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US 2021/0259692 A1Published application
Surgical Stapling Device With Two Part Knife Assembly
AssigneeCovidien LP
InventorJoseph Eisinger
Life of this patent
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Abstract
A stapling device is provided that includes a reload assembly and an anvil assembly. The anvil assembly supports a cut ring. The reload assembly includes a knife assembly that has a distal knife portion and a proximal knife portion that are separate from each other. The distal knife portion includes a cutting edge and is movable with the proximal knife portion from a retracted position to an advanced position into engagement with the cut ring. In the advanced position, the distal knife portion is retained by the cut ring to shield the cutting edge of the distal knife portion.
Claims20
A reload assembly comprising:
- a shell housing defining a cavity and having a proximal portion and a distal portion;
- a staple cartridge supported on the distal portion of the shell housing, the staple cartridge supporting a plurality of staples;
- a staple pushing member movable within the shell housing between an advanced position and a retracted position to eject the plurality of staples from the staple cartridge, the staple pushing member defining a longitudinal bore;
- a knife carrier supported within the longitudinal bore of the staple pushing member, the knife carrier being movable between retracted and advanced positions within the shell housing;
- and
- a knife assembly including a distal knife portion and a proximal knife portion, the proximal knife portion secured to the knife carrier and movable with the knife carrier as the knife carrier is moved between its retracted and advanced positions, the distal knife portion in abutting relation with the proximal knife portion, wherein the knife carrier is movable from its advanced position to its retracted position independently of the distal knife portion.
3 more elements
The reload assembly of claim 4, wherein the distal knife portion includes an annular cutting edge.
A stapling device comprising:
- a handle assembly;
- an adaptor assembly extending from the handle assembly, the adaptor assembly having a distal end portion;
- an anvil assembly including a cut ring;
- and
- a reload assembly supported on the distal end portion of the adaptor assembly, the reload assembly including:
- a shell housing defining a cavity and having a proximal portion and a distal portion;
- a staple cartridge supported on the distal portion of the shell housing, the staple cartridge supporting a plurality of staples;
- a staple pushing member movable within the shell housing between an advanced position and a retracted position to eject the plurality of staples from the staple cartridge, the staple pushing member defining a longitudinal bore;
- a knife carrier supported within the longitudinal bore of the staple pushing member, the knife carrier movable between retracted and advanced positions within the shell housing;
- and
- a knife assembly including a distal knife portion and a proximal knife portion, the proximal knife portion secured to the knife carrier and movable with the knife carrier between retracted and advanced positions as the knife carrier is moved between its retracted and advanced positions, the distal knife portion positioned in abutting relation with the proximal knife portion such that movement of the proximal knife portion to its advanced position moves the distal knife portion to an advanced position, wherein the knife carrier is movable from its advanced position to its retracted position independently of the distal knife portion.
8 more elements
A reload assembly comprising:
- a shell housing defining a cavity and having a proximal portion and a distal portion;
- a staple cartridge supported on the distal portion of the shell housing, the staple cartridge supporting a plurality of staples;
- a staple pushing member movable within the shell housing between an advanced position and a retracted position to eject the plurality of staples from the staple cartridge, the staple pushing member defining a longitudinal bore;
- and
- a knife assembly including a distal knife portion and a proximal knife portion, the distal knife portion in abutting relation with the proximal knife portion, wherein the proximal knife portion is movable from its advanced position to its retracted position independently of the distal knife portion.
2 more elements
Dependencies are inferred from the claim text.