Self-cleaning fluid filtration system

A self cleaning fluid filtration system comprising:

• a tank having a bottom wall and a side wall extending upwardly from said bottom wall and together forming a fluid chamber, an inlet located in said bottom wall for receiving fluid to be filtered, a tube extending from said inlet upwardly into said chamber for directing said fluid upwardly through said tube, said tube having perforations therein for directing fluid within said tube to flow outwardly therefrom, a platform carried by said tube intermediate its ends and extending radially outward therefrom toward the inner surface of said side wall of said tank, a perforated rigid basket in said chamber surrounding said tube and having an open lower end having a peripheral edge mounted on the upper surface of said platform and a closed upper end located above the upper end of said tube, a collapsible fluid-permeable filter bag located in said chamber intermediate said tube and said basket and having an open lower end having a peripheral lip extending over the lower peripheral edge of said basket between said basket and the upper surface of said platform, said filter bag having an uncollapsed condition while fluid flows through said tube and then radially against said bag displacing said bag radially outward and upwardly against said basket so that fluid flows through said filter bag and then through said basket within said tank and a collapsed condition when fluid flow terminates whereupon said bag collapses causing dirt clinging to the inner surface of said filter bag to fall from the walls thereof by gravity forces toward the upper surface of said platform, a dirt compartment located in said tank below said platform, a dirt outlet in said platform intermediate said bag and said inlet so that dirt and unfiltered fluid may flow downwardly therethrough into said dirt compartment, a dirty fluid outlet extending from said dirt compartment permitting dirt and unfiltered fluid to flow outwardly therethrough from said dirt compartment, and a clean fluid outlet extending from said tank permitting filtered fluid to flow out of said tank.