Abstract: A method for determining motional branch current in an ultrasonic transducer of an ultrasonic surgical device over multiple frequencies of a transducer drive signal. The method may comprise, at each of a plurality of frequencies of the transducer drive signal, oversampling a current and voltage of the transducer drive signal, receiving, by a processor, the current and voltage samples, and determining, by the processor, the motional branch current based on the current and voltage samples, a static capacitance of the ultrasonic transducer and the frequency of the transducer drive signal.

Abstract: A towable conveyor for transporting and elevating articles and a method and system for towing a conveyor and conveying articles up inclines is provided. The conveyor system has an elevating carriage and a plurality of support elements for conveying articles up the conveyor. Specifically, the towable conveyor system comprises a conveyor having a support frame, a plurality of support elements, a drive end with a motor, and an idle end; an elevating carriage having a first end interconnected to the support frame of the conveyor, a second with two or more wheels, and a support member extending upwardly from the elevating carriage; a cable system for raising the conveyor into a position of use and for lowering the conveyor into a towing position; one or more locking mechanisms; and a hitch for connecting the conveyor to a rear end of a towing vehicle.

Abstract: The system and method permits the use of equipment that is located exterior to a container, such as a tank container liquid hydrocarbon material within which a sludge deposit has accumulated, and then inserted, as through an access opening in the side of the tank. In addition to other innovations, an improved hydraulic equipment positioning arrangement is provided, for both positioning, inserting and withdrawing the conduit structure and end effectors for accessing the sludge or sediment, which may include a leveling element preferably in the form of an hydraulic system that operates to move the assembly in a vertical plane as well as a rotary driven hydraulic system for driving the conduit structure along a long axis.