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. 24, 2014
Filed:
May. 27, 2011
Sun Doo Kim, Daejon, KR;
Chan Hyun Park, Daejon, KR;
IN Kyu Kim, Daejon, KR;
Ki Bum Park, Daejon, KR;
Seung Hwan Lee, Daejon, KR;
Sun Doo Kim, Daejon, KR;
Chan Hyun Park, Daejon, KR;
In Kyu Kim, Daejon, KR;
Ki Bum Park, Daejon, KR;
Seung Hwan Lee, Daejon, KR;
Kepco Nuclear Fuel Co., Ltd., Daejeon, KR;
Abstract
A pilger die and a pilger mandrel which are used to produce a dashpot tube which can be used in a nuclear fuel assembly having an outer diameter of 31.75 mm or less and an inner diameter 25.654 mm or less, by processing a reduced expression zirconium alloy tube in two pilgering processes (a first step pass and a second step pass) using a single pilgering apparatus. Furthermore, provided are methods of manufacturing the pilger die and the pilger mandrel, and the dashpot tube for the nuclear fuel assembly. The dashpot tube can be manufactured by the single pilgering apparatus provided with the pilger die and the pilger mandrel.