US 11,835,019 B2
Ventilation component
Ryusuke Kimura, Ichinomiya (JP)
Assigned to TOYOTA BOSHOKU KABUSHIKI KAISHA, Aichi-Ken (JP)
Appl. No. 17/788,201
Filed by TOYOTA BOSHOKU KABUSHIKI KAISHA, Aichi-ken (JP)
PCT Filed May 12, 2021, PCT No. PCT/JP2021/018058
§ 371(c)(1), (2) Date Jun. 22, 2022,
PCT Pub. No. WO2021/246120, PCT Pub. Date Dec. 9, 2021.
Claims priority of application No. 2020-095478 (JP), filed on Jun. 1, 2020.
Prior Publication US 2023/0041273 A1, Feb. 9, 2023
Int. Cl. F02M 35/12 (2006.01); G10K 11/172 (2006.01)
CPC F02M 35/12 (2013.01) [G10K 11/172 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A ventilation component, comprising a circumferential wall, wherein
an outer circumferential surface of the circumferential wall forms an outer circumferential surface of the ventilation component,
the circumferential wall is entirely formed by a wall portion, the wall portion being made of nonwoven fabric that has been subjected to thermal compression molding,
the wall portion includes:
an inner layer that has air permeability; and
an outer layer that is provided on a radially outer side of the inner layer and has elasticity, and
the wall portion forms a vibration system including the inner layer as a mass portion and the outer layer as a spring portion, the vibration system having a partially varying natural frequency.