Patent · US Active

Spiral-wound diaphragm bellows, and method of making such a diaphragm bellows

US8181672B2 · kind B2 · utility

3Cited by

8References

17Claims

0Family size

Assignee

WESTFALIA METALLSCHLAUCHTECHNIK GMBH & CO. KG · DE

Inventors

Matthias Weiss · Hilchenbach, DE
Karl-Heinz Münker · Hilchenbach, DE
Dietmar Baumhoff · Olpe, DE
Oliver Selter · Attendorn, DE
Stefan Hauk · Hilchenbach, DE
Andreas Gerhard · Wenden, DE
Karsten Schenk · Treysa, DE

Key dates

Filing date	Apr 28, 2008
Grant date	May 22, 2012
Priority date	—
Expiry date	Feb 16, 2031

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21C37/122
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A diaphragm bellows includes a spiral-wound, pre-profiled metal strip having neighboring turns which are connected by a continuous welding seam in an area of an outer diameter or inner diameter of the metal strip. Neighboring flanks of the metal strip enter a region of the welding seam at an angle of less than 60°.

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