Fluid sampling device

Claim 1

A FLUID SAMPLING DEVICE ADAPTED TO WITHDRAW MEASURED SAMPLES OF FLUID UNDER PRESSURE FROM A FLOW LINE AND DELIVER THE SAME EXTERIORLY OF THE FLOW LINE AND COMPRISING A SLEEVE MEMBER PROJECTING INTO SAID FLOW LINE, SAID SLEEVE MEMBER BEING PROVIDED WITH A PAIR OF DIAMETRICALLY OPPOSED RADIAL PORTS, A HOLLOW DELIVERY TUBE THROUGH WHICH SAMPLES OF FLUID ARE ADAPTED TO BE EXPELLED FROM THE FLOW LINE, SAID DELIVERY TUBE BEING FIXEDLY CONNECTED TO SAID SLEEVE MEMBER, A CYLINDRICAL CUP MEMBER FITTING WITHIN SAID SLEEVE MEMBER IN COAXIAL RELATIONSHIP, MEANS FOR ROTATING ONE OF SAID MEMBERS, MEANS FIXEDLY SECURING THE OTHER MEMBER AGAINST ROTATION, SAID CUP MEMBER BEING PROVIDED WITH A PAIR OF DIAMETRICALLY OPPOSED RADIAL PORTS WHICH ARE MOVABLE INTO REGISTER WITH THE RADIAL PORTS IN THE SLEEVE MEMBER DURING EACH 180* RELATIVE ROTATION BETWEEN THE TWO MEMBERS, SAID SLEEVE MEMBER BEING PROVIDED WITH A LONGITUDINALLY EXTENDING PORT FOR ESTABLISHING COMMUNICATION BETWEEN THE DELIVERY TUBE AND THE INTERIOR OF THE SLEEVE MEMBER, SAID CUP MEMBER BEING PROVIDED WITH AN END WALL HAVING A COOPERATING LONGITUDINALLY EXTENDING PORT DESIGNED FOR REGISTER WITH THE LONGITUDINALLY EXTENDING PORT IN THE SLEEVE MEMBER AND, WHEN IN SUCH REGISTER, ESTABLISHING COMMUNICATION BETWEEN THE INTERIOR OF THE CUP MEMBER AND THE DELIVERY TUBE, SAID LONGITUDIANALLY EXTENDING PORTS BEIG DESIGNED FOR REGISTER WITH EACH OTHER DURING EACH 360* RELATIVE ROTATION BETWEEN THE MEMBERS AND AT A TIME WHEN THE RADIAL PORTS IN THE SLEEVE MEMBER AND CUP MEMBER ARE OUT OF REGISTER, A CYLINDRICAL PISTON RECIPROCABLE IN SAID CUP MEMBER AND MOVABLE TOWARD AND AWAY FROM SAID END WALL FOR EXPELLING FLUID SAMPLES THROUGH SAID LONGITUDINALLY EXTENDING PORTS TO THE DELIVERY TUBE, THE END OF THE PISTON REMOTE FROM SAID END WALL BEING EXPOSED TO FLUID PRESSURE IN SAID FLOW LINE, INTERENGAGING CAM MEANS ON THE SLEEVE MEMBER AND PISTON FOR EFFECTING RETRACTION OF THE PISTON DURING ROTATION OF SAID ONE MEMBER, AND AT SUCH TIME AS SAID LONGITUDINALLY EXTENDING PORTS ARE IN REGISTER, AND A PLUG VALVE ON THE OTHER END OF SAID PISTON, SAID PLUG VALVE BEING ADAPTED FOR SEALING ENGAGEMENT WITH SAID LONGITUDINALLY EXTENDING PORT IN THE END WALL OF SAID CUP MEMBER WHEN THE PISTON IS IN ITS FULLY RETRACTED POSITION.