Anvil assembly with improved cut ring
First Claim
Patent Images
1. An anvil assembly comprising:
- a head assembly including a housing supporting an anvil plate having a plurality of staple deforming pockets and a cut ring assembly supported within the housing adjacent the anvil plate, the cut ring assembly including a body and a cover fastened to the body, the cover including a first layer formed of a first material having a hardness which allows penetration by a knife of a surgical stapler and at least one additional layer formed of a second harder material having a hardness to minimize penetration by a knife of a surgical stapler, wherein the at least one additional layer includes a second layer and a third layer, the second and third layers being formed of the second harder material to minimize penetration of the cut ring assembly by a knife of a surgical stapler.
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Accused Products
Abstract
An anvil assembly for use with a surgical stapler is provided. The anvil assembly includes a cut ring assembly having a body and a cover. The cover has a first layer of material having a first hardness to allow penetration by a knife of a surgical stapler and at least one additional layer of material having a second hardness greater than the first hardness to minimize penetration of the cover by a knife of a surgical stapler.
487 Citations
9 Claims
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1. An anvil assembly comprising:
a head assembly including a housing supporting an anvil plate having a plurality of staple deforming pockets and a cut ring assembly supported within the housing adjacent the anvil plate, the cut ring assembly including a body and a cover fastened to the body, the cover including a first layer formed of a first material having a hardness which allows penetration by a knife of a surgical stapler and at least one additional layer formed of a second harder material having a hardness to minimize penetration by a knife of a surgical stapler, wherein the at least one additional layer includes a second layer and a third layer, the second and third layers being formed of the second harder material to minimize penetration of the cut ring assembly by a knife of a surgical stapler. - View Dependent Claims (2, 3)
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4. An anvil assembly comprising:
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a head assembly including a housing supporting an anvil plate having a plurality of staple deforming pockets and a cut ring assembly supported within the housing adjacent the anvil plate, the cut ring assembly including a body and a cover fastened to the body, the cover including a first layer formed of a first material having a hardness which allows penetration by a knife of a surgical stapler and at least one additional layer formed of a second harder material having a hardness to minimize penetration by a knife of a surgical stapler, wherein the anvil plate and the cut ring assembly are annular and the cut ring assembly is positioned within a recess defined by the anvil plate, the head assembly further including a central post extending from the housing, the anvil plate and the cut ring assembly being positioned about the central post; and an anvil center rod extending outwardly from the central post, wherein the anvil center rod includes a plurality of flexible arms spaced from the central post, the flexible arms being adapted to releasably engage a surgical instrument. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification