Surgical stapler with universal articulation and tissue pre-clamp
3 Assignments
0 Petitions
Accused Products
Abstract
A tool assembly for a surgical stapling device includes a channel member for supporting a staple cartridge therein and an anvil to deform a plurality of staples ejected from the staple cartridge thereagainst. The tool assembly also includes a sled which is movable to force the staples from the cartridge against the anvil to staple tissue disposed between the anvil and the staple cartridge. A dynamic clamping member is included which has a pin which movably engages the anvil and a flange which movably engages the channel assembly. The dynamic clamping member is mounted to and movable with the sled. The pin and the flange of the dynamic clamping member cooperating to oppose the forces associated With clamping and stapling tissue and also to maintain a substantially uniform gap between the anvil and the staple cartridge during stapling of the tissue.
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Citations
41 Claims
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1-25. -25. (canceled)
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26. A surgical stapler comprising:
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a tool assembly including a cartridge assembly having a plurality of staples and an anvil assembly, the anvil assembly being movable in relation to the cartridge assembly between open and approximated positions;
a shaft; and
an intermediate pivot member pivotally secured to the tool assembly about a first pivot axis and pivotally secured to the shaft about a second pivot axis, the first pivot axis being substantially orthogonal to the second pivot axis. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A tool assembly comprising:
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an anvil and a cartridge assembly, the cartridge assembly having a plurality of staples and being movable in relation to the anvil between an open position and an approximated position, the cartridge assembly and the anvil defining a tissue gap in the approximated position;
a clamp collar positioned adjacent the proximal end of the cartridge assembly and the anvil and being movable from a first position to a second position to effect movement of the anvil in relation to the cartridge assembly from the open position towards the approximated position; and
a dynamic clamping member movably positioned in relation to the anvil and the cartridge assembly, the dynamic clamping member being movable from a first position to a second position to define a maximum tissue gap between the anvil and the cartridge assembly adjacent the dynamic clamping member during ejection of the plurality of staples from the cartridge assembly. - View Dependent Claims (38, 39, 40, 41)
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Specification