# US 12,109,964 B2 · Airbag device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,109,964 B2 - Document ID: US12109964B2 - Status: Granted - Kind: B2 - Application number: 18/000,037 - Filed: 2021-04-28 - Published: 2023-06-29 - Granted: 2024-10-08 - Earliest claimed: 2020-05-28 - Assignees: Autoliv Development AB - Applicants: Yoshiki Ito; Yutaka Nakajima; Autoliv Development AB - Inventors: Yoshiki Ito; Yutaka Nakajima - Web page: https://patentgrep.com/patent/US12109964B2 ## CPC - B60R 21/207: in vehicle seats - B60R 21/23138: {specially adapted for side protection (B60R21/23184, B60R21/232 take precedence)} - B60R 21/237: characterised by the way they are folded - B60R 2021/23146: {seat mounted} - B60R 2021/23161: {specially adapted for protecting at least two passengers, e.g. preventing them from hitting each other} - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR ## Abstract An airbag device provided with an airbag and inflator integrally covering the head and side sections of an occupant seated in a vehicle seat. The airbag, includes, during expansion and deployment, a head protecting chamber that covers the head of the occupant and side protecting chambers that cover the side sections of the occupant, and is stowed in a rolled state, for example, from a first side of the backrest of the vehicle seat to the second side over the upper portion. An additional folding part is provided on the outer periphery of the airbag extending from the attachment end side to the backrest so as to cover at least a part of the outer periphery of the airbag on the side opposite to the seated occupant. ## Claims ### Claim 1 An airbag device, the airbag device comprising: an airbag that expands and deploys to integrally cover the head and side sections of an occupant seated in a vehicle seat; and an inflator that supplies gas to the airbag, wherein the airbag includes: a head protecting chamber that covers the head of the occupant and side protecting chambers that cover the side sections of the occupant when the airbag is in an expansion completed state where expansion and deployment are completed; and in a state where the airbag is stowed rolled in a roll shape or folded in a bellows shape, and stowed in a backrest of the vehicle seat from a first side to a second side over a top part, there is an additional folding part extending from the outer periphery of the attachment end side of the stowed airbag to the backrest, where the additional folding part is provided covering at least a portion of the rear side of the stowed airbag that is rolled in a roll shape or folded in a bellows shape, wherein a free end of the additional folding part is secured directly to a top-most exterior surface of the vehicle seat. ### Claim 2 (depends on 1) The airbag device according to claim 1, wherein the additional folding part is provided so as to extend from the vicinity of the surface of the backrest to the vicinity of the top part along the shape of the outer periphery of the rear side of the stowed airbag, and is folded downward in the vicinity of the top part, reaching the vicinity of the surface of the backrest. ### Claim 3 (depends on 1) The airbag device according to claim 1, wherein the additional folded portion is provided to further cover the top portion of the stowed airbag. ### Claim 4 (depends on 3) The airbag device according to claim 3, wherein the additional folding part is provided so as to also cover a portion of the top part of the front side of the stowed airbag, which continues from the top portion over the top portion thereof. ### Claim 5 (depends on 1) The airbag device according to claim 1, wherein the additional folding portion is provided at least in a portion corresponding to the head protecting chamber. ### Claim 6 (depends on 3) The airbag device according to claim 3, wherein the additional folding part is provided at least in a portion corresponding to the head protecting chamber. ### Claim 7 (depends on 4) The airbag device according to claim 4, wherein the additional folding part is provided at least in a portion corresponding to the head protecting chamber. ### Claim 8 (depends on 1) The airbag device according to claim 1, wherein the free end of the additional folding part is secured to the top surface of the vehicle seat via an attachment end. ### Claim 9 (depends on 1) The airbag device according to claim 1, wherein the airbag is rolled about an axis extending in a width direction of vehicle seat when the airbag is stowed. ### Claim 10 (depends on 1) The airbag device according to claim 1, wherein the airbag includes first and second chambers that are symmetrical to one another about a longitudinal centerline of the airbag. ### Claim 11 (depends on 10) The airbag device according to claim 10, wherein the first and second chambers are inflated by first and second inflators, respectively. ### Claim 12 (depends on 1) The airbag device according to claim 1, wherein the additional folding part extends at least approximately half a circumference of an outer periphery of the airbag in a rolled state of a side adapted to be disposed opposite the occupant. ### Claim 13 (depends on 1) The airbag device according to claim 1, wherein the airbag in a stowed state has a main deployment section that is rolled in a roll shape or folded in a bellows shape, the additional folding part extending from the main deployment section to an attachment end for attachment to the vehicle seat so as to cover at least a side of the main deployment part adapted to be disposed opposite the occupant. ### Claim 14 (depends on 1) The airbag device according to claim 1, in combination with the vehicle seat.