Duct
AssigneeToyota Boshoku Kabushiki Kaisha
InventorRyusuke Kimura
Life of this patent
Estimating the term…
Abstract
A duct includes a circumferential wall. At least part of the circumferential wall is a fibrous portion that includes fibers. The fibrous portion includes a breathable inner layer located on an inner circumferential side in the circumferential wall and an outer layer located on an outer circumferential side of the inner layer in the circumferential wall. The outer layer is less breathable than the inner layer. A boundary between the inner layer and the outer layer is breathable.
Claims4
A duct comprising a circumferential wall, at least part of the circumferential wall being a fibrous portion that includes fibers, wherein the fibrous portion includes:
- a breathable inner layer located on an inner circumferential side in the circumferential wall;
- and an outer layer located on an outer circumferential side of the inner layer in the circumferential wall, the outer layer being less breathable than the inner layer;
- a boundary between the inner layer and the outer layer is breathable, wherein the inner layer and the outer layer are joined to each other by interlacing fibers of the inner layer and the outer layer, wherein the fibrous portion becomes gradually less breathable from the inner circumferential side toward the outer circumferential side in the circumferential wall, and wherein the duct is an intake duct for an engine.
Dependencies are inferred from the claim text.