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:
Jun. 05, 1990
Filed:
Jan. 17, 1989
Applicant:
Inventor:
Anthony A Duerring, Kennewick, WA (US);
Assignee:
Sandvik Special Metals Corp., Kennewick, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ; B21B / ;
U.S. Cl.
CPC ...
72208 ; 72214 ;
Abstract
A method and apparatus for loading hollow workpieces into a pilgering mill. The pilgering mill includes a reciprocating roll stand having a pair of metal forming rolls, a mandrel for insertion into a workpiece, and a mechanism for clamping the workpiece with various degrees of pressure. During loading and unloading of the mill, the workpiece is restricted from movement within the pilgering mill according to the various pressures applied to the workpiece by the clamping mechanism.