Patent ID: 6238407
Filing Date: 2001-05-29
Classification: A61B

Abstract:
A safety-shielded trocar, comprising:a trocar cannula;an inner cannula within said trocar cannula, wherein said inner cannula moves axially relative to said trocar cannula between an extended position and a retracted position;means acting on the rear end of said inner cannula for biasing said inner cannula to its extended position;means for locking within said trocar cannula, wherein said means for locking is movable between a first position that locks said inner cannula in its extended position and a second position that permits axial movement of said inner cannula to its retracted position; andmeans for latching within said trocar cannula wherein, upon the movement of said means for locking from its first position to its second position, said means for latching engages said means for locking to retain said means for locking in its second position until the axial movement of said inner cannula rearward relative to said trocar cannula disengages said means for latching from said means for locking.