Compact poultry watering device

Claim 1

IN A POULTRY WATERING VALVE, THE COMBINATION OF; A VALVE BODY DEFINING A CHAMBER HAVING AN INLET OPENING AND A DISCHARGE OPENING; A FIRST MOVEABLE VALVE ELEMENT ARRANGED FOR MOVEMENT BETWEEN A FIRST POSITION IN WHICH IT OPENS SAID INLET OPENING AND A SECOND POSITION IN WHICH IT CLOSES SAID INLET OPENING; A SECOND MOVEABLE VALVE ELEMENT OPERATIVELY DISPOSED WITH RESPECT TO SAID DISCHARGE OPENING; ACTUATING MEANS RESPONSIVE TO THE FLUID PRESSURE IN SAID CHAMBER TO ACTUATE SAID FIRST MOVEABLE VALVE ELEMENT TO SAID SECOND POSITION WHENEVER THE PRESSURE IN SAID CHAMBER EQUALS A PREDETERMINED VALUE AND MAINTAIN THE SAME IN SAID FIRST POSITION WHENEVER SAID PRESSURE IS LESS THAN SAID PREDETERMINED VALUE; SAID ACTUATING MEANS COMPRISING A DIAPHRAGM RESPONSIVE TO THE PRESSURE IN SAID CHAMBER, AN OPERATING ROD EXTENDING THROUGH SAID DIAPHRAGM ADJACENT THE CENTER OF SAID DIAPHRAGM, AND AN ELONGATED ANNULAR PROJECTION ON SAID DIAPHRAGM HAVING AN INTERIOR SURFACE IN ELASTIC GRIPPING ENGAGEMENT WITH SAID OPERATING ROD AND AN EXTERIOR SURFACE; SAID EXTERIOR SURFACE OF SAID PROJECTION BEING EXPOSED TO THE PRESSURE IN SAID CHAMBER TO ENABLE SAID PRESSURE TO COMPRESS THE INTERIOR SURFACE OF SAID PROJECTION INTO TIGHT SEALING ENGAGEMENT WITH SAID ROD, WHEREBY LEAKAGE FROM SAID CHAMBER BETWEEN SAID DIAPHRAGM AND SAID ROD IS PREVENTED AT THE VARIOUS PRESSURES IN SAID CHAMBER.