Patent · US Expired

Device for forming an end area of a workpiece

US6708548B2 · kind B2 · utility

14Cited by

6References

15Claims

0Family size

Assignee

Parker-Hannifin Corporation · US

Inventors

Dieter Ehrke · Bielefeld, DE
Udo Hunkenschroeder · Bielefeld, DE
Frank Runte · Bad Laasphe, DE
Martin Ziehl · Hövelhof, DE

Key dates

Filing date	Sep 30, 2002
Grant date	Mar 23, 2004
Priority date	—
Expiry date	Sep 30, 2022

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21J9/06
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The invention relates to a device for forming an end area of a workpiece (2), especially for cold press-forming an end area of a pipe, comprising two force transmitting elements (7, 9) which are guided in a common housing (3). The device is characterised in that a first pressure chamber (26) is located between the two force transmission elements (7, 9) and in that a second pressure chamber (28) is allocated to the second force transmission element (9). When the first force transmission element (7) is in the bracing position, the second force transmission element (9) can be displaced in relation to the first force transmission element (7) in order to form the workpiece.

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