Patent ID: 9056359
Filing Date: 2015-06-16
Classification: B23D,B25B

Abstract:
1. An apparatus for removing a lock bolt collar from a lock bolt extending from a joint surface, said apparatus comprising: an outer sleeve comprising a tubular conduit running through said outer sleeve from a proximal end to a distal end thereof, and a joint engagement surface at the distal end for contacting said joint surface, the joint engagement surface having a tapered inner surface at an inner edge of the joint engagement surface; and a hollow inner sleeve disposed within said tubular conduit and comprising a proximal end, a distal end, an interior surface and an exterior surface, said inner sleeve having a plurality of fingers in the distal end of the inner sleeve, each of the fingers comprising a tooth positioned proximate a distal end of the fingers to extend horizontally across the entire distal end of each of the fingers on said interior surface for gripping and pulling the lock bolt collar, and a ridge disposed on said exterior surface for contacting the tapered inner surface of the joint engagement surface of the outer sleeve to push said fingers in a radially inward direction, the inner sleeve configured to move from an extended position in which the fingers extend out of the outer sleeve to a retracted position in which the fingers retract into the outer sleeve and the distal end of the inner sleeve is beyond the joint engagement surface at the distal end of the outer sleeve; the tooth in each of the fingers having a lower surface disposed at a tooth angle of 25-60 degrees measured from the interior surface; the ridge in each of the fingers having a lower surface disposed at a ridge angle of 25-60 degrees measured from the exterior surface of the inner sleeve; and the tapered inner surface of the joint engagement surface having an angle corresponding to the ridge angle.