Patent ID: 8968312
Filing Date: 2015-03-03
Classification: A61B

Abstract:
1. An endoscopic surgical instrument for treating tissue, comprising: a housing having a shaft extending therefrom, the shaft including at least an articulating portion and an end effector; a first casing connected to and rotatable with a proximal end of the shaft; an internal frame housed within the first casing; a plurality of posts supported by the internal frame and connected on their distal ends to at least one drive wire; a second casing connected to the first casing and rotatable therewith; a first pair of threaded shafts housed within the second casing, each threaded shaft of the first pair of threaded shafts being connected to a respective proximal end of a post of the plurality of posts; a first electric motor driving a first gear, the first gear interfacing with the first pair of threaded shafts such that the first pair of threaded shafts rotate in the same direction as one another; a second electric motor driving a second gear, the second gear configured to cause the shaft of the housing and the first and second casings to rotate about a common axis; wherein driving the first gear in a first direction causes the articulating portion of the shaft to articulate in a first plane.