Patent ID: 7900522

Claim:
A flow meter for use in a fluid conduit, comprising: (a) a housing having; (b) a first flow passage and a second flow passage in fluid communicating engagement with the housing; (c) a flow sensor disposed in each of the first and second flow passages; (d) a rotor rotatable about an axis of rotation, the rotor being at enclosed at least in part by the housing and having at least two channels, each channel being sealingly positionable in an operative position between the flow passages for fluid communication with the flow passages by rotation of the rotor, and having a different diameter than another channel; (e) a positioner associated with each channel for precisely positioning a channel into the operative position, wherein the positioner comprises a positioning bore on the rotor and the flow meter further comprises a biasing position retainer mounted in the housing and displaceably engaging the positioning bore of a channel when that channel is in the operative position; and, (f) a rotor rotator.