Patent ID: 8038889
Filing Date: 2011-10-18
Classification: B01D,E03F,Y10T

Abstract:
1. An automatic screen cleaning apparatus comprising: a. a housing for containing a liquid, the housing provided with a liquid inlet, a liquid outlet and a screen member; b. the screen member defining at least one aperture therethrough; c. an orifice plate defining an orifice in fluid communication with the liquid outlet of the housing; and d. a float member received within the housing, the float member comprising a rake member having one or more protrusions, the or each protrusion aligned with a respective aperture defined by the screen member, wherein the float member is moveable relative to the screen member in dependence upon variations in the volume of liquid received within the housing such that the float member obstructs the orifice of the orifice member to varying amounts in dependence upon the position of the float member within the housing.