Patent ID: 7758603

Claim:
A surgical obturator adapted to penetrate a body wall, comprising: an elongate shaft extending along an axis between a proximal end and a distal end; and a non-expanding bladeless tip disposed at the distal end of the shaft having a conical surface forming proximally into an outer surface and extending distally to a blunt point, said outer surface having a pair of side sections separated by an intermediate section, wherein the side sections extend from the conical surface radially outwardly with progressive positions proximally along the axis, wherein the outer surface in radial cross section has a general configuration of a circle superimposed on a rectangle; the intermediate section includes a distal portion in proximity to the blunt point and a proximal portion in proximity to the shaft; the distal portion of the intermediate section being twisted in a first radial direction; and the proximal portion of the intermediate section being twisted in a second radial direction opposite the first radial direction.