Abstract: A surgical shaving instrument (1) comprises a main body (2), a hollow elongate shaft (4) extending from the main body (2). The elongate shaft (4) defines an elongate inner open volume through the shaft. A tip portion (18) extends from the distal end region of the elongate shaft (4). A driveshaft extends through the elongate shaft (4) from the main body (2) to the distal end region of the elongate shaft (4). A cutter head (12) is attached to the driveshaft and located in the tip portion (10), the cutter head (12) extends at least partially out of the tip portion (18). The aperture of the tip portion (18) is defined by an inner edge, and a portion of the inner edge defines a fixed shaver blade (40) for the instrument, the fixed shaver blade (40) having a cutting angle which is substantially constant along the inner edge.

Abstract: An electrosurgical instrument that includes a hollow elongate shaft having a first axis and extending from a proximal end region to a distal end region. The instrument includes a tip portion at the distal end region that has a cavity. The cavity includes a base surface and a first retention surface extending away from the base surface in a direction towards the distal end region. The instrument also includes a conductor extending within the shaft and an electrode in the cavity and in electrical communication with the conductor. The electrode includes a first electrode element and a second electrode element in electrical connection and located adjacent one another. The second electrode element abuts and extends adjacent the first retention surface to restrain the movement of the electrode in a direction towards the outer surface of the tip portion and the proximal end region of the shaft.

Abstract: A surgical shaving instrument (1) comprises a main body (2), a hollow elongate shaft (4) extending from the main body (2). The elongate shaft (4) defines an elongate inner open volume through the shaft. A tip portion (18) extends from the distal end region of the elongate shaft (4). A driveshaft extends through the elongate shaft (4) from the main body (2) to the distal end region of the elongate shaft (4). A cutter head (12) is attached to the driveshaft and located in the tip portion (10), the cutter head (12) extends at least partially out of the tip portion (18). The tip portion (18) is of an electrically insulating ceramic material, and has an outer surface. An electrically conductive electrode is located on at least part of that outer surface.

Abstract: A sheet (200) adapted for fitting in a substrate processing showerhead (100), the sheet including a plurality of orifices (208, 210), wherein boundaries of at least some of the orifices (208) are substantially surrounded by an upstanding wall (212) formed of deformable material.

Abstract: A showerhead for substrate processing including a gas inlet leading to a gas reservoir. A faceplate including a plurality of orifices is fitted between the reservoir and a processing space. The showerhead further includes a sheet including a plurality of orifices, the sheet orifices being smaller in size than the minimum diameter of the faceplate orifices. The sheet is fitted in or on the showerhead such that the fluid passes to the process space from the reservoir via the sheet orifices.