Endoscope insertion cannula assembly
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United States of America Patent
Stats
-
Nov 5, 1985
Grant Date -
N/A
app pub date -
Oct 24, 1983
filing date -
Oct 24, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cannula including a guide and a cam housing rotatably supported about the guide into which a trocar obtuator and an endoscopy instrument may be inserted. A tapered proximal surface of the guide and a cooperating pin on the instrument rotate the instrument into proper rotational alignment. An axial slot extending from the distal end of the taper and a cooperating axial slot in the cam housing are aligned so that as the pin continues to slide axially into the cannula, the pin will interfere with a cam surface projecting from the side of the cam housing wall to rotate the cam housing out of the way as the pin proceeds further down the slot until the pin drops behind the cam surface into a pin retaining area. Thus, the instrument may be easily slid into the cannula, and through the action of the cam housing and guide, is held in proper axial, rotational and sealing alignment.
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