Charge-air hose for motor vehicles having two knit plies

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United States of America Patent

PATENT NO 9140390
APP PUB NO 20130167964A1
SERIAL NO

13780862

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Importance

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Abstract

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A method for making a charge-air hose for a motor vehicle includes producing a continuous inliner having a cylindrical inner surface in an extrusion process while pneumatically shaping the cylindrical inner surface without a mandrel by bringing the inner cylindrical surface to an inner diameter D1. Thereafter, an elastomeric inner ply, a first knit ply, an elastomeric intermediate ply, a second knit ply and an elastomeric outer ply are applied to the inliner successively, coaxially and continuously to form a continuous charge-air hose section. The first and second knit plies are made from an endless yarn and have respective orientations different from each other. Charge-air hose blanks are cut to length and the charge-air hose blanks are shaped with a mandrel defining a curved longitudinal axis and having a diameter D2 which, in at least a longitudinal segment, is at least 6% greater than the inner diameter D1.

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Patent Owner(s)

Patent OwnerAddress
CONTITECH SCHLAUCH GMBH30165 HANNOVER

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brettschneider, Ulrich Osterode, DE 2 11

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