Aspirating inflator assembly

• US 4,928,991 A
• Filed: 03/08/1989
• Issued: 05/29/1990
• Est. Priority Date: 03/08/1989
• Status: Expired due to Term

• Current Assignee: Automotive Systems Laboratory, Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Automotive Systems Laboratory, Incorporated (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Thorn, William F.
• Primary Examiner(s): Bertsch, Richard A.
• Application Number:
  US07/320,396
• Time in Patent Office: 447 Days
• Field of Search: 280/743, 280/739, 280/728, 280/732, 280/738, 417/167, 417/185, 417/161
• US Class Current: 280/738
• CPC Class Codes: B60R 21/30 with means to draw ambient air into the flow line and mix such air with the inflation fluid
• CPC Class Codes: G02B 3/08 with discontinuous faces, e.g. Fresnel lens diffractive Fresnel lenses G02B5/1876

Abstract

An aspirating inflator assembly for a vehicle occupant restraint system comprises a housing having spaced sidewalls, a back wall and an openable front wall. An airbag is stored internally of the housing. Multiple gas generators are supported on or adjacent to the back wall of the housing. The housing has a plurality of apertures in the sidewalls thereof that are normally closed by valves which are openable to aspirate ambient air into the housing but preclude exhaust of air outwardly of the housing.

Claims

1. An aspirating inflator assembly for a vehicle occupant restraint system comprising,

a housing defined by spaced sidewalls, a back wall and an openable front panel,

an airbag attached to and stored internally of said housing,

a plurality of gas generators supported adjacent to the back wall of said housing,

a plurality of apertures in at least one sidewall of said housing, and

a valve on said housing for admitting ambient air thereinto through said apertures but precluding exhaust of air outwardly of said housing, the frontal panel on said housing being openable upon energization of said gas generator to facilitate deployment of said airbag.

2. An inflator assembly in accordance with claim 1 wherein said airbag is stored adjacent said front panel.

3. An inflator assembly in accordance with claim 1 wherein said apertures are disposed adjacent the back wall of said housing.

4. An inflator assembly in accordance with claim 1 wherein said cartridges are cantilevered from the back wall of said housing.

5. An inflator assembly in accordance with claim 1 wherein the sidewalls of said housing are imperforate adjacent the front wall thereof.

6. An inflator assembly in accordance with claim 1 wherein each gas generator assembly is equipped with an individual electric igniter.

7. An inflator assembly in accordance with claim 6 wherein said igniters are electrically connected in a common electrical circuit.

8. An inflator assembly in accordance with claim 7 wherein the common circuit for said gas generators comprises a printed circuit board.

9. An inflator assembly in accordance with claim 1 wherein said valve comprises a flapper-type valve.

10. An inflator assembly in accordance with claim 9 wherein said flapper valve is hinged at a frontal extremity thereof to enhance closing upon the occurrence of an air flow reversal.