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:
Nov. 03, 1987
Filed:
May. 12, 1986
Applicant:
Inventor:
Francis J Fuchs, Jr, Naples, FL (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21C / ;
U.S. Cl.
CPC ...
72 45 ; 72 60 ; 72254 ; 72257 ; 72262 ; 72264 ; 722735 ;
Abstract
Pressurized fluid, pressurized in excess of the yield strength of a billet or rod, is communicated to the exterior of a piercing punch during piercing of the billet or rod to produce tubing, the pressurized fluid is provided to the exterior of the piercing punch during piercing to provide forced lubrication between the piercing punch and the billet or rod to reduce friction therebetween; such communication of pressurized fluid is also for causing self-centering of the piercing punch with respect to the billet or rod during piercing to produce tubing of uniform wall thickness.