Abstract: An improved tempered water mixing system comprises a thermostatically operated main mixing valve for blending cold and hot water supplies during normal system operation, a secondary temperature-limiting flow-control device in the form of a thermostatic valve (also known as a pressure-regulator), with the thermostatic valve and the pressure regulating valve being connected to function as fail-safe devices so as to provide an uninterrupted discharge outflow at a substantial flow rate in the event of a malfunction of the main mixing valve.

Abstract: An apparatus for recovering fluid from a liquid formation includes a submersible pump for pumping fluid from the liquid formation. The submersible pump is coupled to an eductor defining a fluid member for receiving and transporting the fluid from the pump, and a fluid inlet in fluid communication with the fluid member for placement at a liquid-product layer in the formation. A probe assembly is coupled to the eductor for ensuring that the pump is inoperative when the fluid level in the formation is low. In operation, a motive force created by the upward flow of fluid pumped through the fluid member draws additional fluid into the fluid inlet from the liquid-product layer. The fluid entering the fluid inlet merges with the fluid flowing through the fluid member and is transported to a treatment facility.

Abstract: An expendable underwater vehicle for use in training naval forces in anti-submarine warfare in ocean waters, including shallow waters, is between about three to five feet in length and about five inches in diameter, and it includes various improvements which make successful operations in shallow ocean waters, and improved operation in all ocean waters, possible. The improvements include a one-piece nose cup which allows the expendable underwater vehicle to be air launched into shallow water, a scuttle plug which allows water to fill the expendable underwater vehicle after the vehicle is expended and drops to the bottom of the ocean, and rudders and elevators of increased surface area which improve controllability of the vehicle in the water.