Medical instrument with a flexible sealing system via spherical heads
First Claim
1. 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 said shaft of said other instrument 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 thereof, a second end of said slats, opposite to said first end, being connected to said seal in an area of said opening, said slats forming said expansion cone narrowing from a proximal to a distal end thereof, wherein said slats are connected at its first ends to said annular body via spherical heads engaging into corresponding openings in said annular body, wherein said second end of said slats of said expansion cone are connected with a form fit to a socket provided at an edge of said opening in said seal.
1 Assignment
0 Petitions
Accused Products
Abstract
A medical instrument has a cannula and a seal disposed in the cannula. An expansion device serves for expanding an opening in the seal for guiding shafts of other instruments of greater diameter in a sealed manner through the expanded opening. The expansion device has an expansion cone with a plurality of slats mounted pivotably on an annular body at a first end thereof, a second end of the slats being connected to the seal in an area of the opening. The slats are connected at its first ends to the annular body via spherical heads engaged into corresponding openings in the annular body.
8 Citations
25 Claims
- 1. 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 said shaft of said other instrument 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 thereof, a second end of said slats, opposite to said first end, being connected to said seal in an area of said opening, said slats forming said expansion cone narrowing from a proximal to a distal end thereof, wherein said slats are connected at its first ends to said annular body via spherical heads engaging into corresponding openings in said annular body, wherein said second end of said slats of said expansion cone are connected with a form fit to a socket provided at an edge of said opening in said seal.
Specification