# US 9,751,491 B2 · Side airbag device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,491 B2 - Document ID: US9751491B2 - Status: Granted - Kind: B2 - Application number: 15/026,002 - Filed: 2014-10-21 - Published: 2016-08-04 - Granted: 2017-09-05 - Earliest claimed: 2013-10-30 - Assignees: Mazda Motor Corporation; Ashimori Industry Co., Ltd. - Applicants: Mazda Motor Corporation; Ashimori Industry Co., Ltd. - Inventors: Yuichi Sugimura; Taei Shibahara; Shinji Okada; Masato Hoshino; Hidetaka Azuma; Kou Sasaki; Yoshitaka Okagami - Web page: https://patentgrep.com/patent/US9751491B2 ## CPC - B60R 21/233: comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other (B60R21/232 takes precedence) - B60R 21/207: in vehicle seats - B60R 21/23138: {specially adapted for side protection (B60R21/23184, B60R21/232 take precedence)} - B60R 21/261: with means other than bag structure to diffuse or guide inflation fluid - B60R 21/2346: Soft diffusers - B60R 21/239: characterised by their venting means - B60R 2021/0006: {Lateral collision} - B60R 2021/0032: {Position of passenger} - B60R 2021/23146: {seat mounted} - B60R 2021/23324: {Inner walls crating separate compartments, e.g. communicating with vents} - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR ## Abstract A side airbag device includes an inflator and an airbag. The airbag includes a deployable bag and a separator that separates the bag into a first chamber and a second chamber. The first chamber includes a support inflation portion and a protection inflation portion. The support inflation portion is deployable in such a shape that it gradually broadens from its lower end portion toward its upper end portion along a seat-side portion. The protection inflation portion is deployable at one end side of the support inflation portion. The inflator is disposed to supply a gas into the support inflation portion. The separator includes at least one gas distribution hole in a portion thereof that separates the support inflation portion of the first chamber and the second chamber from each other. The second chamber is provided below the first chamber. ## Claims ### Claim 1 A side airbag device to be incorporated in a seat-side portion of a vehicle, said side airbag device comprising: an inflator; and an airbag including a bag that is inflatable and a separator that separates said bag into a first chamber and a second chamber, said separator extending above a top of said inflator, wherein: said first chamber includes a support inflation portion and a protection inflation portion, said support inflation portion being deployable in such a shape that said support inflation portion gradually broadens from its lower end portion toward its upper end portion along said seat-side portion, said protection inflation portion being deployable above said upper end portion of said support inflation portion, said inflator is disposed so as to supply a gas into said support inflation portion, said separator includes at least one gas distribution hole, and said second chamber is located below said first chamber, wherein a part of said support inflation portion is level with said inflator with respect to a direction in which the seat-side portion extends vertically. ### Claim 2 (depends on 1) The side airbag device according to claim 1, wherein said lower end portion of said support inflation portion is located at a lower edge of an overlapping portion of said airbag, said overlapping portion being disposed and deployable to overlap said seat-side portion. ### Claim 3 (depends on 1) The side airbag device according to claim 1, wherein a side portion of said support inflation portion between said separator and a rear portion of the bag opposing the portion of said separator is provided to be abuttable against said seat-side portion entirely in a direction in which said side portion extends. ### Claim 4 (depends on 1) The side airbag device according to claim 1, wherein said separator is a belt-shaped partition having both end portions joined to portions of said bag opposing the both end portions. ### Claim 5 (depends on 4) The side airbag device according to claim 4, wherein an intermediate portion of said partition in its extension direction is formed with a width varying along the extension direction. ### Claim 6 (depends on 1) The side airbag device according to claim 1, wherein said second chamber includes a gas exhaust port. ### Claim 7 (depends on 1) The side airbag device according to claim 1, wherein said support inflation portion is substantially cone-shaped. ### Claim 8 (depends on 1) The side airbag device according to claim 1 wherein said support inflation portion is substantially pyramid-shaped. ### Claim 9 (depends on 1) The side airbag device according to claim 1, wherein a flow rate of gas into the second chamber is smaller than a flow rate of gas into the upper end portion of the support inflation portion and the protection inflation portion. ### Claim 10 A side airbag device to be incorporated in a seat-side portion of a vehicle, said side airbag device comprising: an inflator; and an airbag including a bag that is inflatable and a separator that separates said bag into a first chamber and a second chamber, said separator extending above a top of said inflator, wherein: said first chamber includes a support inflation portion and a protection inflation portion, said support inflation portion being deployable in such a shape that said support inflation portion gradually broadens from its lower end portion toward its upper end portion along said seat-side portion, said protection inflation portion being deployable above said upper end portion of said support inflation portion, said inflator is disposed so as to supply a gas into said support inflation portion, said separator includes at least one gas distribution hole, and said second chamber is located below said first chamber, wherein the lower end portion of said support inflation portion forms a pointed end portion in gas communication with said inflator. ### Claim 11 (depends on 10) The side airbag device according to claim 10, wherein said support inflation portion is substantially cone-shaped. ### Claim 12 (depends on 10) The side airbag device according to claim 10, wherein said support inflation portion is substantially pyramid-shaped. ### Claim 13 (depends on 10) The side airbag device according to claim 10, wherein a flow rate of gas into the second chamber is smaller than a flow rate of gas into the upper end portion of the support inflation portion and the protection inflation portion.