Apparatus for filtering liquid

Claim 1

APPARATUS FOR FILTERING A LIQUID, SAID APPARATUS COMPRISING A CONTAINER FOR MAINTAINING A QUANTITY OF SUCH LIQUID AT A DESIRED LEVEL, MEANS FOR SUPPORTING A SUPPLY OF FILTER MEDIUM OF INDEFINITE LENGTH, MEANS FOR ADVANCING THE FILTER MEDIUM FROM THE SUPPLY SUPPORT THROUGH A ZONE OF USE, MEANS FOR COLLECTING THE FILTER MEDIUM FOLLOWING THE USE THEREOF, STRUCTURE FOR POSITIONING A PORTION OF THE FILTER MEDIUM IN SUBMERGED RELATIONSHIP TO SUCH LIQUID LEVEL, SAID STRUCTURE COMPRISING BASE AND TOP PORTIONS HAVING ALIGNED OPENINGS THERETHROUGH WITH THE POSITION OF THE FILTER MEDIUM BEING DISPOSED INTERMEDIATE THE BASE AND THE TOP PORTIONS AND COVERING THE OPENINGS THERETHROUGH, A CONTROL FOR ENABLING THE FILTER MEDIUM TO BE ADVANCED ALONG A GIVEN COURSE FROM THE SUPPLY THEREOF TO THE POSITION AT THE STRUCTURE AND THEN TO THE COLLECTING MEANS, SAID CONTROL COMPRISING BRACKET-LIKE ELEMENTS HAVING ELONGATE OPENINGS THEREIN FOR PIVOTALLY MOUNTING THE TOP PORTION OF THE STRUCTURE TO THE BASE PORTION THEREOF, AN ELONGATE MEMBER SECURED TO THE TOP PORTION OF THE STRUCTURE AT A LOCATION THEREON WHICH IS INTERMEDIATE THE LONGITUDINALLY EXTENDING CENTERLINE THEREOF AND THE BRACKET-LIKE ELEMENTS, A LINKAGE COMPRISING A LEVER-LIKE PART HAVING THE MEMBER SECURED THERETO ADJACENT ONE END PORTION THEREOF AND AN ACTUATOR SECURED ADJACENT THE OTHER END PORTION, SAID LEVER-LIKE PORT BEING PIVOTALLY MOUNTED INTERMEDIATE THE END PORTIONS THEREOF TO EFFECT MOVEMENT TO THE MEMBER IN A DIRECTION THAT IS OPPOSED TO THE DIRECTION OF MOVEMENT OF THE ACTUATOR, AND MEANS FOR URGING SUCH LIQUID TO FLOW IN A PATH THROUGH THE PORTION OF THE FILTER MEDIUM WHICH IS POSITIONED BY THE STRUCTURE.