Pyrotechnic/explosive initiator
AssigneeExplosive Technology, Inc.
InventorsFrank B. Burkdoll, Harold W. Hannagan
Life of this patent
Estimating the term…
Abstract
Pyrotechnic/explosive initiator for use with a detonating cord or fuse comprising an elongated hollow tube with a longitudinally extending channel through which a gaseous percussion wave is propagated. The initiator includes a charge of pyrotechnic or explosive material and a valve for cutting off communication between the gas channel and the charge upon initiation of the charge to prevent gases and other reaction products from being exhausted back into the fuse.
Claims15
In a pyrotechnic/explosive initiator:
- a fuse having a longitudinally extending gas channel through which a gaseous percussion wave is transmitted, a charge of pyrotechnic explosive material positioned in communication with the gas channel and adapted to be initiated by the percussion wave, and valve means responsive to gas pressure produced by initiation of the charge for closing off communication between the charge and the gas channel to prevent gas produced by the charge from passing into the channel.
In a pyrotechnic/explosive initiator for use with a fuse having a longitudinally extending gas channel through which a percussion wave is transmitted:
- a body having an inlet port to which the fuse is connected, a chamber within the body in communication with the inlet port, a charge of pyrotechnic/explosive material in the chamber which is initiated by the percussion wave from the fuse, and gas pressure responsive valve means for closing off communication between the inlet port and the chamber upon initiation of the charge.
In an ignitor:
- a fuse comprising an elongated hollow tube with a coating of pyrotechnic material on the inner wall thereof, a generally cylindrical sleeve mounted within the bore of the tube toward the distal end thereof with the outer wall of the sleeve in sealing engagement with the inner wall of the tube, a charge of ignitive material spaced from the sleeve toward the distal end of the tube, and a valve member positioned between the sleeve and the charge and being urged into sealing engagement with the sleeve by gases produced by ignition of the charge.
Dependencies are inferred from the claim text.