US3879504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for injection molding of explosive and pyrotechnic material
Assignee: United States Department of the Navy
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Filing: 1973-11-12
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Granted: 1975-04-22
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Expires: 1993-11-12
Abstract
Abstract A method and apparatus for manufacture of explosive and pyrotechnic articles in which explosive and pyrotechnic materials are injection molded into small cavities of long length. The explosives and pyrotechnics are made up of very fine powders mixed together with an elastomer or oil. In some cases a catalyst or polymerizing agent is used.
Inventors
- 👤 Jack Sherman
- 👤 Ronald R Vigneault
- 👤 David A Colpitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:49
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0058; B; B29; B29C; B29C45/00; B29C45/0001; B29K; B29K2083/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
THE METHOD OF MANUFACTURING EXPLOSIVE TRANSFER TRAINS INCLUDING THE STEPS OF: COMMINUTING AN EXPLOSIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF RDX, PETN, AND LEAD AZIDE TO FORM PARTICLES HAVING LARGEST DIAMETERS OF 50 MICRONS OR LESS; MIXING SAID COMMINUTED MATERIAL WITH A FLUID SELECTED FROM THE GROUP CONSISTING OF AN UNCURED SILICONE RUBBER, AND AN OILY COPOLYMER OF TRIFLUOROCHLOROETHYLENE; AND INJECTING THE RESULTING MIXTURE INTO ELONGATED TUBES BY APPLICATION OF PRESSURE.
Claim 2
Independent Claim
72 words
THE METHOD OF MANUFACTURING EXPLOSIVE TRANSFER TRAINS INCLUDING THE STEPS OF: COMMINUTING AN EXPLOSIVE MATERIAL SELECTED FROM THE GROUP CONSISTING OF RDX, PETN, AND LEAD AZIDE TO FORM PARTICLES HAVING LARGEST DIAMETERS OF 50 MICRONS OR LESS; MIXING SAID COMMINUTED MATERIAL WITH A FLUID SELECTED FROM THE GROUP CONSISTING OF AN UNCURED SILICONE RUBBER, AND AN OILY COPOLYMER OF TRIFLUOROCHLOROETHYLENE; AND INJECTING THE RESULTING MIXTURE INTO ELONGATED TUBES BY APPLICATION OF PRESSURE.
Claim 3
Independent Claim
72 words
The method of manufacturing explosive transfer trains including the steps of: comminuting an explosive material selected from the group consisting of RDX, PETN, and lead azide to form particles having largest diameters of 50 microns or less; mixing said comminuted material with a fluid selected from the group consisting of an uncured silicone rubber, and an oily copolymer of trifluorochloroethylene; and injecting the resulting mixture into elongated tubes by application of pressure.
Claim 4
Independent Claim
72 words
The method of manufacturing explosive transfer trains including the steps of: comminuting an explosive material selected from the group consisting of RDX, PETN, and lead azide to form particles having largest diameters of 50 microns or less; mixing said comminuted material with a fluid selected from the group consisting of an uncured silicone rubber, and an oily copolymer of trifluorochloroethylene; and injecting the resulting mixture into elongated tubes by application of pressure.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein the fluid selected is a polymerizable silicone rubber and wherein a polymerizing agent is added before mixing.
Claim 6
Dependent Claim
12 words
The method of claim 1 including curing of said explosive after injection.
References Cited (Backward Citations)
US3384688A
Cited
US3466204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |