Method and apparatus for reverse flow water softener regeneration

Claim 1

IN A WATER FILTER INCLUDING A TANK HAVING OPPOSITE ENDS, SAID TANK BEING ADAPTED TO HOLD A BED OF WATER FILTERING GRANULES BETWEEN SAID ENDS, A WATER PIPE LEADING INTO ONE END OF SAID TANK AND A ARETICULATED FILTER THEREFOR, A SERVICE OUTLET FORTHE OTHER END OF SAID TANK, A SOURCE OF REGENERATING MATERIAL, CONDUIT MEANS CONNNECTING SAID SOURCE OF REGENERATING MATERIAL WITH SAID OTHER END OF SAID TANK, SUPPLY MEANS FOR WATER TO BETREATED, SAID WATER NORMALLY CONTAINING SEDIMENT AS WELL AS OTHER UNDESIRABLE IMPURITIES, A WASTE PIPE, AND A FLUID CONTROL SYSTEM CONNECTED TO SAID SUPPLY MEANS, SAID SOURCE, SAID WASTE PIPE AND SAID WATER PIPE INCLUDING VALVE MEANS SWITCHABLE BETWEEN A FIRST CONDITION ESTABLISHING A SERVICE FLUID FLOW CIRCUIT FROM SAID SOURCE THROUGH SAID WATER PIPE AND SAID RETICULATED FILTER INTO SAID ONE END OF SAID TANK AND THENCE THROUGH THE BED AND OUT THE SERVICE CONNECTIN, AND A SECOND CONDITION IN WHICH A REGENERATING FLUID FLOW CIRCUIT IS ESTABLISHED INCLUDING SAID SOURCE OFREGENERATING MATERIAL, THENCE THROUGH SAID CONDUIT MEANS INTO THE OTHER END OF THE TANK, THENCE THROUGH THE BED, THENCE THROUGH THE RETICULATED FILTER AND WATER PIPE AND THENCE OUT THE WASTE PIPE, THE IMPROVEMENT WHICH COMPRISES VALVE CONTROL MEANS INCLUDING AN ENERGIZING CIRCUIT FOR PERIODICALLY SWITCHING SAID VALVE MEANS FROM SAID FIRST CONDITION TO SAID SECOND CONDITION FOR APERIOD OF OVER-ALL DURATION CORRESPONDING TO THE TIME REQUIRED FOR SAID SAID SEDIMENT THEREFROM THROUGH SAID RETICULATED FILTER AND WATER PIPE AND THENCE OUT SAID WASTE PIPE, AND MEANS ACTUATED BY SAID ENERGIZING CIRCUIT FOR SWITCHING SAID VALVE MEANS BACH FROM SAID SECOND CONDITION TO SAID FIRST CONDITION FOR A SERIES OF INTERVALS SPACED FROM ONE ANOTHER THROUGHOUT SAID PERIOD AND OF DURATIONS BRIEF WITH RESPECT TO SAID PERIOD.