Ammunition and explosives – Igniting devices and systems
Reexamination Certificate
2005-03-01
2005-03-01
Carone, Michael J. (Department: 3641)
Ammunition and explosives
Igniting devices and systems
C102S530000, C102S531000, C280S735000, C280S742000
Reexamination Certificate
active
06860205
ABSTRACT:
A dual stage hybrid inflation device includes a pressure switch that prevents the second stage pyrotechnic gas generator from being initiated when the additional heat and gas would overpressurize the first stage pressure vessel. As the pressurized gas stored in the first stage pressure vessel escapes the first stage pressure vessel, the pressure in the first stage pressure vessel drops. If the pressure in the first stage pressure vessel drops below the threshold pressure of the pressure switch, the pressure switch closes allowing the voltage signal to reach the pyrotechnic gas generator thereby initiating the second stage gas source. In an alternative embodiment, the pressure transducer is replaced by a pressure transducer or a temperature transducer and timing circuit. By delaying the initiation of the second stage gas source until after the pressure in the first stage pressure vessel has dropped below the threshold level, the appropriate augmentation of the compressed first stage gas can be realized without the necessity of designing the first stage pressure vessel to withstand initiation of the pyrotechnic gas generator under maximum inflation pressure conditions.
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Baker James J.
Eskildsen Jim
Carone Michael J.
Holden Jerry
Semunegus L.
Titus John D.
Universal Propulsion Company
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