Pneumatic amplifier sampling valve for chromatographic analyzers

Claim 1

A FLUID-MOTOR ACTUATED VALVE SYSTEM FOR DISTRIBUTING A FIRST FLUID TO A SELECTED CONDUIT COMPRISING, IN COMBINATION: A FIRST BODY HAVING TWO OPPOSITE FACES; FIRST, SECOND, AND THIRD SPACED PASSAGES IN SAID BODY, EACH OF SAID SPACED PASSAGES COMMUNICATING BETWEEN SAID FACES; A SECOND BODY HAVING AN UPPER FACE SPACED FROM THE LOWER FACE OF SAID FIRST BODY; A FIRST FLEXIBLE SEALING DIAPHRAGM OF A DIAMETER AT LEAST SUFFICIENT TO COVER SAID SPACED PASSAGES; FIRST, SECOND, AND THIRD CYLINDRICAL RECESSES IN SAID UPPER FACE, OPPOSITE SAID FIRST, SECOND, AND THIRD SPACED PASSAGES, RESPECTIVELY; FIRST AND SECOND CYLINDRICAL PASSAGES TRAVERSING SAID SECOND BODY, WITHIN THE CIRCLE DESCRIBED BY SAID CYLINDRICAL RECESSES; FIRST AND SECOND PLUNGER RODS SLIDABLY DISPOSED IN SAID FIRST AND SECOND CYLINDRICAL PASSAGES, RESPECTIVELY; THE UPPER ENDS OF SAID FIRST AND SECOND RODS ADJACENTS SAID DIAPHRAGM AND INTERMEDIATE THE PORTS OF SAID FIRST, SECOND, AND THIRD SPACED PASSAGES, SO THAT SAID FIRST ROD SEALS AGAINST SAID DIAPHRAGM INTERMEDIATE SAID FIRST AND SECOND SPACED PASSAGES, AND SO THAT SAID SECOND ROD SEALS AGAINST SAID DIAPHRAGM INTERMEDIATE SAID SECOND AND THIRD SPACED PASSAGES; A FIRST POWER PISTON DISPOSED ADJACENT AND BELOW SAID SECOND BODY AND NORMALLY BIASED OUT OF CONTACT WITH SAID SECOND ROD; A FIRST CHAMBER DEFINED BY THE LOWER FACE OF SAID SECOND BODY AND THE UPPER FACE OF SAID FIRST POWER PISTON; FIRST BIASING MEANS DISPOSED IN SAID FIRST CHAMBER NORMALLY BIASING SAID FIRST PISTON DOWNWARD; A SECOND POWER PISTON DISPOSED ADJACENT AND BELOW SAID FIRST POWER PISTON AND NORMALLY BIASED IN CONTACT WITH SAID FIRST PLUNGER ROD; A THIRD BODY DISPOSED ADJACENT AND BELOW SAID SECOND PISTON AND NORMALLY SPACED THEREFROM; A SECOND CHAMBER DEFINED AT ITS UPPER END BY THE LOWER FACE OF SAID FIRST POWER PISTON AND AT ITS LOWER END BY THE UPPER FACE OF SAID SECOND POWER PISTON; A CYLINDRICAL CASING THE INNER SURFACE OF WHICH MAKES SEALING CONTACT WITH THE PERIPHERIES OF SAID POWER PISTONS, THE UPPER EDGE OF SAID CASING MAKES SEALING CONTACT WITH SAID SECOND BODY, AND THE LOWER EDGE OF SAID CASING MAKES SEALING CONTACT WITH SAID THIRD BODY; A SECOND AND STRONGER BIASING MEANS DISPOSED INTERMEDIATE SAID SECOND POWER PISTON AND SAID THIRD BODY NORMALLY BIASING THE FORMER UPWARD; MEANS TO SECURE SAID FIRST, SECOND, AND THIRD