Patent · US Expired

Double cone coupling nipple of a steel tubing and method of making same

US5997050A · kind A · utility

9Cited by

10References

8Claims

0Family size

Assignees

Daimlerchrysler AG · US
SIEBE Fluid Systems GmbH · DE

Inventors

Günter Fleckenstein · Eßlingen, DE
Thomas R. Schmitz · Oelde, DE
Manfred Meyer · Friedrichsdorf, DE
Siegbert Moosbrugger · Münsingen, DE

Key dates

Filing date	Jan 20, 1998
Grant date	Dec 7, 1999
Priority date	—
Expiry date	Jan 20, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49391
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A thin-walled steel tubing is to be constructed with a double cone coupling nipple for the tight screwed connection with a counterpart by way of a cap screw in a crack-resistant manner. The steel tubing is thin-walled and constructed of high-strength steel. With respect to the remaining tubing area, the nipple has at least partially at least approximately a double wall thickness. The steel tubing is not soft annealed at any point including the whole area of the nipple. With respect to the material, the contact surfaces of the nipple are harder than the surfaces of the countercontact. The cone angle of the sealing surface of the nipple measures over 100.degree..

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.