Abstract: A heat exchange device, for allowing the exchange of heat between a first medium and a second medium, using a coaxial double tube. The coaxial double tube includes an outer tube, and an inner tube which extends through the outer tube. The inner tube has an inner conduit for allowing a first medium to travel therethrough, and an outer conduit is formed between the inner tube and outer tube for allowing a second medium to travel therethrough while remaining physically isolated from the first medium. The outer tube is made of plastic, and the inner tube is made of metal, which allows heat to be transferred between the first medium and second medium and allows the tube to be selectively bent into a coil to minimize space for the heat exchange device.

Abstract: A pump, for moving a pumped fluid using a pumping fluid, comprising an outer housing defining an interior volume. A compressible main tube, having an interior space, is located within the outer housing. Inlet and exit valves, both having internal check valves, are in communication with the interior space of the compressible main tube. The outer housing is selectively filled with pressurized pumping fluid through a drive intake to compress the main tube and force pumped fluid contained therein out through the exit valve. The pressurized pumping fluid is then released through a bleeder valve to relieve pressure upon the main tube, allowing it to expand, and causing it to draw pumped fluid into its interior space through the inlet valve. Reiteration of these steps is controlled by a solenoid valve which selectively allows or prevents flow of the pumping fluid through the drive intake into the internal volume of the outer housing.

Abstract: A compact distilled water system for home, marine, and laboratory use which includes a closed circuit that provides high pressure water for dispensing water to remote locations and that also creates, in conjunction with an eductor, a partial vacuum in the evaporator tank to permit boiling and steam generation therein below atmospheric pressure.