Wire cover for an air bag inflator

• US 5,340,339 A
• Filed: 02/19/1993
• Issued: 08/23/1994
• Est. Priority Date: 02/19/1993
• Status: Expired due to Fees

• Current Assignee: Alliedsignal Inc.
• Original Assignee: Alliedsignal Inc.
• Inventors: Desai, Trilok, Goestenkors, Gregory N., Boumarafi, Mohamed
• Primary Examiner(s): Abrams, Neil
• Application Number:
  US08/019,722
• Time in Patent Office: 550 Days
• Field of Search: 439/521-523, 439/281, 439/282, 439/892, 439/893, 174/138 F, 174/65 R
• US Class Current: 439/892
• CPC Class Codes: B60R 21/017 including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves
• CPC Class Codes: B60R 21/26 characterised by the inflation fluid source or means to control inflation fluid flow arrangement or mounting thereof to the vehicle B60R21/20; blasting cartridges for producing gas under pressure in general F42B3/04; initiators or igniters therefor F42B3/10

Abstract

A cover for protecting at least one wire extending from an air bag inflator comprising: a top (52), including a circular shaped first portion (54) and a narrow three-sided flange portion (56) extending radially outward from first portion; a circularly shaped first wall (58) having first (60) and second ends (62) and a bottom surface defining a shoulder (64) extending downwardly from the first portion, the first wall terminating proximate the location of the flange portion to define a space (65) between the first and second ends of the first wall. An inner surface (66) of the first wall includes a diameter smaller than the diameter of an the end portion (24) of the inflator. The cover additionally includes a circularly shaped second wall (70) extending downwardly from the first wall, having an inner (72) surface. A groove (74) is formed within the inner surface, to receive an edge of the end portion (24). The second wall includes a portion (80) which extends upwardly to join the first and second ends of the first wall closing the space (65) therebetween; and axial slits for permitting the second wall to flex.

Claims

1. A cover (50;

200) for matingly engaging one end of a gas inflator and for protecting at least one wire extending from the inflator, the at least one wire terminating in at a fist electrical connector, the inflator having a cylindrical body terminating in an end portion (24), the end portion having a diameter greater than the diameter of the body to define and edge, lip or ledge (26) extending about the body;

the cover comprising;

first means for enclosing a portion of the wire to inhibit the inflator from being carried by the wire, the first means including;

a top (52);

a first wall (58) extending downwardly from the first portion, an inner surface (66) of the first wall having a diameter smaller than the diameter of the end portion (24);

the top, first wall and end of the inflator defining a volume for receiving the at least one wire;

a second wall (70) extending downwardly from the first wall, having an inner (72) surface, a groove (74) formed within the inner surface, to receive an edge of the end portion (24);

and means for permitting the second all to flex as it is seated upon the inflator.

2. The cover as defined in claim 1 wherein the inner surface (72) of the second wall (70) includes a chamfer or ramp (100) proximate a lower edge thereof.

3. The cover as defined in claim 1 wherein the top is at least partially circular shaped, a narrow three-sided flange portion 56 extends radially outward from the top, and wherein the first wall includes first (60) and second ends (62) and a bottom surface defining an inside shoulder (64), the first wall terminating proximate the location of the flange portion to define a space (65) between the first and second ends of the first wall, and wherein the second wall includes an extending portion (80) which extends upwardly to join the first and second ends of the first wall closing the space (65) therebetween and wherein the extending portion includes including second means for permitting a portion of the at least one wire connected to the first connector to radially exit from the cover, the remaining portion of the at least one wire retained in the volume below the top and between the first wall, including.

4. The cover as defined in claim 3 wherein the second means second means includes in a narrow slitted opening (96) and an enlarged opening (98) above the slitted opening, the enlarged opening located generally between the first and second ends of the first wall, the enlarged opening is sufficient in size to receive at least one wire with a corresponding connector extending therefrom.

5. The cover as defined in claim 4 wherein the flex means comprises expansion slits or grooves (90a,b,c).

6. The cover as defined in claim 4 wherein one of the expansion slits (90a) is located in the extending portion (80) and is part of the second means.

7. The cover as defined in claim 3 wherein the bottom surface (64) of the first wall is arcuately shaped and wherein the width of the first wall, measured from the inner surface of the second wall to the inner surface of the first wall is less than or equal to one half the effective diameter of the at least one wire.

8. A cover (50;

200) for matingly engaging one end of a gas inflator and for protecting at least one wire extending from the inflator, the at least one wire terminating in at least one electrical connector, the inflator having a cylindrical body terminating in an end portion (24), the end portion having a diameter greater than the diameter of the body to define an edge, lip or ledge (26) extending about the body;

the cover comprising;

a top (52);

a first wall (58) extending downwardly from the first portion, an inner surface (66) of the first wall having a diameter smaller than the diameter of the end portion (24);

the top, first wall and end of the inflator defining a volume for receiving the at least one wire;

a second wall (70) extending downwardly from the first wall, having an inner (72) surface, a groove (74) formed within the inner surface, to receive an edge of the end portion (24);

and means for permitting the second wall to flex as it is seated upon the inflator including holding means, located on the underside of the top, for holding at least one wire connector and wherein a portion of the cover is removed to provide access to the at lest one electrical connector.

9. The cover as defined in claim 8 including two electrical connectors and means for holding these two electrical connectors to the underside of the cover.

10. The cover as defined in claim 9 wherein the holding means includes two connector holders each of which includes means for differentiating between the two wire connectors such that only one of the electrical connectors is connectable to a particular connector holder.