#$%^&*AU2019201167A120190912.pdf#####ULTRASONIC SURGICAL INSTRUMENT WITH TORQUE ASSIST FEATURE ABSTRACT An ultrasonic surgical instrument (10), comprising: a housing (110) defining a proximal opening； an ultrasonic transducer assembly (320) extending through the proximal opening into the housing (110), the ultrasonic transducer assembly (320) including a horn (324) disposed within the housing (110), the horn (324) having a first engagement member disposed at a free distal end thereof, the ultrasonic transducer assembly (320) further including an inner housing extending through the proximal opening and an outer knob (374) disposed externally of the housing (110) and slidably positioned about the inner housing in fixed rotational orientation relative thereto, the outer knob (374) selectively translatable relative to the inner housing between a proximal, unlocked position, wherein the outer knob (374) is proximally-spaced from the housing (110), and a distal, locked position wherein the outer knob (374) is engaged with the housing (110) to thereby rotationally lock the ultrasonic transducer relative to the housing (110)； and a waveguide (230) defining a blade (234) at a distal end and a second engagement member at a proximal end, the second engagement member configured to releasably engage the first engagement member to thereby engage the waveguide (230) with the ultrasonic transducer assembly (320).1/6 000 00 rnl 00 0nr
