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Stuck threaded member extractor tool and extraction methods

United States Patent

February 2, 2016
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
Disclosed is a tool having a tapered first portion configured to translate a rotational force to the stuck member, a second portion connecting with the first portion and configured to translate the rotational force to the tapered first portion, a planar tip at an end of the first portion and perpendicular to a central axis passing through the first portion and the second portion, a plurality of left-handed splines extending helically around the central axis from the tip toward the second portion, a driver engaged with the second portion and configured to receive a third rotational force from a mechanical manipulator, and a leak seal connected to the driver and configured to form a seal around the stuck member and at least a portion of the driver and prevent gases opposite the stuck member from escaping.
Roscosky; James M. (Irwin, PA), Essay; Shane M. (Greenock, PA)
U.S. Department of Energy (Washington, DC)
14/ 107,820
December 16, 2013
NOTICE OF GOVERNMENT RIGHTS The United States Government has rights in this application and any resultant patents claiming priority to this application pursuant to contract DE-AC11-98PN38206 between the United States Department of Energy and Bechtel Marine Propulsion Corporation Knolls Atomic Power Laboratory.