Pipe connector

US6585299B1 · kind B1 · utility

Assignee

• Mannesmann AG · DE

Inventors

• Erich Quadflieg · Krefeld, DE
• Gerhard Krug · Duisburg, DE
• Friedrich Lenze · Ratingen, DE
• Martin Schluter · Schallstadt, DE

Key dates

• Filing date: Mar 27, 2000
• Grant date: Jul 1, 2003
• Expiry date: Mar 27, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16L15/004
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pipe joint with a sleeve element, which has an internal thread, and with a spigot element, which has an external thread which can be screwed to said internal thread. One element has a constant pitch throughout and the other element, with two sections extending in each case from the ends of the threaded length is likewise provided with a constant pitch. The other element has more than two sections with a pitch which is constant within the section but is different from the first-mentioned element, it being the case that the pitch difference at least of one section is in the opposite direction, in terms of sign, to the rest of the sections. The pitch difference of one section is at least double that of the adjacent sections and in the screwed-together position, in the section with the large pitch difference, the thread play and the thread tolerances are compensated and the load flank of one corner tooth of this section, with the guide flank of the other corner tooth, produces the basic bracing. The two adjacent sections, with their load and/or guide flanks, build up the thread bracing until the desired thread torque has been reached.