Bi-directional flow control conduit

Claim 1

A HYDRAULIC CIRCUIT FOR A WASHING MACHINE OPERABLE THROUGH AN AGITATION PERIOD AND A DRAIN PERIOD COMPRISING, A TUB ADAPTED TO CONTAIN FLUID DURING AN AGITATION PERIOD, FIRST AND SECOND OUTLETS IN SAID TUB, CONDUIT MEANS INTERCONNECTING SAID FIRST AND SECOND OUTLETS, A DRAIN CONDUIT CONNECTED TO SAID CONDUIT MEANS, FILTER MEANS IN SAID CONDUIT MEANS FOR FILTERING FLUID PASSING THERETHROUGH, REVERSIBLE FLOW PUMP MEANS IN SAID CONDUIT MEANS FOR PUMPING FLUID AT A FIRST VOLUME FLOW RATE FROM SAID FIRST OUTLET THROUGH SAID FILTER MEANS AND THROUGH SAID DRAIN CONDUIT DURING SAID DRAIN PERIOD, A RESILIENT HOSE INCLUDED IN SAID CONDUIT MEANS BETWEEN SAID PUMP MEANS AND SAID FILTER MEANS, SAID HOSE MANUFACTURED TO HAVE SUCH RESILIENT PROPERTIES THAT IT WILL PARTIALLY COLLAPSE UNDER NEGATIVE INTERNAL PRESSURE AND THEREBY IMPEDE FLUID FLOW THROUGH SAID FILTER MEANS BY AT LEAST 1/3 WHEN UNDER NEGATIVE INTERNAL PRESSURE AND REVERT TO A NORMAL EXPANDED CONDITION WHEN UNDER POSITIVE INTERNAL PRESSURE, AND CONTROL MEANS FOR REVERSING THE FLOW THROUGH SAID PUMP MEANS TO EFFECT FLOW THROUGH SAID SECOND OUTLET, THROUGH SAID FILTER MEANS, AND THROUGH SAID PARTIALLY COLLAPSED HOSE TO SAID TUB AT SAID REDUCED VOLUME FLOW RATE DURING SAID AGITATION PERIOD.