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US 4,397,192 AGranted
Vortex flowmeters
AssigneeFlonic
InventorJean-Paul Mollet
Life of this patent
Estimating the term…
Abstract
A vortex fluid flowmeter adapted to measure the flowrate of fluid passing through a conduit by measuring the frequency of emission of alternating vortices generated by an obstacle extending across the conduit, comprises a mesh structure mounted upstream of the vortex-shedding obstacle. Said mesh structure is constituted by a grid made of bars of wires of rectangular cross-section. The distance between the grid and the obstacle is so chosen that the obstacle be in the efficient working range of the grid.
Claims4
A vortex fluid flowmeter comprising:
- circular conduit means having an internal diameter D;
- an obstacle disposed within said conduit means transversely thereof for generating vortices in fluid flowing through said conduit means;
- sensor means responsive to the emission of said fluid;
- a mesh structure disposed within said conduit means perpendicular to the direction of the fluid on the upstream side of said obstacle wherein said mesh structure is a grid made of bars rectangular in cross-section placed at a distance from said obstacle comprised between about D and 5 D said grid having a ratio of thickness parallel to the fluid flow to the mesh size in the range between about 0.16 and about 0.28.
1 more element
Dependencies are inferred from the claim text.