Patent · US Active

Rotationally symmetrical hollow body made of a deformable permanently magnetic alloy and its use and production process

US7942981B2 · kind B2 · utility

0Cited by

14References

20Claims

0Family size

Assignee

Vacuumschmelze GmbH & Co. KG · DE

Inventors

Ottmar Roth · Ortenburg, DE
Hartwin Weber · Hanau, DE
Lutz Hinrich · Alzenau, DE
Jens Diehl · Langenselbold, DE

Key dates

Filing date	Sep 19, 2007
Grant date	May 17, 2011
Priority date	—
Expiry date	Mar 26, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/12465
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A seamless, rotationally symmetrical hollow blank formed by a non-cutting operation from a deformable permanently magnetic alloy is provided, said alloy consisting essentially of 5.0 to 20.0 percent by weight cobalt, 20.0 to 35.0 percent by weight chromium, for the remainder iron and impurities caused by melting and/or by chance. The seamless hollow body is suitable in particular for use in hysteresis clutches, hysteresis brakes, and position measuring devices. Furthermore, non-cutting shaping processes for producing the seamless rotationally symmetrical hollow body are provided, with roller spinning being preferred.

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