Abstract: A surgical end effector includes an ultrasonic blade and a jaw member. The blade is adapted to receive ultrasonic and electrosurgical energy and defines a distal face. The jaw member is movable relative to the blade from a spaced-apart to an approximated position for clamping tissue and includes a structural body having a body portion and a distal cap portion. The distal cap portion defines an electrode that receives electrosurgical energy. The jaw member further includes a jaw liner engaged within the body portion and extending therefrom towards the blade such that, in the approximated position, the jaw liner contacts the blade to define a gap distance between the electrode and the distal face to facilitate bipolar electrosurgical tissue treatment upon conduction of bipolar energy between the electrode and the distal face and through tissue in contact therewith.

Abstract: A device for cleaning compacted clay, fine gravels, sand, and other blocking agents from the inside of drill stems or drill bits. The device cleans away the unwanted matter by use of concentrated streams of high pressure liquid traveling at very high velocity aimed at the unwanted matter so as to erode it away. The device has one compressed gas cylinder attached to a liquid reservoir through a pressure regulating valve so as to keep the liquid in the reservoir under a constant pressure. The liquid is emitted through a nozzle containing many small holes through a pressure actuated valve. This assembly is disposed within a casing which forms a part of the drill string with the drill bit at one end of the casing. The nozzle extends to within a short distance of the drill bit.