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US 8,795,802 B2Granted
Foam duct
AssigneeKyoraku Co., Ltd.
InventorMasaaki Onodera
Life of this patent
Estimating the term…
Abstract
A foam duct in which rigidity is improvable includes a cylindrical portion having an external contour of a polygonal shape and a projection in an inner surface side of the cylindrical portion, and thickness of wall portions of the cylindrical portion is larger in a portion in which the projection is formed than in a portion in which the projection is not formed.
Claims6
A foam duct comprising foam resin, comprising:
- a cylindrical portion having an external contour of a polygonal shape;
- and
- a projection in an inner surface side of the cylindrical portion, wherein
- thickness of wall portions of the cylindrical portion is larger in a portion in which the projection is formed than in a portion in which the projection is not formed.
1 more element
Dependencies are inferred from the claim text.