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:
Mar. 26, 2002
Filed:
Nov. 24, 1999
Franz-Josef Riesselmann, Lohne, DE;
Peter Braegelmann, Ochtrup, DE;
Hewing GmbH, Ochtrup, DE;
Abstract
A screw joint for pipes, in particular sanitary and floor heating pipes of, for example, plastic material or a composite material of metal and plastics is provided with at least one screw joint member with a substantially cylindrical portion, in which a thread with at least one helical raised portion of, in particular, triangular cross section is formed. The at least one raised portion of the thread has a base section adjoining or located in the cylindrical portion and an end section radially adjoining the base section. Within at least a part of the course of the thread, at least the end section of the at least one raised portion is made of a material that is more elastic than the material of the cylindrical portion.