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US 8,007,471 B2Granted
Medical instrument with laterally displaceable seal
AssigneeKarl Storz GmbH & Co. KG
InventorsMichael Sauer, Elmar Teichtmann
Life of this patent
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Abstract
A medical instrument has a cannula, a seal disposed in said cannula, said seal has an opening for guiding a shaft of another instrument through said seal in a sealed manner. An expansion device serves for expanding said opening in said seal. Said expansion device has an expansion cone comprising a plurality of slats mounted pivotably on an annular body at a first end, a second end of said slots opposite to said first end being connected to said seal in an area of said opening. A flexible casing structure is provided accommodating said seal and said expansion device.
Claims14
A medical instrument having
- a cannula
- a seal disposed in said cannula, said seal has an opening for guiding a shaft of another instrument through said seal and said cannula in a sealed manner,
- an expansion device for expanding said opening in said seal for guiding shafts of said other instruments of greater diameter in a sealed manner through said expanded opening, said expansion device having an expansion cone comprising a plurality of slats mounted pivotably on an annular body at a first end, a second end of said slats opposite to said first end, being connected to said seal in an area of said opening, and
- a flexible casing structure accommodating said seal and said expansion device;
- wherein said flexible casing structure is a flexible casing tube that is composed of a series of substantially parallel ring elements;
- and
- wherein said seal is designed as a pot-seal having said opening in a bottom of said pot, said pot-seal extending in a distal direction away from a distal end of said expansion cone.
4 more elements
Dependencies are inferred from the claim text.