Formation sampler

Claim 1

A DEVICE FOR OBTAINING SAMPLES OF THE FLUID CONTENT OF EARTH FORMATIONS TRAVERSED BY A BORE HOLE COMPRISING: A SUPPORT ADAPTED TO BE LOWERED WITHIN A BORE HOLE FROM THE SURFACE OF THE EARTH TO A LOCATION ADJACENT AN EARTH FORMATION FROM WHICH A FLUID SAMPLE IS DESIRED; MEANS ON SAID SUPPORT, INCLUDING A FLUID SAMPLE IS DESIRED; MEANS AREA OF FORMATION COMPRISING THE BORE HOLE WALL AND FOR ESTABLISHING COMMUNICATION BETWEEN SAID INLET AND FLUIDS CONTAINED WITHIN SAID FORMATION; FIRST, SECOND AND THIRD CHAMBERS IN SAID SUPPORT; VALVED PASSAGE MEANS INTERCONNECTING SAID FIRST, SECOND AND THIRD CHAMBERS; SAID FIRST CHAMBER CONTAINING A QUANTITY OF SUBSTANTIALLY INCOMPRESSIBLE FLUID; A NORMALLY CLOSED SAMPLE FLUID PASSAGEWAY INTERCONNECTING SAID FLUID INLET WITH SAID FIRST CHAMBER; MEANS FOR OPENING SAID SAMPLE FLUID PASSAGEWAY TO PROVIDE FLUID FLOW AND PRESSURE COMMUNICATION THERETHRU FROM SAID FLUID INLET INTO SAID FIRST CHAMBER, WHEREBY ANY