Livestock oiler valve and method of installing same

Claim 1

A VALVE MECHANISM OF A TYPE ESPECIALLY SUITED FOR USE IN LIVESTOCK OILERS AND THE LIKE AS A MEANS FOR DISPENSING FLUIDS ONTO THE HIDES OF ANIMALS THAT PRESS THEREAGAINST WHICH COMPRISES, A GENERALLY CYLINDRICAL BARREL HAVING AN AXIAL BORE THERETHROUGH TERMINATING AT ITS INNER END IN A FLARED FRUSTO-CONICALS EAT, AN ANNULAR FLANGE FORMED INTEGRALLY WITH THE BARREL ON THE OUTSIDE THEREOF INTERMEDIATE ITS ENDSS, GASKET MEANS ENCIRCLING THE BARREL IN CONTINUOUS ANNULAR CONTACT THEREWITH AND WITH THE INNER FACE OF THE FLANGE ADAPTED TO ENGAGE THE PORTION OF A FLUID-RESERVOIR SURROUNDING THE OPENING THEREIN SIZED TO ACCEPT THE BARREL AND FORM OF FLUID-TIGHT JOINT THEREBETWEEN, A VALVE ELEMENT HAVING A CYLINDRICAL PLUNGER MOUNTED WITHIN THE BARREL FOR RECIPROCAL MOVEMENT IN CONTINUOUS ANNULAR SPACED RELATION TO THE BORE DEFINING A FLUID PASSAGE THEREBETWEEN, SAID VALVE ELEMENT INCLUDING A CUP-SHAPED CAP ON THE OUTER END THEREOF COVERING THE OUTER END OF THE BARREL AND DEFINING A CONTINUOUS ANNULAR CAIVTY THEREBETWEEN THROUGH WHICH FLUID MAY PASS FROM THE VALVE, COMPRESSIBLE ELASTIC SEALING MEANS MOUNTED ON THE INNER END OF THE PLUNGER POSITIONED AND ADAPTED TO ENGAGE THE FRUSTO-CONICAL SEAT AND FORM A CONTINUOUS ANNULAR CLOSURE FOR THE FLUID PASSAGE WHEN THE VALVE ELEMENT IS IN EXTENDED POSITION, AND SPRING MEANS OPERATIVELY INTERCONNECTING THE BARREL AND VALVE ELEMENT BIASING THE LATTER INTO EXTENDED POSITION THE SPRING MEANS COMPRISES A HELICAL COMPRESSION SPRING LOCATED IN THE ANNULAR CAVITIES BETWEEN THE CUP-SHAPED CAP AND THE OUTER END OF THE BARREL, THE INNER END OF SAID SPRING SEATING AGAINST THE OUTER FACE OF THE ANNULAR FLANGE WHILE THE OUTER END THEREOF ENGAGES THE TOP OF THE CAP ON THE INSIDE THEREOF.