Patent ID: 6425910
Filing Date: 2002-07-30
Classification: A61B

Abstract:
A forceps instrument comprising:a sheath having a first end; an elongated maneuvering element slidably disposed in the first end of said sheath; said sheath having an axis; two jaw-pieces; at least one of said jaw-pieces being movable away from and toward the other of said jaw-pieces when said maneuvering element slides axially in the first end of the sheath, wherein said jaw-pieces have, in an extension of a part of the jaw-pieces, an arm extending progressively toward the axis of the sheath so as to form a first, internal, inclined surface extending progressively toward the axis and facing the latter, a second, external, inclined surface extending progressively toward the axis and facing an internal surface of the sheath; said arm having a convex excrescence which is slidable substantially against said internal surface of the sheath; said excrescence having a concave hollow cavity facing the axis; said sheath having, near its end beyond which said jaw-pieces extend, a transverse element against which said internal surface of said arm slides; said elongate maneuvering element terminating in a head housed in said concave hollow cavity so that, when said elongate maneuvering element is moved toward said first end of the sheath, it pushes said jaw-pieces back beyond the first end of the sheath, thus causing the internal surface of said arm, which slides over said transverse element, to pivot by a ramp effect, moving the at least one jaw-piece of the jaw-pieces away from the other jaw-piece, said movement away being permitted by the inclination of said external surface which protrudes from the internal surface of the first end of the sheath, said excrescence of the arm pivoting, during this movement, about said head while still being guided in said sheath, reverse movement of the maneuvering element causing the jaw-pieces to move closer by a reverse movement; and said transverse element including a passage having an axis substantially parallel to the axis of the sheath for accommodating an auxiliary tool between the two jaw-pieces.