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:
Mar. 17, 2015
Filed:
Feb. 12, 2013
Applicant:
Caterpillar Inc., Peoria, IL (US);
Inventors:
Scott Christianson, Edelstein, IL (US);
Murray Mason, Ontario, CA;
Assignee:
Caterpillar Inc., Peoria, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 26/02 (2011.01); B21D 39/08 (2006.01); B21D 26/033 (2011.01);
U.S. Cl.
CPC ...
B21D 26/033 (2013.01);
Abstract
A method for hydroforming a tubular blank comprising the steps of at least partially closing the die portions of a die about a tubular blank, introducing a hydraulic fluid into the tubular blank at a first pressure, substantially closing the die portions about the tubular blank, partially opening the die while at least initially maintaining the pressure of the hydraulic fluid, and substantially closing the die portions at least a second time.