US Patent No. 10,987,123

SURGICAL INSTRUMENTS WITH ARTICULATING SHAFTS


Patent No. 10,987,123
Issue Date April 27, 2021
Title Surgical Instruments With Articulating Shafts
Inventorship Michael P. Weir, Blanchester, OH (US)
Joseph B. Kraimer, Mason, OH (US)
Frederick E. Shelton, IV, Hillsboro, OH (US)
Stephen J. Balek, Springboro, OH (US)
Zhifan F. Huang, Mason, OH (US)
Sora Rhee, Pennsylvania Furnace, PA (US)
Carl J. Draginoff, Jr., Mason, OH (US)
Assignee Ethicon LLC, Guaynabo, PR (US)

Claim of US Patent No. 10,987,123

1. An articulatable surgical instrument comprising:an end effector comprising an ultrasonic blade;
a shaft extending proximally from the end effector along a longitudinal axis, wherein the shaft comprises:
a pivotable portion at a first position on the longitudinal axis proximal to the end effector, wherein the pivotable portion comprises a plurality of transverse spacer members;
a first rotatable member extending through the plurality of transverse spacer members parallel to the longitudinal axis, wherein the first rotatable member comprises a first natural bias extending in a first natural bias direction away from the longitudinal axis, and wherein the first natural bias direction of the first rotatable member varies with rotation of the first rotatable member;
a second rotatable member extending through the plurality of transverse spacer members parallel to the longitudinal axis and offset from the first rotatable member along a direction perpendicular to the longitudinal axis, wherein the second rotatable member comprises a second natural bias extending in a second natural bias direction away from the longitudinal axis, wherein the second natural bias direction of the second rotatable member varies with rotation of the second rotatable member, wherein the pivotable portion of the shaft is substantially straight when the first and second rotatable members are rotated such that the first natural bias direction and the second natural bias direction oppose one another and both the first rotatable member and the second rotatable member exert bias forces oriented radially outward from the longitudinal axis, and wherein the pivotable portion of the shaft articulates in a first direction away from the longitudinal axis when the first and second rotatable members are rotated such that the first natural bias direction and the second natural bias direction are aligned with one another both in the first direction; and
an ultrasonic waveguide extending through at least a portion of the shaft, wherein the ultrasonic waveguide comprises a bendable portion at the pivotable portion of the shaft.