Poultry watering trough with a freely suspended drinking vessel and an automatic filling valve

Claim 1

IN A POULTRY WATERING DEVICE OF THE TYPE HAVING A FREELY SUSPENDED DRINKING VESSEL, A VERTICALLY DISPOSED TUBULAR MEMBER, THE UPPER END OF WHICH IS ADAPTED TO BE SECURED TO A WATER SUPPLY, A VALVE HOUSING SECURED IN THE LOWER END OF SAID TUBULAR MEMBER, SAID HOUSING HAVING A PASSAGE CHANNEL EXTENDING AXIALLY OF SAID TUBULAR MEMBER AND A CIRCULAR FLANGE EXTENDING OUTWARDLY OF THE LOWER END OF SAID TUBULAR MEMBER, A BUSH SLIDABLY MOUNTED ON SAID TUBULAR MEMBER, A BELL-SHAPED DRINKING VESSEL FORMED WITH AN UPWARDLY EXTENDING SLEEVE AND HAVING AN OPEN PORTION IN THREADED ENGAGEMENT WITH SAID BUSH, THE LOWER PORTION OF SAID SLEEVE BEING LATERALLY SPACED FROM SAID TUBULAR MEMBER, A SPRING IN SAID SPACE FOR BIASING SAID BUSH AWAY FROM SAID FLANGE, SAID SLEEVE HAVING A CLOSED BOTTOM AND A SIDE OUTLET ADAPTED TO COMMUNICATE WITH SAID CHANNEL, A CAGE MOUNTED ON THE TOP OF SAID VALVE HOUSING A VALVE ELEMENT HAVING A STEM DISPLACEABLE VERTICALLY IN SAID PASSAGE CHANNEL AND IN CONTRACT WITH SAID CLOSED SLEEVE BOTTOM AND A DISC HEAD, FOR CLOSING SAID CHANNEL, THE DIAMETER OF SAID STEM BEING SMALLER THAN THAT OF SAID PASSAGE CHANNEL AND A SPRING IN SAID CAGE FOR BIASING SAID DISC HEAD AGAINST SAID PASSAGE CHANNEL, SAID DRINKING VESSEL HAVING A BOTTOM EDGE PORTION FORMED AS TROUGH MEANS.