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. 25, 2003
Filed:
Feb. 19, 2002
Applicant:
Inventor:
Thomas Waring, Cambridge, CA;
Assignee:
Babcock & Wilcox Canada Ltd., Cambridge, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 2/200 ; B21D 2/602 ; B21D 3/908 ;
U.S. Cl.
CPC ...
B21D 2/200 ; B21D 2/602 ; B21D 3/908 ;
Abstract
A hydraulic expansion mandrel for expanding tubes in a heat exchanger tube bundle into a tubesheet is formed from a non-metallic material, such a carbon fiber-reinforced material. The mandrel includes an elongated cylinder having a tip, a fluid supply end and a reduced diameter section. A pair of O-rings separates the reduced diameter section from the tip and fluid supply end of the elongated cylinder. An adjustment shim, located between a threaded collar and a locking stop collar, adjusts the length of the mandrel inserted into a tube.