Control valve structure and linkage therefor

Claim 1

A VALVE HAVING A BODY PROVIDED WITH A VALVING CAVITY, A PLURALITY OF ALTERNATELY STACKED ANNULAR PACKING MEMBERS AND PERFORATED SPACERS CO-AXIALLY ENGAGED AND MOUNTED IN SAID CAVITY TO DEFINE A PASSAGEWAY, A PLURALITY OF PORTS IN SAID BODY OPENING TO SAID CAVITY, A PLUNGER DISPOSED IN SAID PASSAGEWAY DEFINED BY SAID ANNULAR PACKING MEMBERS AND SPACERS AND PROVIDED WITH A PLURALITY OF VALVING SURFACES, SUCH THAT UPON RECIPROCATION OF SAID PLUNGER, SAID VALVING SURFACES ARE ADAPTED TO ENGAGE SAID PACKING MEMBERS UPON MOVEMENT OF THE PLUNGER SELECTIVELY TO ESTABLISH DIFFERENT PATHS OF COMMUNICATION BETWEEN THE PORTS, A PUSH ROD, AND EXTENSION ON THE PLUNGER ENGAGED BY THE PUSH ROD SUCH THAT THE PLUNGER MAY BE MOVED AXIALLY, SPRING MEANS FOR BIASING THE PLUNGER IN OPPOSITION TO SAID PUSH ROD TO AN AXIAL POSITION WITH THE PLUNGER DISPOSED TOWARD THE OUTER END OF SAID CAVITY, AN ANNULAR RECESS PORTION SURROUNDING THE SAID VALVING CAVITY TO DEFINE A SHOULDER AT THE ENTRANCE THEREOF IN SAID BODY, A CUP-SHAPED PUSH ROD HOUSING HAVING AN OPEN END AND AN APERTURE IN THE OPPOSITE END THEREOF, AN ANNULAR SURFACE FORMED ON THE OPEN END OF SAID HOUSING, SAID HOUSING BEING PARTIALLY RECEIVED IN SAID ANNULAR RECESS WITH THE ANNULAR SURFACE ON THE HOUSING SEATED ON THE ANNULAR SHOULDER FORMED BY SAID RECESS AND A PORTION OF THE SAID PUSH ROD DISPOSED IN AND PROTRUDING FROM THE APERTURE IN SAID HOUSING, MEANS ASSOCIATED WITH SAID PUSH ROD HOUSING AND SAID BODY REMOVABLY TO LOCK SAID HOUSING IN THE ANNULAR RECESS TO RETAIN THE VALVE ELEMENTS IN ASSEMBLED RELATIONSHIP IN SAID VALVE CAVITY AND THEREBY TO PROVIDE ACCESS TO SAID VALVE ELEMENT UPON DISENGAGEMENT OF SAID LAST NAMED MEANS AND THE REMOVAL OF SAID HOUSING.