Patent ID: 6032528
Filing Date: 2000-03-07
Classification: G01F

Abstract:
A flow meter having an inlet and an outlet for connection into a fluid line, comprising:a first, a second and a third cylinder in the meter,a free piston axially movable within each cylinder, the piston being movable by fluid flow from the inlet,each cylinder having a plurality of ports, the ports being controlled by the free piston,the meter being adapted so that at any time fluid can flow therethrough from the inlet to the outlet by a fluid pathway which includes two of the cylinders,two fluid passageways for each cylinder, the two fluid passageways each having one end and another end, wherein the one ends are respectively connected to two of the ports of each cylinder and the another ends are respectively connected to two end parts of another of the cylinders, another port of each cylinder being located between said two of the portsthe inlet being flow connected to said another port of the first and second cylinders,the outlet being flow connected to said another port of the third cylinder.