The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2009
Filed:
Mar. 13, 2007
Andreas Dowe, Borken, DE;
Michael Boeer, Olfen, DE;
Karl Kuhmann, Duelmen, DE;
Guido-jan Schmitz, Duelmen, DE;
Andreas Dowe, Borken, DE;
Michael Boeer, Olfen, DE;
Karl Kuhmann, Duelmen, DE;
Guido-Jan Schmitz, Duelmen, DE;
Degussa GmbH, Duesseldorf, DE;
Abstract
A pipe includes an outer layer composed of a molding composition which includes at least 40% by weight of a polyamide whose monomer units contain an average of at least 8 carbon atoms, and a layer composed of a polypropylene molding composition. An outer diameter of the pipe is in a range from 6 to 20 mm, a wall thickness of the pipe is in a range from 1.0 to 2.0 mm, and a thickness of the polypropylene layer is from 25 to 75% of the wall thickness. The pipe can be used as an air-brake line that can be produced at low cost, has high bursting strength, and has good low-temperature impact resistance.