FLUID FILTER (VERSIONS) AND ANTIDRAIN VALVE FOR SAID FILTER Russian patent published in 2012 - IPC B01D29/11 F02M37/22 

FIELD: process engineering.

SUBSTANCE: invention relates to fuel filters. Proposed filter comprises casing with inner thread for cup with outer thread to be secured thereon, said cup being made from transparent material to accommodate filtration element retained by cover that thrusts on cup flanges. In compliance with first version, filter comprises booster handle with spring to accommodate collar and collar support, and antidrain valve. In compliance with second version, filter casing comprises handle with spring to accommodate collar and collar support, antidrain valve, and heater secured on said casing. End trapezoidal seal is arranged between said casing and cup. In both cases, collar and support are secured on handle rod by lock washers on both sides while antidrain valve is secured on filter casing. Antidrain valve comprises case with flange joint, rubber valve with spherical surface, seat and valve support. Casing has three fuel outlet openings. Stiffening ribs are made on casing outer surface, Valve seat is fitted in the casing. Rubber valve is secured on support.

EFFECT: shorter engine start interval and longer life, better operating performances.

10 cl, 3 dwg