Abstract:
A fluidic flow meter comprising a fluidic oscillator having an oscillation chamber, a power nozzle for issuing a jet of fluid into the oscillation chamber, an outlet for issuing fluid from the oscillation chamber. A bendable fiber optic wave guide loop has a section adapted to lose light, as a result of flexing or bending, is mounted in a flow path in the oscillation chamber and subjected to oscillatory flow of the fluid. Light is injected into one end of the fiber optic wave guide and a detector senses the oscillatory loss of light in the fiber optic wave guide as a measure of fluid flow through the fluidic oscillator.
Abstract:
Fluidic transducers of electrical signals from an electronic computer to accurately switch flow of a liquid to a utilization device. A liquid filled hollow channel (166 and 166') is accelerated along the flow axis thereof to produce a fluid control signal for a bistable fluidic switch element (112) with a cross-over type interaction channel (42) and a common outlet (45) to a pair of output passageways (147 and 148). In a preferred embodiment, electrical signals from an electronic computer (220) are supplied to a coil (170) centered by a spring (190 and 191) in a magnetic field, first in one direction of current flow and then in the opposite direction, to introduce bidirectional movement of the coil (170) and the hollow channel means (166 and 166') coupled thereto. The signals are preferably frequency modulated (205) (but may be pulse width modulated).
Abstract:
17 vide partiel produit dans le passage d'admission d'une chambre à tourbillon est utilisé pour déplacer le liquide d'un compartiment à un autre afin de maintenir le niveau de liquide dans au moins l'un des compartiments en deçà d'un niveau prédéterminé du liquide dans l'autre compartiment. Dans un mode de réalisation, l'unité de tourbillon (14) ou un autre organe d'aspiration développe un vide partiel à la hauteur maximale d'un tube de syphon (8) s'étendant entre les deux chambres, le vide aspirant le fluide des deux ou au moins de l'une des deux chambres vers le sommet du tube (8) amorçant ainsi l'effet de syphon. Une pompe de mines (6) possédant une pression négative insuffisante pour faire monter le liquide à la hauteur maximale du tube de syphon (8) est utilisée pour amener le liquide à une charge et, de concert avec l'unité de tourbillon (14), pour établir le vide partiel requis par l'amorçage de l'effet de syphon. L'unité de tourbillon (50) peut également être logée dans le tube de syphon (52, 54) et peut être utilisée comme pompe pour amener le liquide d'un compartiment seulement à un autre ou, dans un autre mode de réalisation, comme syphon pour déplacer le liquide dans les deux directions pour maintenir les niveaux du liquide dans les deux récipients à une différence de hauteur prédéterminée l'un par rapport à l'autre.
Abstract:
A conformal, cup-shaped fluidic oscillator spray nozzle member (100, 200, 300, 400, 500) is configured to generate one or more oscillating sprays from fluid flowing into a substantially open proximal end and distally into a substantially closed distal end wall with one or more centrally located orifices defined therein. A multi-input, multi-output cup-shaped fluidic oscillator ( 200, 300, 400) is configured to generate a selected fluid spray from a plurality of (e.g., 2-8) fluid product inlets which are configured in interacting pairs and feed into a common interaction region of the fluidic nozzle geometry. Optionally, an outlet "A" can be positioned in the interaction region and allow for air entrainment into the interaction region or external oscillating spray streams to generate a foamed spray of fluid product.
Abstract:
A conformal, cup-shaped fluidic nozzle engineered to generate an oscillating spray is configured as a (e.g., 100, 400, 600 or 700). Preferably, the fluidic circuit's oscillation inducing geometry 710 is molded directly into the cup's interior wall surfaces and the one-piece fluidic cup may then fitted into an actuator (e.g., 340). The fluidic cup (e.g., 100, 400, 600 or 700) conforms to the actuator stem used in typical aerosol sprayers and trigger sprayers and so replaces the prior art "swirl cup" 70 that goes over the actuator stem (e.g., 320), With the fluidic cup (e.g., 100, 400, 600 or 700) and method of the present invention, vendors of liquid products and fluids sold in commercial aerosol sprayers 20 and trigger sprayers 800 can now provide very specifically tailored or customized sprays.
