Hydro Systems Company

Richard E Haas

Thomas R Fegette

An anti-backflow eductor has a resilient sealing sleeve disposed on a water port defining blind end tube. The sleeve has a thinner wall cross section at a discharge end to enhance sealing while facilitating increased water flow. The ports in the blind end tube extend into a radial tube flange at the tube's inlet end to facilitate water flow out of the ports between the sleeve and tube. A tapered seat in the housing, together with cross bars in the vents, reduces the air vent cross section and relative motion between sleeve and housing to reduce sleeve wear. The eductor comprises an anti-backflow housing and a venturi housing coupled together for relative rotation but being inseparable under normal conditions to inhibit venturi use without the anti-backflow function of the anti-backflow housing.

Back flow preventing eductor

A peristaltic pump includes rotor-mounted rollers biased apart and having end steps for engaging corresponding cam surfaces on the pump body and cover to direct non-pumping rollers in a predetermined path and maintain a constant tube engaging pressure on the pumping rollers. Radial pumping loads are transmitted through the rollers and biasing springs to the cam surfaces via rolling contact rather than to the rotor and its drive shaft. Drive shaft bearings are eliminated. The diameter of the end steps is different and preferably less than that of the tube engaging roller surface. Rollers having varying end steps are provided to accommodate different pumping tubes, desired spring pre-loads and the like.

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Fairfax, OH, United States of America

Richard E Haas