Inflator, inflation fluid heater and assembly methods

Land vehicles – Wheeled – Attachment

Patent

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Details

280741, 280737, 222 3, B60R 2126

Patent

active

056013086

ABSTRACT:
An apparatus for inflating an air bag comprises a housing (62, 82) defining a substantially toroidal chamber (102, 104) for inflation fluid. The housing (62, 82) includes a first housing portion (66, 85) and a second housing portion (64, 84) fixed to at least one of a pair of annular surfaces of the first housing portion (66, 85). A flow passage (146, 446) extends through the second housing portion (64, 84) to permit the flow of inflation fluid from the toroidal chamber (102, 104) to an air bag located outside the housing (62, 82). A closure member (202, 502) is fixed to the second housing portion (64, 84) for blocking inflation fluid flow from the toroidal chamber (102, 104) to the flow passage (146, 446) when unruptured. A casing (222, 522) has a base section (240, 540) fixed to the second housing portion (64, 84) and a movable section (262, 562) connected to the base section. The casing (222, 522) supports an initiator (244, 544) that generates an initiating gas upon actuation. The movable section (262, 562) separates from the base section (240, 540) in response to actuation of the initiator (244, 544) and effects the rupture of the closure member (202, 502). An ignitable material (224, 524) is located in the casing (222, 522) to produce combustion products, upon being ignited by the initiating gas, to heat and pressurize the inflation fluid. A stop (322, 622) moves with the movable section (262, 562) of the casing (222, 522) to limit movement of the movable section relative to the second housing portion (64, 84) and define a flow path (324, 624) for inflation fluid to flow through from the toroidal chamber (102, 104) to the flow passage (146, 446).

REFERENCES:
patent: 3966226 (1976-06-01), Roth
patent: 5184846 (1993-02-01), Goetz
patent: 5226668 (1993-07-01), Delonge-Immik et al.
patent: 5259644 (1993-11-01), Albrecht et al.
patent: 5273312 (1993-12-01), Coultas et al.
patent: 5437472 (1995-08-01), Kuretake et al.
patent: 5466420 (1995-11-01), Parker et al.

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