Patent ID: 7318817

Claim:
An obturator comprising: an upper control housing having a bore therethrough, at least a portion of said bore having an internal threaded surface; a control shaft extending through said upper control housing bore having a first end and a second end and having an externally threaded surface complementary and engaging said internal threaded surface of said bore of said upper control housing; a wedging member attached at said second end of said control shaft; a first spreading leg pivotally mounted with respect to said upper control housing and carrying at least a first portion of an internal wedge conforming space surrounding said wedging member; a second spreading leg pivotally mounted with respect to said upper control housing and carrying at least a second portion of said internal wedge conforming space surrounding said wedging member, whereby movement of said wedging member causes said first and said second spreading leg to move angularly away from each other upon the turning of said control shaft.