Fluid flow meter

Abstract

A fluid flow meter with a turbine rotationally supported within a transparent cylindrical housing and biased against its rotational response to the flow of fluid whereby flow rates are read on a circumferential scale mounted on the turbine. In an alternative embodiment, in addition to rotational movement the turbine is biased against axial movement whereby a helical scale mounted on the turbine may be calibrated and read along more than a single 360.degree. of angular movement. In another alternative embodiment, a compression spring in combination with a threaded axle which mates with a threaded cavity within the turbine, provides helical displacement of the turbine for permitting the calibration of more than 360.degree. of angular rotation.

Dependencies are inferred from the claim text.