Motor Vehicle Safety Restraint System

• US 20100090449A1
• Filed: 10/09/2008
• Published: 04/15/2010
• Est. Priority Date: 10/09/2008
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: Thomas, Scott D.
• Granted Patent: US 7,862,081 B2
• Time in Patent Office: Days
• US Class Current: 280/733
• CPC Class Codes: B60R 2022/4647 the driving means being a belt, a chain or the like
• CPC Class Codes: B60R 21/207 in vehicle seats
• CPC Class Codes: B60R 22/1952 Transmission of tensioning power by cable; Return motion locking means therefor
• CPC Class Codes: B60R 22/1955 Linear actuators
• CPC Class Codes: B60R 22/4628 characterised by fluid actuators, e.g. pyrotechnic gas generators actuating a cable B60R22/4619

Abstract

A safety restraint system for selectively restraining an occupant of a motorized vehicle is provided. The safety restraint system includes a cylinder defining an elongate channel therein. A piston is disposed inside the channel, and selectively translates from an undeployed position to a deployed position. A linking member operatively connects the safety belt webbing to the piston such that translation of the piston increases the tension of the belt webbing. The safety restraint system also includes an inflatable cushion operatively attached to the cylinder, and configured to selectively transition from a non-expanded state to an expanded state. An inflation device operable to release inflation fluid is in fluid communication with both the inflatable cushion and the cylinder. Activation of the inflation device operates to transition the cushion from the non-expanded state to the expanded state, and translate the piston from the undeployed position to the deployed position.

Claims

1. A safety restraint system for a motorized vehicle having a passenger compartment with a safety belt assembly mounted therein, the safety belt assembly having a belt webbing, the safety restraint system comprising:

a tubular member defining an elongate channel;

a piston member operatively disposed inside said channel to selectively translate from an undeployed position to a deployed position;

a linking member operatively connecting the belt webbing to said piston member such that translation of said piston member increases tension of the belt webbing;

a cushion member operable to selectively transition from a non-expanded state to an expanded state; and

an inflation device in fluid communication with both said cushion member and said tubular member, wherein activation of said inflation device operates to transition said cushion member from said non-expanded state to said expanded state and translate said piston member from said undeployed position to said deployed position.

2. The safety restraint system of claim 1, wherein at least a portion of said cushion member is wrapped around said tubular member.

3. The safety restraint system of claim 2, wherein said cushion member envelops substantially all of said tubular member.

4. The safety restraint system of claim 2, wherein said tubular member defines at least one vent hole therethrough, said at least one vent hole fluidly communicating said tubular member with said cushion member.

5. The safety restraint system of claim 4, wherein said at least one vent hole is configured to fluidly communicate said inflation device with said cushion member only after said piston member translates a predetermined distance from said undeployed position.

6. The safety restraint system of claim 2, wherein said linking member is a cable rigidly attached at a first end thereof to the belt webbing and at an opposing second end to said piston member.

7. The safety restraint system of claim 6, further comprising:

a bracket member attached to said tubular member proximate to said first end of said channel, said bracket member adapted to guide said cable during translation of said piston member from said undeployed position to said deployed position.

8. The safety restraint system of claim 7, wherein said cushion member is further wrapped around at least a portion of said bracket member.

9. The safety restraint system of claim 8, wherein said cushion member is further wrapped around at least a portion of an upper extent of said cable.

10. The safety restraint system of claim 7, wherein said bracket member defines at least one gas escape path, said at least one gas escape path fluidly communicating said inflation device with said cushion member.

11. The safety restraint system of claim 10, wherein said at least one gas escape path is configured to direct fluid from said inflation device to said cushion member before said piston member translates away from said undeployed position.

12. The safety restraint system of claim 1, further comprising:

a closeout cover housing both said tubular member and said cushion member.

13. The safety restraint system of claim 12, further comprising:

a collapsible casing operatively attached at a first end thereof to said closeout cover and configured to enclose an upper extent of said linking member therein.

14. The safety restraint system of claim 13, wherein at least a portion of said cushion member is stowed inside said collapsible casing when said cushion member is in said non-expanded state.

15. The safety restraint system of claim 14, wherein said collapsible casing includes one of a tear seam and a material overlap joint configured to open such that said cushion member deploys through said collapsible casing when transitioning from said non-expanded state to said expanded state.

16. The safety restraint system of claim 14, wherein a portion of said cushion member is positively attached to the belt webbing.

17. The safety restraint system of claim 1, wherein said linking member includes a belt retractor member.

18. The safety restraint system of claim 17, wherein said belt retractor member, tubular member, and cushion member are housed inside a side-trim panel, said cushion member deploying through said side-trim panel when transitioning from said non-expanded state to said expanded state.

19. The safety restraint system of claim 18, wherein a portion of said cushion member deploys within said side-trim panel when transitioning from said non-expanded state to said expanded state thereby pushing a portion of said trim panel inboard.

20. A safety restraint system for selectively restraining an occupant of a motorized vehicle having a passenger compartment with a safety belt assembly mounted therein, the safety belt assembly having a belt webbing operatively mounted proximate to a seat assembly, the safety restraint system comprising:

an inflator operable to release inflation fluid;

a cylinder defining a channel elongated axially therein and in fluid communication with said inflator, said channel having first and second opposing ends, said cylinder further defining at least one vent hole therethrough;

a piston disposed inside said cylinder, and operable to selectively axially translate between said first and second ends of said channel from an undeployed position to a deployed position;

a linking member operatively connecting the belt webbing to said piston such that translation of said piston retracts a predetermined length of the belt webbing to thereby increase tension of the belt webbing;

an inflatable cushion with at least a portion thereof wrapped around said cylinder such that said at least one vent hole fluidly communicates said inflatable cushion with said cylinder, said inflatable cushion being operable to selectively transition from a non-expanded state, in which said cushion is generally stowed, to an expanded state, in which said cushion is deployed into the vehicle passenger compartment; and

wherein activation of said inflator operates to transition said inflatable cushion from said non-expanded state to said expanded state and translate said piston from said undeployed position to said deployed position.