US 12,286,073 B2
Filter unit for gas generator, gas generator, and method for manufacturing gas generator
Tomoya Sasaki, Tokyo (JP)
Assigned to DAICEL CORPORATION, Osaka (JP)
Filed by Daicel Corporation, Osaka (JP)
Filed on May 10, 2024, as Appl. No. 18/660,252.
Application 18/660,252 is a continuation of application No. PCT/JP2022/024335, filed on Jun. 17, 2022.
Claims priority of application No. 2021-185185 (JP), filed on Nov. 12, 2021.
Prior Publication US 2024/0286575 A1, Aug. 29, 2024
Int. Cl. B60R 21/264 (2006.01); B01D 39/12 (2006.01); B01D 46/00 (2022.01); B01D 46/24 (2006.01); B60R 21/26 (2011.01)
CPC B60R 21/2644 (2013.01) [B01D 39/12 (2013.01); B01D 46/0005 (2013.01); B01D 46/24 (2013.01); B01D 2279/10 (2013.01); B60R 2021/26011 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A filter unit for a gas generator, the filter unit comprising:
a filter having a columnar outer shape; and
a filter housing accommodating the filter in a filter accommodating space formed inside the filter housing, the filter being accommodated in a coaxially positioned and fixed state, wherein
the filter housing includes
a first restraining end part disposed as a closing surface at one end of the filter housing and restraining a one axial end surface of the filter,
a second restraining end part disposed at an other end of the filter housing, surrounding a gas inflow port, and restraining an other axial end surface of the filter, and
a peripheral wall part connecting the first restraining end part and the second restraining end part and including a gas discharge port, the first restraining end part, the second restraining end part, and the peripheral wall part being integrally formed, and
the peripheral wall part includes
a restraining peripheral wall part restraining a peripheral surface of the filter, and
a non-restraining peripheral wall part in which the gas discharge port is disposed, the non-restraining peripheral wall part being disposed apart from the peripheral surface of the filter thereby forming an annular gap between the non-restraining peripheral wall part and the peripheral surface of the filter,
wherein the restraining peripheral wall part is parallel to the non-restraining peripheral wall part, and an annular stepped part connects the restraining peripheral wall part and the non-restraining peripheral wall part.