| 摘要 |
A fluid flow meter of the positive displacement rotary kind where a housing defines an annular passage coupling input and output ports, a rotor has depending blades which are driven around the passage by the flow of fluid and an idler has pockets which accommodate the rotor blades in sealed relationship as the blades pass from outlet to inlet, the invention being characterized in the provision of two rotors each having blades and pockets and two annular passages accommodating respectively the blades of the different rotors, and each rotor constitutes the idler for the other rotor. |
