The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 2002
Filed:
Mar. 12, 2001
Applicant:
Inventors:
Cecilia Elgelid, Helsingborg, SE;
Anne Larsson-Westberg, Helsingborg, SE;
Lars-Åke Larsson, Höganäs, SE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F 1/02 ;
U.S. Cl.
CPC ...
B22F 1/02 ;
Abstract
The invention concerns a process for the preparation of a compressed soft magnetic powder core comprising the steps of compacting an iron based powder the particles of which are insulated by a chromium containing layer, at a pressure between 300 and 1500 Mpa. The compacted body is then heated to a temperature sufficient for achieving stress relief and recrystallization of the iron base material.