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Visual flow indicator

  • US 4,543,095 A
  • Filed: 10/14/1983
  • Issued: 09/24/1985
  • Est. Priority Date: 10/14/1983
  • Status: Expired due to Term
First Claim
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1. Pulsating apparatus for visually indicating the direction and flow of a fluid comprising a hollow chamber having an axis and comprising first and second spaced, substantially circular walls and a substantially cylindrical wall, colinearly aligned inlet and outlet ports, located at tangentially spaced points along said cylindrical wall of said chamber on opposite sides thereof, an element freely rotatably mounted within said chamber, said element comprising an axle and a plurality of blade-like projections radially extending from said axle towards said cylindrical wall, at least one of said projections being shorter than the others and having a peripheral edge spaced from said cylindrical wall, said axle comprising end portions extending laterally beyond the plane of said projections at either side thereof, each of the circular walls comprising a recess in the interior surface thereof, said recesses being aligned with each other and with the axis of said chamber, said recesses being adapted to accept said laterally extending end portions of said axle so as to permit said element to freely rotate about said axis, wherein said chamber comprises a substantially transparent portion to permit observation of the rotational movement of said element as fluid flows from said inlet port to said outlet port and wherein said rotational movement of said element has a pulsating effect due to the presence of said one shorter projection.

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