Water Lifted By Compressed Air
For Municipal, Manufacturing, Irrigation or Other Water Supply

of the head of water and the escape of part of its contents, the air and water will pulsate above and below the mouth or exit of the eduction pipe, and portions escape thereinto alternately. 5. The combination with a well, of a pressure chamber closed at its upper end and permanently open at its lower end to permit free inflow of water, of a delivery pipe arranged within the pressure cham- ber and extending below the normal water level, and open at its lower end to receive the water from the well, and an independent source of compressed gas connected with the upper end of the pressure-chamber, whereby under a constant flow of gas under pressure from the inde- pendent source into the pressure chamber the gas and liquid will pul- sate about the lower end or mouth of the delivery pipe, alternately entering the same. 6. In an air-lift pump the combination of a delivery pipe extend- ing below the normal water level, a pressure chamber inclosing part of said delivery pipe and extending down below the lower or inlet end thereof, and permanently open at its lower end to receive the water connections between the upper part of the pressure chamber and an independent supply of air under pressure, and means for regulating the pressure of air supplied to the pressure chamber. 7. In an air-lift pump the combination of a stationary delivery pipe formed with a contracted portion near its lower extremity, a pressure chamber surrounding said pipe, said chamber permanently open at its lower end to receive the water, and valveless connections between the pressure chamber and an independent source of com- pressed air at one end, and with the water at the other end, whereby the head or normal level of the water in the well and the pressure of air loom the tank will always oppose each other in the pressure cham- ber, causing them to pulsate above and below the lower end of the delivery pipe, air and water escaping thereinto in alternation. 8. In an air-lift pump, the combination of a delivery pipe formed with a contracted portion near its lower encl or mouth, a pressure chamber surrounding said pipe and permanently open at its lower end to receive the liquid and supplying compressed air thereto from above in alternation with the supply of liquid, and connections between the pressure chamber and an independent source of compressed air. 43