Patent ID: 6467480
Filing Date: 2002-10-22
Classification: G01F

Abstract:
A device for movement and measurement of a fluid volume, with the fluid volume being defined in a measuring chamber of a rotation vessel by at least first and second pistons movable within the measuring chamber, said pistons separating the fluid volume and indicating fluid-volume movement into and out of the measuring chamber via flow-regulating valves, the device comprising:the rotation vessel; the flow-regulating valves; the at least first and second pistons, which are alternately rotated and held fixed; holding means for alternately fixedly holding the first and second pistons within the measuring chamber; wherein, during a first cycle phase, a volume of fluid flows into a first measuring space within the measuring chamber, said first measuring space being defined by at least the first piston, which is held fixed within the measuring chamber by the holding means, and by at least the second piston, which is movable within the measuring chamber; and wherein, during a second cycle phase, the volume of fluid in the first measuring space flows out of the first measuring space as the second piston is held fixed within the measuring chamber by the holding means and the first piston is movable within the measuring chamber; wherein the first measuring space is separated from a second measuring space of the measuring chamber by at least one of said first and second pistons.