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Flow sensor probes

  • US 4,399,696 A
  • Filed: 12/11/1980
  • Issued: 08/23/1983
  • Est. Priority Date: 04/19/1979
  • Status: Expired due to Term
First Claim
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1. A flow sensor, including a conduit, at least one pair of independently rotatable multiple-blade rotors mounted in the conduit for independent rotation about parallel axes displaced equally from the axis of the conduit, the blades of any pair of rotors being arranged to cause mutually opposite directions of flow-activated rotation of the rotors about the axes thereof, and rotation sensors adjacent said rotors, respectively.

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