Patent attributes
A rotation knob assembly, handle assembly including the same, and surgical instrument including the same are disclosed. The rotation knob assembly includes an outer knob defining a lumen and at least one groove configured to receive an indexing protrusion of an elongated assembly to rotationally fix the elongated assembly relative to the outer knob. An inner collar is disposed within a proximal lumen portion of the outer knob and rotatably engaged therewith. A plurality of ball bearing assemblies protrude radially inwardly into the proximal lumen portion of the outer knob. Each ball bearing assembly includes a head and a ball bearing captured within the head. Each ball bearing is received within a waist of the inner collar such that, upon rotation of the outer knob relative to the inner collar, the ball bearings roll about a floor of the waist of the inner collar.
