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:
Jul. 18, 1995
Filed:
Feb. 23, 1993
Franz J Wolf, Bad Soden-Salmunster, DE;
Uwe Reichert, Schluchtern, DE;
WOCO Franz-Josef Wolf & Co., Bad Soden-Salmunster, DE;
Abstract
The invention concerns a dimensionally stable, elastically bending plastic coaxial tube for fluids, consisting of an outer tube and of at least one inner tube mounted in said outer tube in hermetically fluid-tight but separate manner, said inner tube being held in position in essentially coaxial manner relative to the said outer tube by means of spacers between, and integral with, the constituent tubes, each spacer being integral with only one of the constituent tubes and being so configured and arrayed that the outer tube and the inner tube are freely axially displaceable relative to each other at least to some limited extent. The coaxial tube is manufactured in that the inner tube is prefabricated, in particular by extrusion, and in that the outer tube is molded in-situ around the cooled inner tube, in particular by coaxial sheath extrusion.