Surgical stapling device with multiple stacked actuator wedge cams for driving staple drivers

摘要

A surgical stapling device (10,800) comprising an end effector (12,812) and a plurality of stacked actuatable wedge band sets (710,712,714,822,824,826). The end effector comprises an anvil (18,810) having a staple forming surface (202) and a staple cartridge (300,809) facing the staple forming surface of the anvil. The staple cartridge comprises a plurality of staples (222) and a plurality of staple drivers (330a,330b,370a,370b,1012,1014) moveable supportable within the staple cartridge. Each staple driver is in contact with one of the staples and configured such that when the staple drivers are actuated, the staple drivers drive the staples through the staple cartridge so that the staples are formed against the staple forming surface of the anvil. Each stacked wedge band set comprises at least two different-level wedge bands (720,722) for axially traversing the end effector. Each wedge band comprises a wedge cam (709) at its distal end for driving certain ones of the staple drivers when the wedge band is actuated. A first of the two wedge bands in the stacks rides on a second of the two wedge bands in the stacks such that the staple drivers are driven in successive stages by the at least two wedge bands when the wedge bands are driven in succession. The cumulative height of a first of the plurality of stacked wedge band sets is less than a cumulative height of a second of the plurality of stacked wedge band sets.