Patent ID: 6427509
Filing Date: 2002-08-06
Classification: A61B,B21C

Abstract:
A process for producing a distal end support member of an endoscopic treatment tool which comprises a drive mechanism holding groove portion and a sheath coupling portion, said drive mechanism holding groove portion having a slit of gap formed to extend from its distal end so as to hold a distal end treatment member drive mechanism in a movable fashion and said sheath coupling portion being formed in an annular shape so that it can be coupled to the distal end of a sheath, wherein said drive mechanism holding groove portion is formed by forging that portion of a cylindrical metal stock which is closer to its front end such that it is extruded through a pair of extrusion die openings in a first direction along its longitudinal axis into a nonconfining space, without conforming to an interior shape of a die mold cavity, to form a slit of gap in the middle whereas said sheath coupling portion is formed by forging that portion of said metal stock which is closer to its rear end such that it is extruded in an annular shape in a second direction opposite said first direction.