Abstract: Devices providing ultrasonic clamped cutting using asymmetrical motion include a housing and ultrasonic waveguide. A longitudinal axis extends through the center of mass of the ultrasonic waveguide. An actuating assembly provides opposable movement of a clamp arm with respect to the cutting blade, the movement defining a vertical plane having a vertical axis orthogonal to both the longitudinal axis and a horizontal axis. An end-effector coupled to the ultrasonic waveguide includes a cutting blade that cuts using ultrasonic motion. The blade's center of mass may be offset from the longitudinal axis, providing motion of the blade in both the longitudinal and vertical axes concurrently. Excursion of the cutting blade in the direction of the horizontal axis that may be limited to less than 92%, and in the direction of the vertical axis of more than 8%, of an excursion of the cutting blade in the direction of the longitudinal axis.

Abstract: Ultrasonic devices having transducer assembly including a stack of alternating electrodes and piezoelectric elements. A mounting device having a first and second end is adapted to receive ultrasonic vibration from the stack and transmit it from the first to the second end. A bolt including a head and shaft is configured to threadedly engaged the mounting device. The transducer assembly includes a deformable pressure element having a central opening that permits insertion of the shaft therethrough, and has a convex side facing the bolt head and a concave side facing the stack in a non-deformed state, but, in a deformed state, applies compression forces to the stack based on the deformation. The deformable pressure element may alternately include a surface area, in its deformed state, substantially equivalent to the surface area of a piezoelectric element and/or a first and second beveled surface defining the concave side.