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. 08, 1980
Filed:
Dec. 19, 1978
Applicant:
Inventor:
Gerhard Lange, Reutlingen, DE;
Assignee:
Wafios, Maschinenfabrik, Wagner, Ficker & Schmid (GmbH & Co. KG), Reutlingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21L / ;
U.S. Cl.
CPC ...
59 31 ; 219 51 ;
Abstract
A chain welding machine has a first cam-operated linkage for rapidly moving psetting dies into and away from the ends of a link to be welded and a second hydromechanical linkage for applying upsetting force to the ends of the link. The upsetting force is controlled by hydraulic pressure which is regulated as a function of time by a cam-controlled pressure-limiting valve.