Patent ID: 8496051

Claim:
Apparatus for forming an annular body of a fluidic material in a first annular region that is partially defined by a preexisting structure, the apparatus comprising: a first tubular member defining a first internal passage, wherein the outside surface of the first tubular member is adapted to partially define the first annular region; a second tubular member defining a second internal passage, the second tubular member extending within the first internal passage; a first axially-extending channel formed in the outside surface of the second tubular member; a first component extending from the first tubular member and into the first axially-extending channel, the first component resisting relative rotation between the first and second tubular members; a lock key at least partially disposed within the first axially-extending channel, the lock key comprising a bar member; and a spring radially disposed between the bar member and the second tubular member; wherein the second tubular member is movable, relative to the first tubular member and the first component, from a first position to a second position; wherein, when the second tubular member is in the first position, the first component engages the bar member to thereby energize the spring; and wherein, when the second tubular member is in the second position: the spring is sufficiently relaxed to radially position the lock key so that the first component is axially disposed between the lock key and a first surface of the second tubular member defined by the first axially-extending channel, and the axial position of the first component resists any further relative movement between the first and second tubular members while continuing to resist relative rotation between the first and second tubular members.