| 摘要 |
PURPOSE: To increase the pressure in a cylinder having a cylindrical filter so that contamination particles may be automatically removed from the filter by vertically moving this cylinder by the pressure of pressurized fluid. CONSTITUTION: The fluid to be filtered enters the filter 10 from an inlet port 14 so as to downwardly move a filter cartridge piston surface 66. The fluid flows from an escape slot 120 between the piston surface 66 of the cartridge 62 and a second sleeve 60 to fill a reservoir 24. Next, the fluid passes filter media 82 and holes 78 and fills a chamber 122, thereby lowering the piston 92 and returning a first sleeve 48 to its home position. At the time when the first sleeve is again depressed by the pressure of the filter fluid, the size of the chamber 122 is reduced and compressed and, therefore, the contaminants accumulated on the outside surface 124 of the filter media 82 are removed.
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