GAS GENERATOR HAVING COMBUSTION CHAMBER INCLUDING CUSHION MEMBER

• US 20110241324A1
• Filed: 03/29/2011
• Published: 10/06/2011
• Est. Priority Date: 03/30/2010
• Status: Active Grant

• Current Assignee: Daicel Chemical Industries Limited
• Original Assignee: Daicel Chemical Industries Limited
• Inventors: Kinoshita, Gen, Nakayasu, Masayuki
• Granted Patent: US 8,590,929 B2
• Time in Patent Office: Days
• US Class Current: 280/736
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder
• CPC Class Codes: F42B 3/04 for producing gas under pressure generators of inflation fluid especially adapted for vehicle air bags B60R21/26

Abstract

The present invention provides a gas generator for a restraining apparatus of a vehicle, including a combustion chamber, a tabular cushion member being disposed on a bottom portion of the combustion chamber, the solid gas generating agent as a gas generating source, being charged in the combustion chamber inside the gas generator together with the cushion member, the combustion chamber being substantially in a cup shape in which an inner diameter (D₁) of an opening is smaller than an inner diameter (D₂) of the bottom portion, the cushion member including a circular portion serving as a base part and a plurality of protrusions protruding from a peripheral edge of the circular portion, an outer diameter (d₁) of the circular portion and the inner diameter (D₁) of the opening satisfying a relationship of d₁<D₁, and an outer diameter (d₂) including the protrusions satisfying relationships of d₂>D₁ and d₂≦D₂.

Claims

1. A gas generator for a restraining apparatus of a vehicle, comprising:

a combustion chamber,

a tabular cushion member being disposed on a bottom portion of the combustion chamber,

a solid gas generating agent as a gas generating source, being charged in the combustion chamber inside the gas generator together with the cushion member,

the combustion chamber being substantially in a cup shape in which an inner diameter (D1) of an opening is smaller than an inner diameter (D2) of the bottom portion,

the cushion member including a circular portion serving as a base part and a plurality of protrusions protruding from a peripheral edge of the circular portion,

an outer diameter (d1) of the circular portion and the inner diameter (D1) of the opening satisfying a relationship of d1<

D1, and

an outer diameter (d2) including the protrusions satisfying relationships of d2>

D1 and d2≦

D2.

2. A gas generator according to claim 1,

wherein the cushion member is a regular polygon, and a maximum distance between opposing sides is the d1, and a distance between two opposing apexes is the d2.

3. A gas generator according to claim 1,

wherein the cushion member is a regular polygon,

all sides of the regular polygon are formed of curved lines curved inward, and

a distance between intermediate points of opposing sides is the d1, and a distance between two opposing apexes is the d2.

4. A gas generator according to claim 1,

wherein a width of a concave portion formed by a difference between the inner diameter (D2) of a bottom surface portion and the outer diameter (d1) of the circular portion corresponds to a gap which the solid gas generating does not enter.

5. A gas generator according to claim 2,

wherein a width of a concave portion formed by a difference between the inner diameter (D2) of a bottom surface portion and the outer diameter (d1) of the circular portion corresponds to a gap which the solid gas generating does not enter.

6. A gas generator according to claim 3,

wherein a width of a concave portion formed by a difference between the inner diameter (D2) of a bottom surface portion and the outer diameter (d1) of the circular portion corresponds to a gap which the solid gas generating does not enter.