| 摘要 |
A two-way fluid flow metering pump for accurately measuring the rate of flow of a liquid is disclosed. A section of a cylindrical shaft is disposed in a bearing made of metal or a fairly rigid nondeformable plastic. An indentation or notch is made in a shaft section passing an inlet and outlet in the bearing, and liquid is transported by the indentation or notch from the inlet to the outlet, or vice versa, depending upon the direction of shaft rotation. A rubber or soft plastic seal inserted in an opening in the bearing remote from the inlet and outlet deforms and conforms to the shaft indentation at each rotation so that the liquid is not transported past the seal. |
