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公开(公告)号：US11548479B2
公开(公告)日：2023-01-10
申请号：US15769105
申请日：2016-10-19
Applicant: DLHBOWLES, INC.
Inventor： Shridhar Gopalan , Chunling Zhao , Zachary Kline
Abstract: A micro-sized structure and construction method for a fluidic oscillator wash or spray nozzle (100 or 250) has a nozzle housing (110 or 252) enclosing an interior cavity (112 or 262) which receives an insert (114 or 254) having internal fluid passages defining first and second power nozzles (120, 122 or 280, 282). The power nozzles receive pressurized fluid (130) flowing through the interior cavity of the housing, where the fluid flows into the cavity at the bottom of the housing and flows upwardly to inlets (140, 142) for the power nozzles so that accelerating first and second fluid flows are aimed by the power nozzles toward one another in an interaction region (154 or 284) which exhausts laterally along a spray axis through a horn-shaped throat defined partly within the insert and partly within the flared spray outlet orifice (160 or 290) defined through the sidewall (162) in the housing.
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公开(公告)号：US20210368700A1
公开(公告)日：2021-12-02
申请号：US17402868
申请日：2021-08-16
Applicant: DLHBOWLES, INC.
Inventor： Benjamin D. Hasday , Gregory A. Russell , Shridhar Gopalan , Christopher F. South
IPC: A01G25/02
Abstract: 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 allows 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.
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公开(公告)号：US20180343813A1
公开(公告)日：2018-12-06
申请号：US16001432
申请日：2018-06-06
Applicant: DLHBOWLES, INC.
Inventor： Benjamin D. Hasday , Gregory A. Russell , Shridhar Gopalan , Christopher F. South
IPC: A01G25/02
CPC classification number: A01G25/023
Abstract: 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.
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公开(公告)号：US10066351B2
公开(公告)日：2018-09-04
申请号：US15687162
申请日：2017-08-25
Applicant: DLHBOWLES, Inc.
Inventor： Shridhar Gopalan , Dharapuram N Srinath , Christopher South
Abstract: An oscillating or pulsing fluid stream, or flow 18, 132, 300, is produced from a flow of pressurized air by fluidic apparatus 10, 100, 130, 180, 220 in a device 250 configured for use in surface cleaning, sweeping, lawn care applications, and the like. Converging inlet chamber walls 20, 22, define a tapered internal lumen having a smooth narrowing profile is configured to generate at a power nozzle 44 a high velocity stream with minimal pressure drop. Downstream of the power nozzle, first and second control ports CP1, CP2 are in fluid communication with the high velocity stream 46 and with each other via an inertance loop 72 having a lumen of selected cross sectional area and length. The varying air flow is directed through an outlet chamber 14, 134 shaped to produce an oscillating flow 18 or a pulsating flow 132.
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公开(公告)号：US09987639B2
公开(公告)日：2018-06-05
申请号：US14535557
申请日：2014-11-07
Applicant: DLHBOWLES, INC.
Inventor： Gregory Russell , Shridhar Gopalan , Christopher South , Russell Hester , Eric Koehler , Kerrie Allen , Srinivasaiah Sridhara
CPC classification number: B05B1/02 , A01G25/00 , B05B1/08 , B05B1/14 , B05B1/304 , B05B15/65 , B05B15/70 , B05B15/74
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20180029566A1
公开(公告)日：2018-02-01
申请号：US15433883
申请日：2017-02-15
Applicant: dlhBowles, Inc.
Inventor： Shridhar Gopalan , Chunling Zhao , Andrew Cameron
CPC classification number: B05B15/68 , B05B1/04 , B05B1/046 , B05B1/10 , B05B1/267 , B60S1/46 , B60S1/52
Abstract: A very compact nozzle assembly 100, 200, 300 and spray head for an automotive washer nozzle is configured for inclusion into an automotive trim component. The compact nozzle assembly and spray head generate a very effective cleaning spray at a selected spray fan angle, yaw angle and roll angle and, in an exemplary embodiment, the spray fan is dual shear shaped, producing an even distribution, which may be varied from 30° to 120°. Spray head may be as small as 5 mm in diameter and be aimed to provide a spray with various spray aim, yaw and roll angles. The design accounts for better mold ability and versatility of application.
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公开(公告)号：US11305297B2
公开(公告)日：2022-04-19
申请号：US16000141
申请日：2018-06-05
Applicant: DLHBOWLES, INC.
Inventor： Edward Han , Shridhar Gopalan , Chunling Zhao
Abstract: The invention relates to various low flow rate fluidic nozzle inserts having a reverse mushroom-shaped mushroom insert geometry that are useful for a wide range of spraying and cleaning applications. In one embodiment, the present invention relates to fluidic nozzle inserts that are able to perform at low flow rates with geometrical and dimensional limitations. In still another embodiment, the present invention relates to compact fluidic nozzle inserts that provide a manner by which to attain a desired level of performance in a fluidic nozzle assembly for small scale applications at low flow rates.
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公开(公告)号：US11116151B2
公开(公告)日：2021-09-14
申请号：US16001432
申请日：2018-06-06
Applicant: DLHBOWLES, INC.
Inventor： Benjamin D. Hasday , Gregory A. Russell , Shridhar Gopalan , Christopher F. South
IPC: A01G25/02
Abstract: 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.
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公开(公告)号：US11104305B2
公开(公告)日：2021-08-31
申请号：US16235459
申请日：2018-12-28
Applicant: DLHBOWLES, INC.
Inventor： Chunling Zhao , Shridhar Gopalan
Abstract: The present disclosure relates to automated or remotely controlled methods and apparatuses for cleaning and drying soiled external 2-D or 3-D image sensor surfaces such as objective lenses on Light Detection and Ranging (“LIDAR”) sensors when mounted in a configuration that is exposed to dirty environments.
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公开(公告)号：US10987681B2
公开(公告)日：2021-04-27
申请号：US15759242
申请日：2017-11-16
Applicant: DLHBOWLES, INC.
Inventor： Chunling Zhao , Shridhar Gopalan , Zachary Kline
Abstract: A miniature low-flow, fluid conserving washer nozzle has an elongated housing enclosing an interior volume aligned along an inlet axis which receives an elongated insert member with internal fluid passages defining first and second power nozzles, so that accelerating first and second fluid flows are aimed by the first and second power nozzles toward one another in an interaction region defined within the insert with an insert throat to aim spray laterally or transversely along a spray axis through an aligned sidewall aperture in the nozzle housing. The nozzle may generate a planar oscillating sweeping fan of spray, produced by fluidic oscillations at low flow rates, typically 150-300 ml/min at 25 psi. The fan of spray generated may be varied from 20° to 70° or about 15°-60°. The outer dimensions of spray head could be as small as 3.5 mm. The fluidic geometry is also capable of spraying high viscosity liquids up to 25 CP or up to 15 CP.
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