Dlhbowles, Inc.

Christopher F South

Shridhar Gopalan

Gregory Adam Russell

Dharapuram N Srinath

Russell Hester

Eric Koehler

Srinivasaiah Sridhara

Benjamin D Hasday

Kerrie Allen

A clog resistant in-line vortex emitter and drip irrigation assembly and method uses a double-sided circuit and a series of vortex chambers of optimized dimensions to create a pressure drop with large dimensions and good clog resistance. The vortex chamber 100 also al lows for a lower exponent than traditional circuits. This gives a pressure regulating property to the no-moving-parts circuit. The vortex emitter allows for some pressure regulation without sacrificing recyclability or requiring moving parts. The vortex circuit of the present disclosure is optimized for an emitter efficiency Ef value wherein Ef=(k/Ackt)*Amin such that k is a unitless head loss coefficient, Ackt is the area of the circuit, and Amin is the minimum cross sectional area of the circuit. A higher k per a given area with larger dimensions allows for a smaller part with a lower chance of clogging.

Clog resistant in-line vortex element irrigation emitter

An oscillating or pulsing fluid stream, or flow, is produced from a flow of pressurized air by fluidic apparatusin a deviceconfigured for use in surface cleaning, sweeping, lawn care applications, and the like. Converging inlet chamber walls, define a tapered internal lumen having a smooth narrowing profile is configured to generate at a power nozzlea high velocity stream with minimal pressure drop. Downstream of the power nozzle, first and second control ports CP, CPare in fluid communication with the high velocity streamand with each other via an inertance loophaving a lumen of selected cross sectional area and length. The varying air flow is directed through an outlet chambershaped to produce an oscillating flowor a pulsating flow

Method and fluidic apparatus for generating pulsed and oscillating air flow for surface cleaning and sweeping

A long throw Pop-Up Irrigation Nozzle assembly has no oscillating or rotating parts and includes a cylindrical body having a fluid inlet and a sidewall defining at least one fluidic circuit configured to generate a selected spray pattern when irrigation fluid flows through the body. In order to throw long distance, droplet velocity, droplet size and droplet initial aim angle determine the throw to provide a low precipitation rate ('PR') for fluidic sprays. The nozzle assembly and method of the present invention achieve a PR of 1 in/hr or less and good spray distribution with a scheduling coefficient ('SC') of about 1.5 without utilizing any moving components to provide a significantly more cost effective nozzle assembly, as compared to prior art rotator nozzles.

Irrigation nozzle assembly and method

An oscillating or pulsing fluid stream, or flow, is produced from a flow of pressurized air by fluidic apparatus in a device configured for use in surface cleaning, sweeping, lawn care applications, and the like. A converging nozzle assembly defining a tapered internal lumen having a smooth narrowing profile is configured to generate at a power nozzle a high velocity stream with minimal pressure drop. Downstream of the power nozzle, first and second control ports are in fluid communication with the high velocity stream and with each other via an inertance loop having a lumen of selected cross sectional area and length. The varying air flow is directed through an outlet chamber shaped to produce an oscillating or a pulsating flow.

Growing community of inventors

Washington D.C., DC, United States of America

Christopher F South