Turbulence inhibitors

A turbulence inhibiting device adapted to be assembled as one of a plurality of such devices in axial alignment with one another to provide a turbulence inhibiting lane, said device comprising:

• a. a central hub having a longitudinal axis
• b. an annular band postioned generally concentrically around said hub with ends of said hub extending axially beyond circumferential edge portions of said band,
• c. a plurality of generally planar vanes extending radially from said hub to said band, the plane of each of said vanes being substantially aligned with said longitudinal axis, said vanes projecting axially beyond said hub so as to be able to engage vanes of an adjacent device and limit relative rotation between such adjacent devices,
• d. said hub, band and vanes defining substantially open space within said band for substantially free flow of water therethrough,
• whereby with a plurality of such devices arranged in axial alignment, adjacent bands provide openings therebetween for flow of water through said openings, said vanes and said bands define axially aligned passageway means for flow of water axially within the aligned devices, and vanes of proximate devices overlap one another so that with proximate devices rotating relative to one another, engagement of proximate vanes limits such relative rotation to arcuate increments of travel between proximate vanes.