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:
Sep. 10, 2019
Filed:
Apr. 17, 2014
Bwxt Mpower, Inc., Charlotte, NC (US);
Bwxt Nuclear Operations Group, Inc., Lynchburg, VA (US);
Paul K. DeSantis, Bentleyville, OH (US);
Kevin J. Stambaugh, Willowick, OH (US);
Brett T. Goodyear, Euclid, OH (US);
Michael J. Edwards, Forest, VA (US);
Matthew W. Ales, Issaquah, WA (US);
BWXT mPower, Inc., Charlotte, NC (US);
BWXT Nuclear Operations Group, Inc., Lynchburg, VA (US);
Abstract
A control rod drive mechanism (CRDM) includes a lifting rod supporting a control rod and a holding mechanism comprising an electromagnetic circuit with magnetic poles drawn together when the electromagnetic circuit is energized to hold the lifting rod. The hold is released upon de-energizing the electromagnetic circuit. A translation mechanism linearly translates the lifting rod held by the holding mechanism. The holding mechanism may include a non-magnetic spacer between the magnetic poles that defines a gap between the drawn together magnetic poles. The translation mechanism may include latches configured to engage an upper end of the lifting rod, and the holding mechanism draws the magnetic poles together to hold the latches engaged with the upper end of the lifting rod. A four-bar cam assembly may be used to cam the latches closed in response to a vertical actuation force applied to the cam bars.