Filter in domestic appliance

Claim 1

IN COMBINATION WITH A CLOTHES WASHING TUB ADAPTED TO CONTAIN FLUID AND HAVING A FIRST OPENING IN THE BOTTOM THEREOF, A SECOND OPENING IN THE SIDE THEREOF FARTHEST FROM SAID FIRST OPENING AND BENEATH THE LEVEL OF SAID FLUID AND MEANS OPERABLE FOR EFFECTING FLUID FLOW IN OPPOSITE DIRECTIONS BETWEEN SAID OPENINGS, (A) A CHECK VALVE AND LINT FILTER ASSEMBLY COMPRISING (B) MEANS FORMING A HOUSING HAVING A RECIRCULATION INLET CONNECTED TO SAID SECOND OPENING, A RECIRCULATION OUTLET CONNECTED TO SAID FIRST OPENING AND A DRAIN OUTLET ADAPTED TO BE CONNECTED TO A SEWER, (C) A CHECK VALVE MEANS IN SAID HOUSING COMPRISING A BLOCKING PORTION GUIDABLY MOUNTED IN A CHAMBER OF SAID HOUSING AND BODILY SLIDABLE IN RESPONSE TO THE DIRECTION OF FLUID FLOW BETWEEN A RECIRCULATION POSITION WHEREIN SAID RECIRCULATION INLET IS UNBLOCKED AND SAID DRAIN OUTLET IS BLOCKED AND A DRAIN POSITION WHEREIN SAID DRAIN OUTLET IS UNBLOCKED AND SAID RECIRCULATION INLET IS BLOCKED, (D) SAID CHECK VALVE MEANS HAVING BYPASS MEANS THROUGH WHICH SAID RECIRCULATION INLET IS PLACED IN COMMUNICATION WITH SAID RECIRCULATION OUTLET WHEN SAID BLOCKING PORTION OF THE CHECK VALVE MEANS IS IN SAID RECIRCULATION POSITION, (E) SAID RECIRCULATION OUTLET BEING PLACED IN COMMUNICATION WITH SAID DRAIN OUTLET WHEN SAID BLOCKING PORTION IS IN SAID DRAIN POSITION, (F) AND FILTER MEANS IN SAID CHAMBER AND IN FLUID FLOW INTERCEPTING RELATIONSHIP BETWEEN SAID RECIRCULATION INLET AND SAID RECIRCULATION OUTLET FOR FILTERING LINT OR THE LIKE FROM FLUID FLOWING FROM SAID TUB WHEN SAID FLUID IS FLOWING IN ONE DIRECTION AND SAID BLOCKING PORTION IS IN SAID RECIRCULATION POSITION, (G) SAID FILTER MEANS BEING IN FLUID FLOW INTERCEPTING RELATIONSHIP BETWEEN SAID RECIRCULATION OUTLET AND SAID DRAIN OUTLET FOR BACK-WASHING THE LINT OR THE LIKE FROM SAID FILTER MEANS WHEN SAID FLUID IS FLOWING FROM SAID TUB IN THE OPPOSITE DIRECTION AND SAID BLOCKING PORTION IS IN SAID DRAIN POSITION,