Liquid purification or separation – Flow – fluid pressure or material level – responsive – Prefilt deverting to drain by prefilt accumulation
Reexamination Certificate
2005-07-05
2005-07-05
Pham, Minh-Chau T. (Department: 1724)
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Prefilt deverting to drain by prefilt accumulation
C210S104000, C210S135000, C210S171000, C210S195100, C210S512300, C210S513000, C209S138000, C209S139100, C209S140000, C451S087000, C451S088000, C096S415000, C096S416000
Reexamination Certificate
active
06913689
ABSTRACT:
Methods and apparatus for removing sediment from a liquid are provided. Pulses of pressurized air are directed into a conduit having an inlet disposed within a first liquid-containing vessel adjacent to (or within) the sediment to cause a slurry of liquid and sediment to flow through the conduit into a second vessel elevated above the first vessel. The slurry of liquid and sediment is allowed to drain from the second vessel into a third vessel that is positioned at an elevation lower than the second vessel. Liquid is drained from the third vessel (to another vessel or elsewhere) as sediment accumulates within the third vessel. The third vessel may be removed when accumulation of sediment therewithin reaches a predetermined amount. The accumulated sediment within the third vessel is removed and the third vessel is returned to service, or another empty vessel may be substituted therefor.
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Multiservice Procedures for Well-Drilling Operations, Field Manual No. 5-484, Navy Facilities Engineering Command Pamphlet No. 1065, Air Force Manual No. 32-1072, pp. 4-1-4-14 (Mar. 8, 1994).
Myers Bigel Sibley & Sajovec P.A.
Pham Minh-Chau T.
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