for thereafter ejecting said person through said cracked wall.
Claim 6
Independent Claim
127 words
A device for ejecting a person from a confining space, through a frangible wall, said device comprising a first series of discrete explosive charges acting on the wall and arranged along at spaced intervals a curved outline defining an egress opening and at least one other series of explosive charges located in spaced apart relatiOnship from the first series of charges, the charges of the first series being sufficient to initiate cracking in the confining wall, and the charges of the second series sufficient to propagate the crack lines in order to complete fragmentation, neither series being sufficient to perforate said wall, and means for automatically detonating said two series of charges in close timed succession and means for thereafter ejecting said person through said cracked wall.
Claim 7
Dependent Claim
69 words
A device as in claim 4 wherein said frangible wall is the carapace of the cockpit of an aircraft, said outline of explosive charges follows the edge of the carapace which is in contact with the solid body of the fuselage, and the charges of the second series are placed in alternating relation to the first series of charges not outside the outline of the first series of charges.
Claim 8
Dependent Claim
26 words
A device according to claim 4 wherein said charges are detonated individually by electric circuits by means of a generator producing at least one electric pulse.
Claim 9
Dependent Claim
24 words
A device according to claim 4 wherein detonating of the charges of the two series is controlled by pyrotechnical means from a pyrotechnical starter.
Claim 10
Dependent Claim
23 words
A device according to claim 5 wherein each charge acts on the carapace through a plate of solid material or other intervening member.
Claim 11
Dependent Claim
15 words
A device according to claim 5 wherein said charges are applied flat to the carapace.
Claim 12
Dependent Claim
23 words
A device according to claim 5 wherein said detonating charges are set to act on the carapace at an angle greater than zero.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |