Patent · US Expired

Workpiece holder for a vertical broaching machine for broaching annular workpieces

US4106785A · kind A · utility

1Cited by

2References

10Claims

0Family size

Assignee

Oswald Forst Maschinenfabrik und Apparatebauanstalt GmbH & Co. KG

Inventors

Wolfgang Marten · Solingen, DE
Herbert Holstein · Solingen, DE
Gustav Esser

Key dates

Filing date	Jan 7, 1977
Grant date	Aug 15, 1978
Priority date	—
Expiry date	Jan 7, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T409/40595
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A workpiece holder for a vertical broaching machine for broaching annular workpieces is provided with at least two centering pieces for radial immobilization of the workpieces. The centering pieces are radially pressable against an annular surface of the workpiece by a common drive means. The centering pieces are displaced until they rest firmly against the radial surface of the workpiece, thus ensuring that diametrical tolerances of the workpiece are completely eliminated.

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