FILTER-MUD TRAP Russian patent published in 2007 - IPC B01D29/11 

FIELD: cleaning liquids from contaminants; separation of solid particles such as sand, clay, scale, rust from oil.

SUBSTANCE: proposed filter has cylindrical chamber provided with terminal gate whose flow diameter is equal to diameter of chamber, inlet and outlet branch pipes and filter element having cylindrical body which may be extended through terminal gate. Filter element is sectionalized: section located on side of inlet is coarse section which is made in form of perforated cylindrical ferrule with guide cone located inside it; outer diameter of lower base of this cone is equal to outer diameter of axle of subsequent section which is fine section made in form of stepped cartridge consisting of axle and ferrules fitted with screw guides forming cavities between ferrules and body for removal of contaminants; it changes to cleaned flow discharge section formed between extension of axle and ferrule of last stage of fine section cartridge; it is also provided with insulating circular cover of cavity between filter element body and ferrule of last stage of fine section cartridge which is connected by circular space between filter element body and cylindrical chamber with outlet branch pipe.

EFFECT: enhanced efficiency of cleaning; enhanced reliability.

4 cl, 9 dwg