Abstract: A catheter structure equipped with an adjustable self locating device comprises a flexible tube which has one end intended to be introduced into the cavity to be evacuated and provided with a hole. A duct associated with the flexible tube connects a diametral chamber to means for supplying and controlled discharging of a pressurised fluid. The diametral chamber consists of a circular rim portion concentric with the flexible tube and defined by a membrane which forms a single surface zone of said flexible tube without diametral chamber, in which said hole is formed.

Abstract: An electrolyte-activated battery, particularly for generating electric energy for the propulsion of underwater systems, and presenting a reservoir, an electrochemical cell, and a system for forming and circulating the electrolyte between the reservoir and the electrochemical cell; the electrolyte forming and circulating system presenting an inlet conduit communicating with the outside environment, a circulating pump, a device for regulating the temperature of the electrolyte at the inlet of the electrochemical cell, and a gas separator located at the outlet of the electrochemical cell and presenting a liquid phase outlet, and a gaseous phase outlet connected to an outlet conduit; the system also presenting a switching device for selectively connecting the liquid phase outlet to the inlet conduit and the outlet conduit.

Abstract: An electrolyte-activated battery, particularly for generating electric energy for the propulsion of underwater systems, and presenting a reservoir, an electrochemical cell, and a system for forming and circulating the electrolyte between the reservoir and the electrochemical cell; the electrolyte forming and circulating system presenting an inlet conduit communicating with the outside environment, a circulating pump, a device for regulating the temperature of the electrolyte at the inlet of the electrochemical cell, and a gas separator located at the outlet of the cell and presenting a liquid phase outlet connectable to the circulating pump, and a gaseous phase outlet connected to an outlet conduit; the inlet and outlet conduits presenting respective closure members facing and rigidly connected to each other so that they are subjected to the same but opposite hydrostatic pressures, and which are movable between a closed position and an open position wherein they are housed inside the respective conduits.

Abstract: There is disclosed a protective device for endoscopists, in particular for urethral use, which comprises a plate-like screen, which can be arranged so as to encompass the eye-piece associated with the optical detecting element, to be introduced into the catheter, in order to display the operating field.

Abstract: A kidney-ureter catheter unit comprises a flexible catheter (2) provided with an introduction end (2a) of truncated conical form close to which radial drainage holes (3) are pierced. Within catheter (2) is slidably engageable a semi-rigid dilator mandrel (4) provided with an introduction end (4a) of truncated conical form and in turn slidably engaged by a semi-rigid guide element (12) having a rounded introduction end (12a). A spring (5) detachably fastens mandrel (4) to catheter (2) in an insertion condition with respect to each other in which the introduction ends (2a, 4a) of catheter (2) and mandrel (4) have the respective generators in alignment, so as to form a continuous frusto-conical surface.

Abstract: A retention catheter in which a closed forward end portion of the drainage tube is provided with a pair of resilient inflatable bags which serve to retain the catheter end in an established drainage position. The bags extend circumferentially about the tube in diametrical opposition and along the same length portion of the tube, with the circumferential extent of each bag being so limited as to define on the tube wall a pair of opposed oblong open windows through which fluid drainage occurs. One duct extends along the tube wall to carry fluid for inflating the bags, and another duct communicates the bags with each other to equalize their inflation.