Device for detecting a decrease in hydrogen pressure in an air-b

Details Device for detecting a decrease in hydrogen pressure in an air-b Device for detecting a decrease in hydrogen pressure in an air-b

Filed on

1997-11-12

Date issued

1999-11-09

Examiner

Williams, Hezron

Patent Class

Land vehicles

SubClass

Wheeled

SubSubClass

Attachment

Other Related Categories

280741, 340436, 340438, B62K 100, B60Q 100

Type

Patent

Status

active

Patent number

059799340

Description

ABSTRACT:
An apparatus (2) comprises an inflatable vehicle occupant restraint (4) for, when inflated, helping to protect a vehicle occupant. An inflator (10) is provided having a housing (12) defining a chamber (30). A mixture of gases (32) is stored in the chamber for inflating the vehicle occupant restraint (4). A diode (60) is supported by the housing (12) and is exposed to the stored mixture of gases (32) in the chamber (30). An electrical property of the diode (60) is dependent upon the concentration of at least one of the gases in the mixture of gases (32) in the chamber (30). In a preferred embodiment, sensor means (70) is provided for sensing the electrical property of the diode (60). The sensor means (70) provides an output signal when the electrical property of the diode reaches a predetermined threshold indicating a reduction in the concentration of the one gas in the mixture of gases (32). Means responsive to the output signal (74) is provided for affecting vehicle occupant safety.

REFERENCES:
patent: 5263740 (1993-11-01), Frey et al.
patent: 5351527 (1994-10-01), Blackburn et al.
patent: 5375456 (1994-12-01), Burns
patent: 5428988 (1995-07-01), Starkovich
patent: 5466313 (1995-11-01), Brede et al.
patent: 5520753 (1996-05-01), Hunter
patent: 5551723 (1996-09-01), Mahon et al.
patent: 5591900 (1997-01-01), Bronowocki et al.
patent: 5668301 (1997-09-01), Hunter
Article entitled "Automated Hydrogen Gas Leak Detection System" (NASA Lewis Research), Apr. 16, 1996.
Article entitled "Chemical Species Gas Sensors Team Home Page", (NASA Lewis Research).

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