Abstract:
An improved fluidic oscillator (2), that operates on a pressurized liquid flowing through the oscillator to generate a liquid jet that flows into the surrounding gaseous environment to form of an oscillating spray of liquid droplets, includes: a member into which is fabricated a two-portion, flow channel, with its first portion configured so as to create the flow phenomena in the member that yields the spray's oscillating nature, and its second portion includes a splitter (22) that is used to divide the jet into component sprays whose centerlines assume a specified yaw or pitch angle relative to the centerline of the oscillator.
Abstract:
An improved fluidic insert, that operates on a pressurized liquid flowing through the insert (1) to generate a jet of liquid that flows from said insert and into the surrounding gaseous environment to form a spray of liquid droplets, includes: (a) a member (2) having top, front and rear outer surfaces, (b) a fluidic circuit located within this top surface and having an inlet (4), an outlet (8) and a channel (3) whose floor and sidewalls connect the inlet and outlet, and a barrier (5), located proximate the outlet, that rises from the channel floor and is configured such that: (i) it divides the channel in the region of the barrier into what are herein denoted as two power nozzles (3a, 3b), and (ii) each of these nozzles has a downstream portion that is configured so as to cause the liquid flowing from the nozzles to generate flow vortices behind the barrier (5) that are swept out of the outlet in such a manner as to control the lateral rate of spread of liquid droplets from the insert,
Abstract:
An improved fluidic spray device that provides for end-user adjustment of the direction of the spray that issues from the device; in a preferred embodiment this device includes: (a) a base (12) having a top (14) surface which has a plurality of projections (26) extending from it and which are configured and spaced so as to provide the interior geometry of a fluidic circuit having a power nozzle (4d) and an interaction region (4j) located downstream of the power nozzle, (b) a secondary housing (30) having an outer surface (34) that includes a front (40) and a rear (38) face, an intermediate boundary surface (31) that connects these faces and has a portion (32) with spherical-shaped curvature, and a passage (36) that extends between the faces and whose rear portion (36d) defines a cavity configured to accommodate the insertion of this base (12) and whose front (36c) portion is configured so as to form a throat (4k) for the fluidic circuit, and (c) a primary housing (50) having an outer surface with a front face (56) that includes an opening (58) to a cavity (60) that has an interior boundary surface (64), a portion (62) of which has sphere-shaped curvature comparable to that of the secondary housing's sphere-shaped portion (32), that is configured to accommodate the secondary housing (30) in such a manner that their adjoining surfaces (32, 62) provide a ball and socket type of fitting that allows spray directional adjustments.
Abstract:
A fluidic insert (18) that receives fluid under pressure from a fluid inlet tube (14) and generates a specified spatial distribution of the fluid exiting the insert includes: (1) a body member (22) having top, bottom, front and rear outer surfaces; (2) top (28) and bottom (30) fluidic circuits located, respectively, at least partially within the member’s top and bottom surfaces, wherein each of these circuits has at least one power nozzle (32), an interaction chamber (34), and an outlet (36) whose exit lies within the member front surface, (3) the bottom fluidic circuit (30) having a portion of its surface area located upstream of the power nozzle and adapted so that it can mate with a fluid inlet tube (14) that supplies fluid to the insert, and (4) an inter-circuit flow passage (42) that allows fluid to flow from the bottom fluid circuit to the top fluid circuit, the bottom end of this passage (42) located such that it is downstream of the point where the inlet tube (14) mates with the bottom circuit (30) and upstream of the bottom circuit’s power nozzle, with the top end of this passage (42) located upstream of the top circuit’s power nozzle.
Abstract:
A vehicle windshield defrost system utilizes a fluidic oscillator for sweeping a jet of heated air across the windshield. The fluidic oscillator is of the type having an interaction chamber (20) with sidewalls which converge to a common outlet (21) to form a crossover type output region and thereby reduce the amount of space on the dashboard normally occupied by an output funnel.