Land vehicles – Wheeled – Attachment
Reexamination Certificate
2005-01-11
2005-01-11
Dunn, David R. (Department: 3616)
Land vehicles
Wheeled
Attachment
C280S743200
Reexamination Certificate
active
06840539
ABSTRACT:
A cartridge stores a quantity of string, one end of which is attached to the inside surface of an airbag cushion. A spool which transitions to a cone is situated within the cartridge. A narrow gap around the spool forms a string storage space and a similar gap overlies the cone and leads to an outlet. Positioned within the body of the cartridge is a light source and a light detector. As string is drawn out of the cartridge, the string traverses between the light sources and a light detector generating a signal directly proportional to the rate at which string is withdrawn. The geometry of the cartridge is arranged to provide friction against the string. The friction is created between the string and the junction between the cylindrical spool and the cone and rapidly overcomes the momentum of the string when the airbag cushion comes to a stop.
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Pending unpublished U.S. Appl. No. 10/321,524 filed Dec. 18, 2002 by Husby et al. for Airbag deployment velocity sensor.
Pending unpublished U.S. Appl. No. 10/359,257 filed Feb. 6, 2003 by Husby for Airbag deployment rate sensor with spool brake.
Drayer Lonnie
Dunn David R.
Key Safety Systems, Inc.
Sliteris Joselynn Y.
Stiennon Patrick
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