| US 7,600,781 B2 | ||
| Inflator | ||
| Haruhiko Yamashita, Tatsuno (Japan); Shinichiro Ukita, Tatsuno (Japan); Atsushi Hatomoto, Tatsuno (Japan); and Akihisa Ogawa, Tatsuno (Japan) | ||
| Assigned to Daicel Chemical Industries, Ltd., Osaka-Shi, Osaka (Japan) | ||
| Filed on Nov. 29, 2007, as Appl. No. 11/947,566. | ||
| Claims priority of provisional application 60/868849, filed on Dec. 06, 2006. | ||
| Claims priority of application No. 2006-325311 (JP), filed on Dec. 01, 2006. | ||
| Prior Publication US 2008/0136153 A1, Jun. 12, 2008 | ||
| Int. Cl. B60R 21/26 (2006.01) | ||
| U.S. Cl. 280—736 | 6 Claims |
| 1. An inflator, comprising:
a pressurized gas chamber whose outer shell is formed by a cylindrical pressurized gas chamber housing, filled with a pressurized
gas;
a gas generator being connected to one end of the pressurized gas chamber, including an ignition device and a molded article
of a gas generating composition, having a circular cross section, in a gas generator housing;
a diffuser portion being connected to the other end of the pressurized gas chamber, provided with a gas discharge port;
a first communication path provided between the pressurized gas chamber and the gas generator and closed by a first rupturable
plate; and
a second communication path provided between the pressurized gas chamber and the diffuser portion and closed by a second rupturable
plate; and
a cap covering the first rupturable plate from a side of the pressurized gas chamber, the cap having a peripheral surface
provided with a plurality of gas holes through which gas passes, and a bottom surface that opposes the first rupturable plate;
and, the cap being disposed to cover the first rupturable plate from the pressurized gas chamber side,
the minimum diameter (d min) of each of the plurality of gas holes being equal to or smaller than the larger one of the minimum
diameter (D min) and the length (L) of the molded article of the gas generating composition, such that half-burned and unburned
gas generating compositions are completely burned inside the cap, stabilizing an output of the inflator.
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