US3665857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base ejecting ordnance projectile
Assignee: United States Department of the Army
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Filing: 1970-11-23
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Granted: 1972-05-30
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Expires: 1990-11-23
Abstract
Abstract This disclosure is directed to a safety lifting plug for a base ejecting projectile which includes a cavity-defining body and at least one opening in the body for receiving the plug. The safety lifting plug is disclosed as including a top, a base means depending from the top which is receivable and rigidly engageable within the one opening, a lifting bar secured to the top, passage means formed in the plug through the top and the base means, and sealing means disposed in the passage means, which sealing means is manufactured from a material the melting point of which is less than the ''''expelling charge reaction temperature'''' of expelling charge material to be carried by the projectile. Thus, where a projectile is provided with a safety lifting plug according to the invention, the experience of high environmental temperatures thereby, which temperatures are in excess of the ''''expelling charge reaction temperature'''' thereby creating a possibility of a catastrophic event, causes the sealing material of the safety plug to melt thereby communicating the interior of the projectile with the atmosphere so as to allow the expelling charge gases to escape thereby to preclude the generation of undesired pressures within the projectile.
Inventors
- 👤 Spencer I Radnich
- 👤 Samuel Davelman
- 👤 Paul S Symonds
- 👤 Willis H Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:24
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/04; F42B; F42B39/00; F42B39/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
154 words
A base-ejecting ordnance projectile comprising: a casing; a cavity defined by said casing, said cavity including a payload chamber and an expelling charge chamber separated by a payload pusher plate; an opening in said casing for communicating said expelling charge chamber with the exterior of said casing; and a safety lifting plug disposed in said opening in said casing, said safety lifting plug comprising a top, a base means depending from said top, said base means being receivable within said opening for rigid engagement with said casing, lifting means secured to said top for attaching said plug to an article handling apparatus, passage means formed in said plug through said top and said base means, and sealing means disposed in said passage means, said sealing means being manufactured of a material the melting point of which is a lower temperature than the cargo reaction temperature of cargo material to be received in said container.
Claim 2
Dependent Claim
154 words
A base-ejecting ordnance projectile comprising: a casing; a cavity defined by said casing, said cavity including a payload chamber and an expelling charge chamber separated by a payload pusher plate; an opening in said casing for communicating said expelling charge chamber with the exterior of said casing; and a safety lifting plug disposed in said opening in said casing, said safety lifting plug comprising a top, a base means depending from said top, said base means being receivable within said opening for rigid engagement with said casing, lifting means secured to said top for attaching said plug to an article handling apparatus, passage means formed in said plug through said top and said base means, and sealing means disposed in said passage means, said sealing means being manufactured of a material the melting point of which is a lower temperature than the cargo reaction temperature of cargo material to be received in said container.
Claim 3
Dependent Claim
23 words
A base-ejecting projectile according to claim 1 wherein said top and said securing member of said safety lifting plug are a monolithic structure.
Claim 4
Dependent Claim
30 words
A base-ejecting projectile according to claim 1 and further including a counter-bore in said securing member of said safety lifting plug, said counter-bore being in communication with said passage means.
Claim 5
Dependent Claim
26 words
A base-ejecting projectile according to claim 1 wherein said lifting means of said safety lifting plug comprises a generally U-shaped bar rigidly secured to said top.
Claim 6
Dependent Claim
26 words
A base-ejecting projectile according to claim 4 wherein said base means, said top and said U-shaped bar of said safety lifting plug are a monolithic structure.
Claim 7
Dependent Claim
25 words
A base-ejecting projectile according to claim 1 wherein said lifting means of said safety lifting plug comprises an eye bar rigidly secured to said top.
Claim 8
Dependent Claim
26 words
A base-ejecting projectile according to claim 6 wherein said base means, said top and said eye bar of said safety lifting plug are a monolithic structure.
Claim 9
Dependent Claim
39 words
A base-ejecting ordnance projectile according to claim 1 and further including filler means disposed over said sealing means of said safety lifting plug, said filler means for filling any interstices in said passage in and around said sealing means.
Claim 10
Dependent Claim
40 words
A base-ejecting ordnance projectile according to claim 6 wherein said passage means of said safety lifting plug comprises a plurality of bores extending from said top adjacent the base of said eye bar through said top and said base means.
Claim 11
Dependent Claim
33 words
A base-ejecting ordnance projectile according to claim 1 wherein said sealing means of said safety lifting plug is a metal alloy consisting of 52.5 percent bismuth, 32 percent lead and 15.5 percent tin.
Claim 12
Dependent Claim
46 words
A base-ejecting ordnance projectile according to claim 1 wherein said sealing means of said safety lifting plug comprises ternary eutectic compositions of bismuth, lead and either cadmium or tin in such proportions as to obtain a melting point in the range of 185* to 215* F.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |