Back to results
US 3,937,081 AGranted
Vortex flowmeter
AssigneeCox Instrument Division, Lynch Corporation
InventorsKarnig H. Dabanian, Lawrence F. Rapp, Dale C. Good
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeCox Instrument Division, Lynch Corporation
InventorsKarnig H. Dabanian, Lawrence F. Rapp, Dale C. Good
Estimating the term…
A vortex type flowmeter having a body member, a cover member and an interior varying diameter cavity formed in the body member in which fluid is introduced to flow in a generally helical pattern within the cavity, the fluid being introduced at the periphery of the cavity having the largest diameter and the fluid exiting from an aperture at the center of the vortex formed by the helical flow. The flowmeter includes a toothed rotor mounted for rotation within the cavity and the flow of fluid causes the rotor to rotate within the cavity at a rotational rate which is generally directly related to the velocity of flow. The flowmeter is provided with a light-emitting diode and photosensitive transistor combination which senses the passage of each of the teeth as the rotor is rotating within the cavity. The assembly further includes a spoiler assembly which takes the same general configuration as the rotor, the spoiler assembly being mounted closely adjacent and parallel to the rotor to cause shear drag on the rotor at high flow rates to improve the down side response time of the rotor after the flow of fluid has been decreased. In this way the linearity of the assembly is enhanced.
A vortex flowmeter comprising a body structure having a cavity formed therein, said cavity having a varying diameter from a large diameter section to a small diameter section, an inlet port positioned generally tangential to said large diameter portion and an outlet port positioned adjacent said small diameter portion for permitting the flow of fluid through said cavity in a generally swirling manner, a rotor positioned in said cavity having a plurality of teeth formed thereon, spoiler means positioned adjacent said rotor and in fluid coupling therewith, said coupling creating a shear drag on said rotor to improve the down side response time of said rotor, and a pickup system positioned to sense the passage of said teeth in response to the flow of fluid in said cavity.
A flowmeter comprising a body structure having a cavity formed therein, an inlet port positioned generally tangential to said cavity and an outlet port positioned remote from said inlet port for permitting the flow of fluid through said cavity in a generally swirling manner, a rotor positioned in said cavity having a plurality of teeth formed thereon, a pickup system positioned to sense the passage of said teeth in response to the flow of fluid in said cavity, and spoiler means positioned adjacent to and in fluid coupling with said rotor to reduce the slowdown time of said rotor when the flow of fluid to said cavity is reduced.
Dependencies are inferred from the claim text.