Tool assembly for surgical stapling device
2 Assignments
0 Petitions
Accused Products
Abstract
A tool assembly having a pair of jaws is disclosed. Each of the jaws has a proximal end and a distal end and the first jaw is movable in relation to the second jaw between a spaced position and an approximated position. First and second cam followers are supported on the first jaw. An approximation member is movable in relation to the first jaw and includes at least one cam surface positioned to engage the first and second cam followers. The approximation member is movable in relation to the first jaw to move the at least one cam surface in relation to the first and second cam followers to effect movement of the first and second jaws from the spaced position to the approximated position. The at least one cam channel is configured to approximate the distal ends of the first and second jaws prior to approximation of the proximal ends of the first and second jaws. In another preferred embodiment, the tool assembly includes an articulation and firing actuator. The articulation and firing actuator includes a flexible band having a first end portion extending at least partially through the body portion and through the cartridge assembly, a central portion extending from the first end portion operably associated with the dynamic clamping member and a second end portion extending from the central portion through the cartridge assembly and at least partially through the body portion to a position adjacent the first end. The articulation and firing actuator is operably associated with the tool assembly such that movement of either the first end portion or the second end portion of the flexible band proximally and independently of the other end portion effects pivoting of the tool assembly in relation to the body portion, and movement of both the first and second end portions of the flexible band simultaneously effects movement of the dynamic clamping member to eject the staples from the cartridge assembly.
144 Citations
36 Claims
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1-16. -16. (canceled)
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17. A tool assembly comprising:
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a pair of jaws including a first jaw and a second jaw, each of the jaws having a proximal end and a distal end, the first and second jaws being movable in relation to the other between a spaced position and an approximated position;
first and second cam followers supported on one of the first and second jaws; and
an approximation member including at least one cam surface positioned to engage the first and second cam followers, the approximation member being movable to move the at least one cam surface in relation to the first and second cam followers;
wherein the approximation member is movable to move the at least one cam surface in relation to the first an second cam followers to effect movement of the first and second jaws between the spaced position and the approximated position, the at least one cam surface being configured to approximate the distal ends of the first and second jaws prior to approximation of the proximal ends of the first and second jaws. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A surgical device comprising:
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a body portion defining a longitudinal axis;
a tool assembly including an anvil, a cartridge assembly housing and a plurality of staples and a dynamic clamping member, the anvil and cartridge assembly being movable in relation to each other between spaced and approximated positions, the dynamic clamping member being movable in relation to the anvil and the cartridge assembly to eject the staples from the cartridge assembly, the tool assembly being pivotally attached to the body portion and being pivotable in relation to the body portion from a position aligned with the longitudinal axis of the body portion to a position oriented at an angle to the longitudinal axis of the body portion; and
an articulation and firing actuator extending at least partially through the body portion and the tool assembly, the articulation and firing actuator being operably associated with the dynamic clamping member and the tool assembly and being movable in relation thereto to selectively pivot the tool assembly in relation to the body portion and move the dynamic clamping member in relation to the tool assembly to effect ejection of the staples from the cartridge. - View Dependent Claims (29, 30, 31, 32)
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33. A surgical device comprising:
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a tool assembly including a first jaw and a second jaw, each of the jaws having a proximal end and a distal end, the first jaw being movable in relation to the second jaw between a spaced position and an approximated position;
first and second cam followers supported on one of the first and second jaws; and
an approximation member including at least one cam surface positioned to engage the first and second cam followers, the approximation member being movable to move the at least one cam surface in relation to the first and second cam followers to effect movement of the first and second jaws between the spaced position and the approximated position; and
a dynamic clamping member operably associated with the first and second jaws and being movable in relation to the first and second jaws to actuate the tool assembly and to maintain a desired gap between the first and second jaws at a location adjacent the dynamic clamping member. - View Dependent Claims (34, 35, 36)
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Specification