Abstract: An electrosurgical smoke evacuation pencil includes a handle housing having a proximal end portion and a distal end portion, the handle housing defining a first lumen therethrough. The electrosurgical pencil also includes a nozzle disposed within the first lumen and defining a second lumen, the nozzle being movable relative to and within the handle housing and extending proximally past the proximal end portion of the handle housing. The electrosurgical pencil may further include a swivel connector coupled to the distal end portion of the handle housing, the swivel connector configured to couple to a suction source. The electrosurgical pencil includes a hub assembly securedly disposed within the second lumen, the hub assembly including a conductive tube configured to couple to a source of electrosurgical energy, and an electrode slidably disposed within the conductive tube, the electrode being movable relative to and within the conductive tube.

Abstract: An electrosurgical smoke evacuation pencil includes a handle housing having a proximal end portion and a distal end portion, the handle housing defining a first lumen therethrough. The electrosurgical pencil also includes a nozzle disposed within the first lumen and defining a second lumen, the nozzle being movable relative to and within the handle housing and extending proximally past the proximal end portion of the handle housing. The electrosurgical pencil may further include a swivel connector coupled to the distal end portion of the handle housing, the swivel connector configured to couple to a suction source. The electrosurgical pencil includes a hub assembly securedly disposed within the second lumen, the hub assembly including a conductive tube configured to couple to a source of electrosurgical energy, and an electrode slidably disposed within the conductive tube, the electrode being movable relative to and within the conductive tube.

Abstract: Method for seismic prospecting using counter-rotating (207-208) eccentric-mass (201, 202) vibrator (CREMV) technology adapted as vibrator sources for seismic prospecting to produce controlled sweeps, as in the manner used in modern seismic prospecting, but with large forces at low frequencies, e.g. forces >275 kN at frequencies between 1 and 5 Hz. This is achieved by adapting the CREMV to enable rotational frequency and the eccentricity (205, 206) of the masses relative to their rotation axes (203-204) to be varied independently and simultaneously, and by designing the CREMV such that the radius of rotation of the center of mass of each rotating mass is on the order of 50 cm or more. The low frequency data obtained from such a seismic source enables improved detection and resolution of subsurface structures and better determination of subsurface properties.

Abstract: Method for seismic prospecting using counter-rotating (207-208) eccentric-mass (201, 202) vibrator (CREMV) technology adapted as vibrator sources for seismic prospecting to produce controlled sweeps, as in the manner used in modern seismic prospecting, but with large forces at low frequencies, e.g. forces >275 kN at frequencies between 1 and 5 Hz. This is achieved by adapting the CREMV to enable rotational frequency and the eccentricity (205, 206) of the masses relative to their rotation axes (203-204) to be varied independently and simultaneously, and by designing the CREMV such that the radius of rotation of the center of mass of each rotating mass is on the order of 50 cm or more.