Airflow control unit for aquariums

Claim 1

AN AIR FLOW CONTROL UNIT FOR AQUARIUMS COMPRISING A PAIR OF FLAT BODY SECTIONS OF SUBSTANTIALLY LIKE DIMENSIONS ADAPTED TO BE SECURED TOGETHER AT ONE OF THE FACES THEREOF SUBSTANTIALLY UNITARILY, SAID FACE OF EACH SECTION HAVING FORMED THEREIN MEDIALLY LONGITUDINALLY A CHANNEL SEMICIRCULAR IN CROSS-SECTION, SAID SEMICIRCULAR CHANNEL, ON SO SECURING SAID SECTIONS TOGETHER, DEFINING A LONGITUDINAL AIR RECEIVING PASSAGE IN SAID UNIT FOR COUPLING AT ONE LONGITUDINAL END THEREOF OF THE UNIT WITH A SOURCE OF AIR UNDER PRESSURE, MEANS ENGAGING THE BODY SECTIONS FOR CLOSING THE OTHER END OF SAID CHANNEL, COMPLEMENTARY RECESSES FORMED IN SAID FACES OF THE BODY SECTIONS IN SPACED PARALLEL RELATION TRANSVERSELY TO THE LONGITUDINAL AXIS THEREOF AND OPENING INTO THE LONGITUDINAL CHANNEL, SAID COMPLEMENTARY RECESSES, ON SO SECURING SAID SECTIONS, TOGETHER DEFINING TRANSVERSE AIR CONDUITS FOR FLOW OF AIR FROM THE LONGITUDINAL AIR CHANNEL, TUBULAR INSERT MEANS ENGAGING ONE END OF THE TRANSVERSE CONDUITS FOR CONNECTION OF AQUARIUM AIR TUBES THEREWITH, SAID MEANS HAVING A VALVE SEAT AT ITS INNER END, COMPLEMENTARY THREADED PORTIONS FORMED IN THE OPPOSITE ENDS OF SAID TRANSVERSE AIR CONDUITS AND NEEDLE VALVE STEMS THREADEDLY AND ROTATABLY JOURNALLED IN SAID THREADED PORTIONS AND DISPOSED IN SAID TRANSVERSE AIR CONDUITS, AND ADAPTED TO COOPERATE WITH SAID SEATS FOR CONTROLLING THE FLOW OF AIR THROUGH SAID AQUARIUM AIR TUBES.