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US 3,939,772 AGranted
Blasting caps initiatable by thermal detonation energy of an explosive gas mixture, and blasting system
AssigneeHercules Incorporated
InventorDavid T. Zebree
Life of this patent
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Abstract
A nonelectric blasting cap initiated by thermal detonation energy from an explosive gas mixture, in which the required open space for charging and detonating the explosive gas mixture is contained, together with the conduit means, in an end closure member; and the open space is shaped to provide a shell to end closure crimp without impairing flow of explosive gas through the conduits. A blasting system including a plurality of the above blasting caps is also provided.
Claims10
A nonelectric blasting cap assembly, which comprises,
- a closed shell including an elongated closure member therefor, deformable for crimping described hereinafter, and an initiator charge within said shell ignitable in response to action of thermal detonation energy of an explosive gas mixture;
- said closure member containing an open space substantially coaxial therewith including a cavity disposed intermediate its ends and a perforation extending from said cavity through one end of said closure into open communication with said initiator charge;
- first and second conduits each extending within said closure member from the opposite end thereof in open communication with the outside of said shell and with said cavity, and in water tight relationship with said closure;
- an explosive charge within said shell detonatable in operative response to ignition of said initiator charge;
- and
- crimp means on the exterior of said shell extending through the shell wall around said perforation and then into said end closure member in support of said closure member and said shell in water tight relationship.
3 more elements
Dependencies are inferred from the claim text.