US Patent 11974773 Latchless obturator with interference fit feature

A surgical access device includes a cannula assembly and an obturator. The obturator is configured to removably couple with the cannula assembly along a central axis of the cannula assembly to facility inversion of the surgical access device through a body wall of the patient. The obturator includes an elongated shaft extending along a longitudinal axis, a tapered distal tip located at a distal portion of the elongated shaft, and an obturator head located at a proximal portion of the elongated shaft. The obturator head includes an interference fit feature capable of inhibiting proximal movement between the obturator and the cannula assembly via a frictional force against a surface of the cannula assembly.