Inflatable knee bolster module assembly

• US 6,305,710 B1
• Filed: 02/24/2000
• Issued: 10/23/2001
• Est. Priority Date: 02/24/2000
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Saderholm, Davin, Bosgieter, Lance M.
• Primary Examiner(s): CULBRETH, ERIC D
• Application Number:
  US09/511,724
• Time in Patent Office: 607 Days
• Field of Search: 280/753, 280/752, 280/751, 280/748, 280/730.1, 280/732, 280/728.3, 280/728.1
• US Class Current: 280/753
• CPC Class Codes: B60R 2021/0051 Knees
• CPC Class Codes: B60R 2021/024 mounted on dash-board
• CPC Class Codes: B60R 2021/2161 the cover being displaced towards the occupant during deployment
• CPC Class Codes: B60R 2021/23169 specially adapted for knee protection
• CPC Class Codes: B60R 21/02 Occupant safety arrangements or fittings , e.g. crash pads seat belts with crash pads B60R22/14; removable children's seats having a front guard or barrier B60N2/2839
• CPC Class Codes: B60R 21/206 in the lower part of dashboards, e.g. for protecting the knees
• CPC Class Codes: B60R 21/216 comprising tether means for limitation of cover motion during deployment
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence

Abstract

Inflatable knee bolster module assemblies are provided wherein a knee bolster panel and an associated reaction plate engage to form a bolster housing containing an inflatable knee cushion and a knee cushion inflator assembly. Upon actuation, the knee cushion inflator assembly provides an inflation fluid effective to inflate the knee cushion and to deploy the knee bolster panel to provide lower torso restraint for an oppositely positioned vehicle occupant while the knee bolster panel remains engaged with the reaction plate.

Claims

1. In an inflatable restraint system for an automotive vehicle and which automotive vehicle includes at least one primary inflatable cushion and a corresponding primary inflator assembly to provide an inflation fluid to inflate the primary inflatable cushion to restrain forward movement of an oppositely positioned vehicle occupant and an inflatable knee bolster module assembly which includes a knee bolster panel, an associated inflatable knee cushion and a corresponding knee cushion inflator assembly distinct from the primary inflator assembly and effective to provide an inflation fluid to inflate the inflatable knee cushion to position the knee bolster panel to provide lower torso restraint for the oppositely positioned vehicle occupant, the improvement of the inflatable knee bolster module assembly comprising:

the knee bolster panel including a generally planar face portion and first and second spaced apart attachment flanges, the first and second attachment flanges each rearwardly extending from the face portion and

a reaction plate including first and second spaced apart attachment extensions corresponding to the first and second spaced apart attachment flanges, respectively, with the knee bolster panel adapted to cooperate with the reaction plate to form a housing for the knee cushion inflator assembly and the inflatable knee cushion in a stored condition and wherein, upon deployment of the inflatable knee cushion, the knee bolster panel face portion is displaced to provide lower torso restraint for the oppositely positioned vehicle occupant while the knee bolster panel remains engaged with the reaction plate.

2. The improved inflatable knee bolster module assembly of claim 1 wherein at least the first attachment flange includes at least one first attachment slot opening and wherein the first attachment extension includes at least one first attachment projection generally corresponding to the at least one first attachment slot opening, wherein the at least one first attachment projection is engageable with the at least one first attachment slot opening.

3. The improved inflatable knee bolster module assembly of claim 2 additionally comprising at least one locking feature adapted to maintain engagement positioning of the at least one first attachment projection with the at least one first attachment slot opening upon deployment of the inflatable knee cushion.

4. The improved inflatable knee bolster module assembly of claim 3 wherein the at least one locking feature comprises at least a pair of wedge projections along opposite sides of the at least one first attachment slot opening.

5. The improved inflatable knee bolster module assembly of claim 4 comprising a plurality of pairs of wedge projections spaced apart along opposite sides of the at least one first attachment slot opening.

6. The improved inflatable knee bolster module assembly of claim 3 wherein the at least one locking feature is adapted to yield upon application of a predetermined pressure thereagainst.

