Abstract: A vapor compression type refrigerator system which utilizes a liquid pump and an eductor to reduce compressor power conmsumption and thereby achieve exceptionally high coefficient performance values. The system is useful for air conditioning or for refrigeration in residential and commerical type buildings and is convertible to heat pump operation.

Abstract: A jet pump macerator pump sewage handling system which provides a unique waste control system for use in mobile units such as passenger trains and ships in which multiple toilets are connected to a transfer manifold pipe which communicates with a non-clogging jet pump which is formed with a venturi and through which liquid material is driven by a macerator pump. Waste material from the toilets is drawn by the jet pump through the transfer manifold pipe and discharged into the retention tank. The macerator pump withdraws material from the retention tank, grinds it and discharges it back into the retention tank. The macerator pump has a self-cleaning feature in that it reverses and cleans itself whenever a loss in discharge pressure due to excessive solids loading is sensed. The transfer manifold pipe is virtually free from clogging due to the action of an air induction valve which keeps waste material in the manifold pipe moving without allowing it to accumulate.

Abstract: A compact continuous flow energy efficient gas fired water heater/boiler for use in residential, commercial and industrial buildings wherein cold water enters the heater and flows downward through an outer annulus and then rises up through an inner annulus around a central gas flue, and wherein combustion gas flows upward through the central flue and then downward through a set of heat-conductive tubes and finally upwardly through the middle annulus to the exit. Air flow blower provides draft. The burner is capable of burning gas at widely varying rates of gas flow and is regulated by a gas modulator valve approximately proportional to the rate of hot water usage and the force for the gas modulator is generated by an orifice type differential pressure generator in the inlet water pipe.

Abstract: A novel ball valve type purging device for a tank train ball valve purging device wherein a one-way valve is connected in an upper portion of a long vertical interconnecting pipe between adjacent cars of a string of tank cars so as to let gas pass from the long vent pipe into the top of the tank car and eliminates or minimizes the necessity to blow gas or air through the car commodity during purging of the interconnects and greatly reduces the pressure and quantities of purge gas required. The structure of the invention effectively eliminates the limitation on the length of a string of cars due to the purging requirements and the reduction of the quantity of purge gas substantially reduces the cost of purging particularly wherein inert or bottled gas such as nitrogen is utilized.