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:
Dec. 06, 1983
Filed:
Jul. 02, 1981
Applicant:
Inventor:
Clemens Halene, Duesseldorf, DE;
Assignee:
Mannesmann Aktiengesellschaft, Duesseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72 69 ; 72 85 ; 72105 ;
Abstract
A tubular blank is held in a bed, heated on one end, which is then rolled into a semisphere with an integral nipple; an adjacent portion of the blank is subsequently heated and stretch-formed by rolling to obtain a spherical continuation of the semisphere, being continued in a cylindrical portion, preferably with a stepped-down section. The remainder of the blank is then cut off.