Filter device for aquarium tanks

Claim 1

IN A FILTER DEVICE FOR AN AQUARIMUM TANK, A CASING, A BASE MEMBER AT THE BOTTOM OF SAID CASING AND DEFINING A BASE CHAMBER, SAID BASE MEMBER HAVING A HORIZONTAL WALL AT THE TOP OF SAID BASE CHAMBER, A CONICAL FUNNELLIKE MEMBER WITH ITS MOUTH PORTION DISPOSED ABOVE THE BASE MEMBER AND ITS NECK PORTION EXTENDING ABOVE THE TOP OF SAID CASING, SAID NECK PORTION DEFINING A RESTRICTED PASSAGEWAY AND THE PORTION OF SAID FUNNEL-LIKE MEMBER THEREBELOW DEFINING A FLOW CHAMBER, SAID CASING HAVING A FILTER PORTION EXTERIORLY OF SAID FUNNEL-LIKE MEMBER ADAPTED TO HOUSE WATER-PURIFYING MEANS THEREIN, SAID HORIZONTAL WALL HAVING PRIMARY APERTURED MEANS DISPOSED EXTERIORLY OF SAID FUNNEL-LIKE MEMBER AND SECONDARY APERTURED MEANS DISPOSED WITHIN THE CONFINES OF THE MOUTH PORTION OF SAID FUNNEL-LIKE MEMBER, SAID PRIMARY APERTURED MEANS COMMUNICATING BETWEEN SAID FILTER PORTION AND SAID BASE CHAMBER, SAID SECONDARY APERTURED MEANS COMMUNICATING BETWEEN SAID BASE CHAMBER AND SAID FLOW CHAMBR, WATER ENTRANCE MEANS AT THE UPPER PORTION OF SAID CASING IN COMMUNICATION WITH SAID FILTER PORTION THEREOF, AND AN AIR INLET PIPE EXTENDING INTO AND COMMUNICATING WITH SAID FLOW CHAMBER, WHEREBY AIR OPERATIVELY ENTERING SAID FLOW CHAMBER WILL OPERATIVELY RISE TOWARD SAID RESTRICTED PASSAGEWAY, THEREBY CAUSING WATER TO BE OPERATIVELY DRAWN THROUGH SAID ENTRANCE MEANS AND DOWNWARDLY THROUGH SAID FILTER PORTION OF SAID CASING, INTO SAID BASE CHAMBER, UPWARDLY THROUGH SAID FLOW CHAMBER AND INTO CONTACT WITH SAID AIR WITHIN SAID RESTRICTED PASSAGEWAY, AND OUTWARDLY THEREFROM.