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US 9,173,680 B2Granted
Seal for a trocar sleeve and such trocar sleeve
AssigneeKarl Storz GmbH & Co. KG
InventorDieter Lang
Life of this patent
Estimating the term…
Abstract
A seal for a trocar sleeve comprises a sealing body which, in the direction of a longitudinal center axis of the sealing body, has a first axial end and a second axial end and, between said first and second ends, an elastic sealing element which, in a radially inner area relative to the longitudinal center axis, defines a passage for an instrument. Said sealing element has a substantially tubular hollow space whose radially inner wall area annularly surrounds the passage, and said hollow space contains a fluid and and has a radially inner wall area annularly surrounding the passage, and a radially outer wall area on a radially outer side of the hollow space, the radially outer wall area having a wall thickness larger than a wall thickness of the radially inner wall area.
Claims21
A seal for a trocar sleeve, comprising:
- a sealing body having a longitudinal center axis, a first axial end and a second axial end in direction of said longitudinal center axis, and an elastic sealing element arranged between said first and second ends, said sealing element defining a passage for an instrument in a radially inner area relative to said longitudinal center axis,
- said sealing element further having a substantially tubular hollow space, said hollow space having a radially inner wall area that surrounds said passage about its complete circumference to form the passage for the instrument, and a radially outer wall area on a radially outer side relative to said longitudinal center axis of said hollow space, said radially outer wall area having a wall thickness larger than a wall thickness of said radially inner wall area,
- said sealing body further having at least one central support ring at least partially surrounding said hollow space on the radially outer wall area of said hollow space and arranged in a central area of said sealing body on the radially outer wall area between the first axial end and the second axial end, said support ring stiffening said sealing body, said sealing body being stiffened by at a first support ring extending about at least a partial circumference of said sealing body and arranged at said first axial end of the sealing body and a second support ring arranged at the second axial end of the sealing body,
- wherein said hollow space has an annular gap provided on a radially outer circumference of said hollow space between the first axial end and the second axial end, which extends about at least a partial circumference of said hollow space, and wherein said at least one central support ring is arranged in said annular gap and substantially closes said annular gap,
- wherein said first support ring and said second support ring are received in a recess of said sealing body, an external diameter of said first support ring and said second support ring is greater than a radially outer diameter of said recess.
2 more elements
A trocar sleeve comprising:
- a tubular shaft and a trocar head arranged at a proximal end of said tubular shaft, and comprising a seal, said seal comprising a sealing body having a longitudinal center axis, a first axial end and a second axial end in direction of said longitudinal center axis, and an elastic sealing element arranged between said first and second ends, said sealing element defining a passage for an instrument in a radially inner area relative to said longitudinal center axis,
- said sealing element further having a substantially tubular hollow space, said hollow space having a radially inner wall area that surrounds said passage about its complete circumference to form the passage for the instrument, and a radially outer wall area on a radially outer side, relative to said longitudinal center axis of said hollow space, said radially outer wall area having a wall thickness larger than a wall thickness of said radially inner wall area,
- said sealing body further having at least one central support ring at least partially surrounding said hollow space on the radially outer wall area of said hollow space and arranged in a central area of said sealing body on the radially outer wall area between the first axial end and the second axial end, said support ring stiffening said sealing body, said sealing body being stiffened by at a first support ring extending about at least a partial circumference of said sealing body and arranged at said first axial end of the sealing body and a second support ring arranged at the second axial end of the sealing body,
- wherein said hollow space has an annular gap provided on a radially outer circumference of said hollow space between the first axial end and the second axial end, which extends about at least a partial circumference of said hollow space, and wherein said at least one central support ring is arranged in said annular gap and substantially closes said annular gap,
- wherein said first support ring and said second support ring are received in a recess of said sealing body, an external diameter of said first support ring and said second support ring is greater than a radially outer diameter of said recess.
2 more elements
Dependencies are inferred from the claim text.