Overpressure limiting hybrid inflator

Details Overpressure limiting hybrid inflator Overpressure limiting hybrid inflator

2006-04-25

2006-04-25

Nicolas, Frederick C. (Department: 3754)

Dispensing

Gas or vapor dispensing

C222S005000, C222S001000, C280S736000, C280S737000, C280S741000, C137S068130

Reexamination Certificate

active

07032778

ABSTRACT:
A dual stage hybrid inflation device includes a first stage gas source having a pressurized gas stored in a first stage pressure vessel and a second stage gas source having a pyrotechnic gas generator having a gas output directed into the first stage pressure vessel. The first stage pressure vessel is in fluid communication with an inflatable device such as an aircraft emergency evacuation slide via an externally actuated valve upstream of a pressure actuated valve such as a rupturable diaphragm. A control circuit provides a signal to the externally actuated valve to begin a flow of gases from first stage pressure vessel to a chamber on the upstream side of the burst diaphragm. The control circuit also sends a signal to the squib that initiates the pyrotechnic second stage gas source. As the pyrotechnic gas generator of the second stage gas source burns, the hot gaseous products of the second stage gas source mix with the pressurized gas stored in the first stage pressure vessel a predetermined time after the externally actuated valve opens.

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