Patent ID: 7091628

Claim:
A system for extracting energy from fluid flowing in a conduit, comprising: (a) a conduit for carrying a flowing fluid therethrough, said conduit having a predetermined external diameter, (b) a turbine comprising a plurality of magnetically permeable radial blades rotatably mounted in said conduit upon an axis or pivot that is parallel to said conduit, such that fluid flowing in said conduit will cause said blades to rotate, (c) a ring concentric to and positioned around said conduit, said ring having an inside and an outside and an internal diameter larger than said external diameter of said conduit, said ring being rotatably mounted so as to be able to rotate with respect to said conduit, (d) a corresponding plurality of magnetically permeable members mounted on said inside of said ring, said plurality of magnetically permeable members being spaced around said ring so that they can be radially aligned with said respective plurality of blades, by adjusting the rotational position of said conduit, (e) one of said plurality of said magnetically permeable members or said plurality of magnetically permeable radial blades being magnetized, and (f) a coupling for mechanically coupling rotation of said ring to a mechanical utilization device.