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US 5,092,482 AGranted
Sludge digesters with separate liquid chambers to buoy ballast members
AssigneeEnvirotech Corporation
InventorsJeffrey L. Wight, Lynn W. Cook
Life of this patent
Estimating the term…
Abstract
A sludge digester gas-holder is disclosed having a gas-holding cover with ballast members submergible in a liquid medium contained within a chamber circumscribing the upper portion of the tank wall and separate from the main tank cavity.
Claims11
A sludge digester gas-holder having a gas-holding cover structured to float on an envelope of gas having a variable volume and pressure comprising:
- a. a main tank portion for holding sludge, said tank having a bottom and upwardly projecting sidewall,
- b. a cover having a top and depending sideskirt structured to telescope in close relation external to the upwardly projecting sidewall of said main tank,
- c. ballast support means attached near the lower, external edge of said sideskirt,
- d. ballast means supported on ballast support means near the lower, external edge of said sideskirt,
- e. a buoyant liquid chamber at least partially integral with and externally circumscribing said main tank sidewall near the upper portion of said main tank sidewall to form a chamber capable of holding a depth of liquid substantially equivalent to the height of said cover sideskirt and having a width greater than about three feet, said chamber structured to separate liquid in said chamber from sludge in the main tank.
2 more elements
Dependencies are inferred from the claim text.