PYROTECHNIC ACTUATOR AND METHOD OF ACTUATING A PYROTECHNIC ACTUATOR
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United States of America Patent
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Issued Date -
Sep 20, 2012
app pub date -
Mar 15, 2011
filing date -
Mar 15, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A pyrotechnic actuator and a method of actuating the same are described. The actuator comprises a pressure chamber and a piston having such an outer diameter that it is snugly fitted into the pressure chamber. A gas generating ignition and output charge generates gas that pressurizes the pressure chamber and the piston when ignited. The piston is designed such that at least part of its outer diameter expands under the pressure in the pressure chamber such that at least a part of the external piston surface is forced into a press fit against the internal wall of the pressure chamber and therefore seals the pressure chamber. This prevents exhaust gas and flames from escaping from the device in an uncontrolled manner.
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