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, 1978
Filed:
Nov. 07, 1977
Applicant:
Inventor:
Wayne A Martin, Wilkens Township, Allegheny County, PA (US);
Assignee:
United States Steel Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72334 ; 72338 ; 72356 ; 72370 ;
Abstract
A die and cooperating parts for forging and trepanning large diameter couplings and a method of forging and trepanning such couplings. A single die is used with a series of cooperating inserts and a riser in performing all the various steps necessary to forge and trepan the coupling. The same die and riser with appropriate inserts also can be used in forging and trepanning couplings of a range of sizes.