Patent ID: 7082848

Claim:
A method for transferring a representative fluid sample from a pressurized fluid source into a sample bottle, the sample bottle having an opening closed by membrane made from a rubber-elastic material, said method comprising: placing the closed sample bottle into a pressure vessel having a cap with a central opening that communicates with the pressurized fluid source via a tube; connecting an upper end of a tubular inner wall of an injection needle, the tubular inner wall having a needle point, to the pressurized fluid source; and inserting the needle into the sample bottle through the membrane to a level at which the membrane sealingly engages a tubular outer wall of the needle, which tubular outer wall concentrically surrounds and is radially spaced from the inner wall at least along a portion of the inner wall distant from the needle point, the membrane sealingly engaging the outer wall between longitudinally spaced apertures in the outer wall such that initially some of the fluid injected from the pressurized fluid source is allowed to flow into an annulus between the inner wall and the outer wall of the needle through one of the spaced apertures of the outer wall inside of the sample bottle on one side of the membrane, then out through another of the spaced apertures of the outer wall outside of the sample bottle on the other side of the membrane, and then back to the fluid source through the tube.