Fluent material handling – with receiver or receiver coacting mea – Automatic control of flow cutoff or diversion – Level or overflow responsive
Reexamination Certificate
2007-08-21
2007-08-21
Douglas, Steven O. (Department: 3771)
Fluent material handling, with receiver or receiver coacting mea
Automatic control of flow cutoff or diversion
Level or overflow responsive
C141S095000, C222S054000
Reexamination Certificate
active
10939123
ABSTRACT:
In a system and method for ensuring that a liquid ring vacuum pump contains an optimum amount of barrier fluid the pump and a vessel for containing barrier fluid are set at respective levels such that, when the pump is at rest and the level of barrier fluid id at its optimum the level of the fluid in the vessel is at a convenient and pre-selected level with respect to the height of the vessel. In operation of the pump, if the level of the barrier fluid in the vessel departs from the pre-selected level as detected by detecting means, the vessel is automatically charge with barrier fluid from a barrier fluid supply, or barrier fluid is automatically discharged from the vessel, as appropriate. The correct level or quantity of barrier fluid in the pump is thereby maintained.
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Search and Examination Report for Great Britain Application No. GB0420046.5, dated Dec. 20, 2004.
Phipps John Mark Edward
Tahir Nadim
AES Engineering Ltd.
Douglas Steven O.
Myers Bigel & Sibley Sajovec, PA
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