Back flow preventing eductor
AssigneeHydro Systems Company
InventorRichard Haas
Life of this patent
Estimating the term…
Abstract
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.
Claims8
An anti-backflow eductor comprising:
- a blind-end barrel having water outlet port therein;
- a resilient sleeve disposed on said barrel and sealing said port;
- said sleeve being expansible to allow water under pressure to flow outwardly of said port;
- said sleeve having a first wall thickness and a second wall thickness thinner than said first wall thickness proximate a water discharge end thereof.
An anti-backflow eductor comprising:
- a blind-end barrel having an exterior surface and a water outlet port therein;
- a resilient sleeve disposed on said exterior surface of barrel and sealing said port;
- said sleeve defining a water discharge annulus about said barrel at a water discharge end of said sleeve;
- said sleeve being expansible away from said surface to allow water under pressure to flow outwardly of said port and between said sleeve and said exterior surface of said barrel;
- said sleeve having a first wall thickness and a second wall thickness thinner than said first wall thickness proximate a water discharge end thereof.
Dependencies are inferred from the claim text.