Dispensing pump valve structure

Claim 1

IN A DISPENSING PUMP COMPRISING A HOUSING OF INTEGRAL CONSTRUCTION FORMED WITH AN INTERNAL BORE HAVING A MOUTH OPENING THROUGH ONE END OF SAID HOUSING, SAID BORE BEING CONSTRICTED MEDIALLY OF ITS LENGTH AND BEING DEFINED BY A CONICALLY TAPERED PILOT SURFACE CONVERGING INWARDLY FROM SAID MOUTH TO THE CONSTRICTION, SAID HOUSING BEING FORMED WITH AN INLET PORT OPENING AXIALLY THEREINTO ON THE REMOTE SIDE OF SAID CONSTRICTION FROM SAID MOUTH, TOGETHER WITH A VALVE SEAT AROUND SAID PORT, AND A DISCHARGE PORT OPENING RADIALLY THROUGH SAID INNER WALL SURFACE AT A LOCATION BETWEEN SAID VALVE SEAT AND THE CONSTRICTION, A RESILIENTLY DEFORMABLE VALVE BODY OF GREATER DIAMETER THAN SAID CONSTRICTION DISPOSED IN SAID BORE BETWEEN SAID VALVE SEAT AND SAID CONSTRICTION FOR ALTERNATING AXIAL MOVEMENT INTO SEATING RELATION WITH THE RESPECTIVE PORTS, MEANS BEING PROVIDED TO DEFINE A BYPASS PASSAGE PERMITTING FLUID FLOW FROM SAID INTAKE PORT PAST THE VALVE BODY AND THROUGH SAID CONSTRICTION WHEN THE VALVE BODY IS SEATED RELATIVE TO SAID DISCHARGE PORT, SAID MOUTH OF THE BORE BEING OF GREATER DIAMETER THAN SAID VALVE BODY, WHEREBY SAID PILOT SURFACE MAY SLIDABLY ENGAGE AND COMPRESS SAID VALVE BODY FOR PASSAGE THROUGH SAID CONSTRICTION DURING ASSEMBLY OF SAID VALVE BODY AND SAID HOUSING.