Dema Engineering Company

Bruce Weber

Paul E Naslund

This backflow preventer includes a body having an upper portion providing an inlet and a lower portion providing an outlet. The body includes a backflow preventer having a nozzle communicating with the inlet, a passage communicating with the outlet and a diaphragm disposed between the nozzle and the passage. The diaphragm is maintained in the closed position by a resilient element and is movable under inlet water pressure from a closed position to an open position. The diaphragm is moved into the closed position by reverse back-up flow assisted by the resilient element and a relief gap is provided below the diaphragm to permit escape of reverse backflow.

Backflow preventer

This dispensing apparatus includes a shut-off valve having a magnetically actuated valve element. The valve element is moved into an open position by magnetic attraction from a magnet mounted to a movable actuator. The actuator is adapted to be raised by a liftable handle connected to the actuator or by application of an upward force applied by a bottle container to the actuator. In both cases, the valve element is moved vertically by the application of a vertical force to the actuator.

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Fenton, MO, United States of America

Bruce Weber