Self-cleaning pre-filter system
AssigneeLancer Partnership, Ltd.
InventorsMichael T. Romanyszyn, Robert S. Bosko
Life of this patent
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Abstract
A self-cleaning prefilter system generally includes a system inlet 11, a sediment filter 13 having a selectively openable drain port 18, a chemical injector 21, a pressure accumulator 28 having a upper chamber 31 in open fluid communication with the filter outlet 16, and a system outlet 12. A controller 33 in communication with a plurality of valves (V1, V2, V3) initiates a backwashing mode such that upon opening of the drain valve V3, fluid within the upper chamber 31 of the pressure accumulator is driven back towards the sediment filter to backwash the filter screen thereof. Contemporaneously, chemicals within the chemical injector 21 are driven along with the backwash flow via capillary 24.
Claims18
A self-cleaning pre-filter system, said system comprising:
- a system inlet;
- a sediment filter having a filter inlet in selective fluid communication with said system inlet, a selectively openable drain port and a filter outlet, said filter inlet and said drain port being separated from said filter outlet by a filter screen;
- a pressure accumulator having a first chamber in open fluid communication with said filter outlet and having a sealed second chamber containing a compressible medium, said first chamber and said second chamber being separated one from the other by a flexible diaphragm;
- a system outlet in selective fluid communication with said filter outlet and said first chamber;
- and
- a chemical injector between said filter outlet and said first chamber, whereby the interruption of fluid communication from the system inlet and to the system outlet and the opening of said drain port facilitates fluid communication from said first chamber back through said filter screen and to said drain port, and further whereby the chemical injector delivers chemical back through said filter screen and to said drain port during fluid communication from said first chamber back through said filter screen.
Dependencies are inferred from the claim text.