Patent ID: 6016920
Filing Date: 2000-01-25
Classification: B01D,B07B,E02B

Abstract:
Apparatus for cleaning debris from a screen facility positioned in a channel, said apparatus comprising:said screen facility having at least one upper end and at least one bottom end;a rake facility having tines for engaging said screen facility to move the debris toward and past said at least one upper end of said screen facility to remove the debris from said screen facility, said rake facility being movable past screen stations designating the location at which said rake facility is positioned relative to said screen facility; anda drive for moving said rake facility relative to said screen facility in a plurality of cleaning cycles, the plurality of cycles including a first cleaning cycle and next cleaning cycles to occur temporally after the first cycle; in the cleaning cycles said rake facility being effective to attempt to move the debris from one of said stations at which said rake facility engages said screen facility toward said at least one upper end of said screen facility and to remove the debris from said screen facility, said drive comprising:a next station register indicating the one of said stations at which said rake facility is to engage said screen facility in one of the next cycles after the first cycle; anda controller for causing said rake facility to engage said screen facility at said station indicated by said next station register.