Gas deflector for gas generating system

• US 8,820,784 B1
• Filed: 09/23/2011
• Issued: 09/02/2014
• Est. Priority Date: 09/23/2010
• Status: Expired due to Fees

• Current Assignee: Joyson Safety Systems Acquisition, LLC (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: TK Holdings Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Mayville, Brian A., Tauchen, Dale E.
• Primary Examiner(s): Ilan, Ruth
• Application Number:
  US13/243,554
• Time in Patent Office: 1,075 Days
• Field of Search: 280/736, 280/740, 280/741, 280/742
• US Class Current: 280/742
• CPC Class Codes: B60R 21/261 with means other than bag structure to diffuse or guide inflation fluid

Abstract

A gas generating system is presented that contains a gas deflector positioned about an associated gas generator. The deflector may be attached to an outer wall of a perforate housing of the gas generator, or, alternatively, the deflector may be attached to a support structure positioned about the perforate housing, whereby gases exiting the gas generator upon actuation thereof, impinge upon the deflector.

Claims

1. A gas generating system comprising:

a cylindrical housing having at least a first and a second gas exit orifices formed therealong;

a first deflector portion attached directly to an exterior of the housing at a first attachment location angularly spaced apart from a location of the first gas exit orifice, so as to cover the first gas exit orifice, the first deflector portion having a first free end angularly spaced apart from the first attachment location and in direct contact with the housing prior to activation of the gas generating system; and

a second deflector portion attached directly to an exterior of the housing at a second attachment location angularly spaced apart from a location of the second gas exit orifice and also from the first attachment location, so as to cover the second gas exit orifice, the second deflector portion having a second free end angularly spaced apart from the second attachment location and in direct contact with the housing prior to activation of the gas generating system, the second free end being angularly spaced apart from the first free end so as to define a first gap between the first and second deflector portions at the first and second free ends,

the first and second deflector portions being structured so that the free ends of the each of the first and second deflector portions deflect in a direction away from the housing responsive to gases exiting the housing and impinging upon the deflector portions.

2. The gas generating system of claim 1 wherein the first and second deflector portions are structured to deflect responsive to gases exiting the housing and impinging upon the deflector portions, such that a width of the gap during impingement of the gases on the deflector portions is proportional to a pressure exerted by the gases on the deflector portions.

3. The gas generating system of claim 1 wherein said first attachment location is angularly spaced apart along an exterior of the housing 90 degrees or less from the location of the first gas exit orifice.

4. The gas generating system of claim 3 wherein the first attachment location is angularly spaced apart 90 degrees or less from the location of the second gas exit orifice.

5. The gas generating system of claim 1 wherein said first deflector portion is curved so as to contact an exterior surface of the housing between the first attachment location and the first free end, and wherein a radius of curvature of the first deflector portion resides on a plane perpendicular to a longitudinal axis of the housing.

6. The gas generating system of claim 5 wherein the second deflector portion is curved so as to contact an exterior surface of the housing between the second attachment location and the second free end, and wherein a radius of curvature of the second deflector portion resides on a plane perpendicular to a longitudinal axis of the housing.

7. A vehicle occupant protection system including a gas generating system in accordance with claim 1.

8. A gas generating system comprising:

a cylindrical housing having at least first, second, third, and fourth gas exit orifices formed therealong;

a first deflector portion attached directly to an exterior of the housing at a first attachment location angularly spaced apart from a location of the first gas exit orifice, so as to cover the first gas exit orifice, the first deflector portion having a first free end angularly spaced apart from the first attachment location and in direct contact with the housing prior to activation of the gas generating system; and

a second deflector portion attached directly to an exterior of the housing at a second attachment location angularly spaced apart from a location of the second gas exit orifice, so as to cover the second gas exit orifice, the second deflector portion having a second free end angularly spaced apart from the second attachment location and in direct contact with the housing prior to activation of the gas generating system,

the second free end being angularly spaced apart from the first free end so as to define a first gap between the first and second deflector portions at the first and second free ends,

a third deflector portion attached directly to an exterior of the housing at the first attachment location so as to cover the third gas exit orifice, the third gas exit orifice angularly spaced apart from the first attachment location, the third deflector portion having a third free end angularly spaced apart from the first attachment location and in direct contact with the housing prior to activation of the gas generating system; and

a fourth deflector portion attached directly to an exterior of the housing at the second attachment location so as to cover the fourth gas exit orifice, the fourth gas exit orifice being angularly spaced apart from the second attachment location, the fourth deflector portion having a fourth free end angularly spaced apart from the second attachment location and in direct contact with the housing prior to activation of the gas generating system,

the fourth free end being angularly spaced apart from the third free end so as to define a second gap between the third and fourth deflector portions at the third and fourth free ends,

the first and second deflector portions being structured so that the free ends of each of the first and second deflector portions deflect in a direction away from the housing responsive to gases exiting the housing and impinging upon the deflector portions, and such that gases flowing off of the first deflector free end and through the first gap are urged in a first direction, and gases flowing off of the second deflector free end and through the first gap are urged in a second direction converging with the first direction, and

the third and fourth deflector portions being structured so that the free ends of each of the third and fourth deflector portions deflect in a direction away from the housing responsive to gases exiting the housing and impinging upon the deflector portions, and such that gases flowing off of the third deflector free end and through the second gap are urged in a third direction, and gases flowing off of the fourth deflector free end and through the second gap are urged in a fourth direction converging with the third direction.

9. The gas generating system of claim of claim 8 wherein the second gap is located on a side of the housing diametrically opposite the first gap.

10. A vehicle occupant protection system including a gas generating system in accordance with claim 8.

11. A gas generating system comprising:

a cylindrical housing having a plurality gas exit orifices formed therealong; and

a first deflector portion attached directly to an exterior of the housing at a first attachment location angularly spaced apart from the gas exit orifices, so as to cover the first gas exit orifice, the first deflector portion having a first free end angularly spaced apart from the first attachment location and in direct contact with the housing prior to activation of the gas generating system;

a second deflector portion attached directly to an exterior of the housing at a second attachment location angularly spaced apart from the gas exit orifices and also from the first attachment location, so as to cover the second gas exit orifice, the second deflector portion having a second free end angularly spaced apart from the second attachment location and in direct contact with the housing prior to activation of the gas generating system,

the second free end being angularly spaced apart from the first free end so as to define a first gap between the first and second deflector portions at the first and second free ends such that gases exiting the housing and impinging upon the first and second deflector portions are directed through the first gap;

a third deflector portion attached directly to an exterior of the housing at the first attachment location so as to cover a third gas exit orifice, the third deflector portion having a third free end angularly spaced apart from the first attachment location and in direct contact with the housing prior to activation of the gas generating system; and

a fourth deflector portion attached directly to an exterior of the housing at the second attachment location so as to cover a fourth gas exit orifice, the fourth deflector portion having a fourth free end angularly spaced apart from the second attachment location and in direct contact with the housing prior to activation of the gas generating system,

the fourth free end being angularly spaced apart from the third free end so as to define a second gap between the third and fourth deflector portions at the third and fourth free ends, such that gases exiting the housing and impinging upon the third and fourth deflector portions are directed through the second gap.

12. The gas generating system of claim 11 wherein the second deflector portion is physically separate from the first deflector portion.

13. The gas generating system of claim 11 wherein the fourth deflector portion is physically separate from the third deflector portion.

14. A vehicle occupant protection system including a gas generating system in accordance with claim 11.