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:
Sep. 18, 1990
Filed:
Dec. 09, 1988
Applicant:
Inventors:
Ali Guettouche, Haren, DE;
Jurgen Graafmann, Lingen, DE;
Assignee:
Wavin B.V., , NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
428 364 ; 138155 ; 138174 ; 428 369 ; 428219 ;
Abstract
A waste pipe system of an injection moulded or extruded pipe part of thermoplastic material with soundproofing properties having a weight per unit area of at least 8 kg/m.sup.2. The weight per unit area is adjusted by incorporating a filler in the plastic, preferably barium sulphate is used as such a filler. The density of the plastic pipe part is comprised between 1.8 and 2.7, preferably between 1.8 and 2.0 g/cm.sup.3. Suitable thermoplastic materials are PVC, polyolefins and ABS (acrylonitrile-butadiene-styrene) copolymer, particularly PVC or polypropylene. The plastic pipe part may also be a socket or a double sided socket.