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:
Aug. 22, 1995
Filed:
Jul. 28, 1993
Applicant:
Inventor:
Hans Vondracek, Breckerfeld, DE;
Assignee:
Fried. Krupp AG Hoesch-Krupp, Dortmund, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21F / ;
U.S. Cl.
CPC ...
72139 ; 72142 ;
Abstract
A method of manufacturing helical springs that are curved when unstressed from wire or rod heated to coiling temperature in one step. The spring is coiled on a mandrel that is curved to match the desired curvature of the finished spring.