Fluid operated valve device

Claim 1

A VALVE DEVICE FOR USE IN A WELL COMPRISING: AN ELONGATED TUBULAR VALVE HOUSING, SAID HOUSING BEING OPEN AT ONE END AND HAVING PORT MEANS IN THE WALL THEREOF; PACKING MEANS POSITIONED ON THE EXTERIOR OF SAID HOUSING BELOW SAID PORT MEANS FOR FORMING A SEAL IN THE ANNULAR SPACE IN SAID WELL EXTERIOR OF SAID HOUSING; A VALVE SEAT ADJACENT THE OPEN END OF SAID HOUSING TO AN ELONGATED ELEMENT POSITIONED IN SAID HOUSING TO MOVE LONGITUDINALLY THEREIN, A PORTION OF SAID ELONGATED ELEMENT HAVING A CONTINUOUS OUTER CIRCUMFERENTIAL SURFACE SUCH THAT SAID PORTION FORMS A SEALING FIT WITH THE INTERIOR OF SAID HOUSING SO THAT WHEN SAID ELONGATED ELEMENT IS IN A FIRST POSITION THERE IS FREE COMMUNICATION FROM BELOW SAID PACKING MEANS THROUGH SAID PORT MEANS TO ABOVE SAID PACKING MEANS AND WHEN SAID ELONGATED ELEMENT IS IN A SECOND POSITION SAID COMMUNICATION IS RESTRICTED BY SAID CIRCUMFERENTIAL SURFACE; A VALVE MEANS CARRIED BY SAID ELONGATED ELEMENT BELOW SAID POSRTION OF CONTINUOUS CIRCUMFERENTIAL SURFACE FOR SEALING AGAINST SAID VALVE SEAT AND COMPLETELY CLOSING THE OPEN END OF SAID HOUSING WHEN SAID ELONGATED ELEMENT IS IN SAID SECOND POSITION.