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. 11, 1991
Filed:
Apr. 12, 1990
Applicant:
Inventors:
Donald E Miller, Adrian, MI (US);
Milan A Virsik, Adrian, MI (US);
Assignee:
Brazeway, Inc., Adrian, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ; B21D / ; B23P / ;
U.S. Cl.
CPC ...
294211 ; 72 58 ; 72 62 ;
Abstract
A method for fabricating metallic conduit and the like having exterior surface details such as beads, bulges and flares by inelastic flow of the metal of an extruded blank which does not exhibit the detail. The process comprises the steps of placing a blank in a high pressure die, injecting oil or other incompressible pressure-transmitting fluid into the blank, and using advancing core punches, pressurizing the fluid to cause the metal of the blank to flow into detail cavities of the die.