초록 ▼

An in-line flow meter for use in drip irrigation systems which provides a field adjustable, infinitely variable visual flow indication of both high and low flow rates above and below a field adjustable normal flow rate is provided by means of a drag paddle rotatably disposed in the flow in the fluid

An in-line flow meter for use in drip irrigation systems which provides a field adjustable, infinitely variable visual flow indication of both high and low flow rates above and below a field adjustable normal flow rate is provided by means of a drag paddle rotatably disposed in the flow in the fluid conduit. The paddle carries a magnet and an indicator lever exterior to the conduit carries a second magnet which interacts with the magnet on the paddle. The paddle which hangs downwardly into the flow, and rotates upwardly and downwardly depending on whether the flow increases or decreases. The exterior indicator lever similarly rotates to mimic or telegraph the angular orientation of the paddle through the interaction of the two magnets. An adjustable counterweight is provided on or as the exterior indicator lever and can be positioned so that the indicator lever is approximately level or aligned with a fixed shield when the predetermined flow is achieved.

대표청구항 ▼

[ I claim:] [1.] A flow meter comprising:a body for providing a conduit of fluid flow;a rotatable paddle disposed in said fluid flow within said body;a permanent magnet disposed on said paddle;a rotatable indicator disposed outside of said body, vertically disposed on said body above said paddle and

[ I claim:] [1.] A flow meter comprising:a body for providing a conduit of fluid flow;a rotatable paddle disposed in said fluid flow within said body;a permanent magnet disposed on said paddle;a rotatable indicator disposed outside of said body, vertically disposed on said body above said paddle and disposed so as to be visually accessible; anda second permanent magnet disposed on said indicator, said second permanent magnet positioned and oriented on said indicator to magnetically oppose said permanent magnet disposed upon said paddle so that the level of fluid flow through said body relative to a field-adjusted null position is indicated by the position of said indicator exterior to said body.