7. The improved inflatable knee bolster module assembly of claim 2 wherein at least the first attachment flange includes a plurality of first attachment slot openings and wherein the second first attachment extension includes a plurality of first attachment projections respectively generally corresponding to the plurality of the first attachment slot openings, wherein each of the first attachment projections is engageable with a respective one of the first attachment slot openings.

8. The improved inflatable knee bolster module assembly of claim 2 wherein at least the second attachment flange additionally includes at least one second attachment slot opening and wherein the second attachment extension includes at least one second attachment projection generally corresponding to the at least one second attachment slot opening, wherein the at least one second attachment projection is engageable with the at least one second attachment slot opening.

9. The improved inflatable knee bolster module assembly of claim 8 wherein:

at least the first attachment flange includes a plurality of first attachment slot openings and wherein the second first attachment extension includes a plurality of first attachment projections respectively generally corresponding to the plurality of the first attachment slot openings, wherein each of the first attachment projections is engageable with a respective one of the first attachment slot openings and

at least the second attachment flange includes a plurality of second attachment slot openings and wherein the second attachment extension includes a plurality of second attachment projections respectively generally corresponding to the plurality of the second attachment slot openings, wherein each of the second attachment projections is engageable with a respective one of the second attachment slot openings.

10. The improved inflatable knee bolster module assembly of claim 1 additionally comprising at least one first extension element joining the first attachment flange with the reaction plate.

11. The improved inflatable knee bolster module assembly of claim 1 wherein the reaction plate includes a generally planar section with a concave region adapted to receive the knee cushion inflator assembly.

12. An inflatable knee bolster module assembly comprising:

a knee bolster panel including a generally planar face portion;

a reaction plate adapted to engage with the knee bolster panel to form a bolster housing;

an inflatable knee cushion stored in an uninflated condition in the bolster housing; and

a knee cushion inflator assembly also stored in the bolster housing and actuatable to provide an inflation fluid effective to inflate the knee cushion and deploy the knee bolster panel to provide lower torso restraint for an oppositely positioned vehicle occupant while the knee bolster panel remains engaged with the reaction plate,

wherein the knee bolster panel also includes first and second spaced apart attachment flanges extending rearwardly from the face portion, the first attachment flange including at least one first attachment slot opening and the second attachment flange including at least one second attachment slot opening.

13. The inflatable knee bolster module assembly of claim 12 wherein the reaction plate includes a generally planar section and at least first and second oppositely disposed attachment projections generally corresponding to the first and second attachment slot openings of the first and second attachment flanges, respectively, wherein the first attachment projection is engageable with the first attachment slot opening and the second attachment projection is engageable with the second attachment slot opening to form the bolster housing.

14. An inflatable knee bolster module assembly comprising:

a knee bolster panel including a generally planar face portion and first and second spaced apart attachment flanges extending rearwardly from the face portion the first attachment flange including at least one first attachment slot opening and the second attachment flange including at least one second attachment slot opening;

a reaction plate including a generally planar section and having oppositely disposed first and second attachment extensions wherein the first attachment extension includes at least one first attachment projection generally corresponding to the first attachment slot opening of the first attachment flange and the second attachment extension includes at least one second attachment projection generally corresponding to the second attachment slot opening of the second attachment flange, wherein the first attachment projection is engageable with the first attachment slot opening and the second attachment projection is engageable with the second attachment slot opening to form a bolster housing;

an inflatable knee cushion stored in an uninflated condition in the bolster housing; and

a knee cushion inflator assembly also stored in the bolster housing and actuatable to provide an inflation fluid effective to inflate the knee cushion and deploy the knee bolster panel to provide lower torso restraint for an oppositely positioned vehicle occupant while the first attachment projection remains enraged with the first attachment slot opening and the second attachment projection remains engaged with the second attachment slot opening.

15. The inflatable knee bolster module assembly of claim 14 wherein the first attachment flange includes a plurality of spaced apart first attachment slot openings and the second attachment flange includes a plurality of spaced apart second attachment slot openings.

16. The inflatable knee bolster module assembly of claim 14 wherein the first attachment extension comprises a plurality of spaced apart first attachment projections.

17. The inflatable knee bolster module assembly of claim 16 wherein the second attachment extension comprises a plurality of spaced apart second attachment projections.