Abstract:
A filtering nozzle assembly or spray head has a conformal nozzle component engineered to generate a filtered spray and configured as a small cylindrical member having a substantially open proximal end and a substantially closed distal end wall with a centrally located discharge orifice defined therein. Optionally, cup-shaped filtered orifice defining member also includes a fluidic circuit's oscillation inducing geometry molded into the cup or directly into the distal surface of a sealing post and the one-piece filter cup provides the fluidic circuit's discharge orifice.
Abstract:
An external lens washing system has an aiming fixture configured to support and constrain an external lens which is exposed to the elements and apt to become soiled with debris. A nozzle assembly is configured to be supported and aimed toward the external lens by the aiming fixture and has at least one laterally offset washing nozzle projecting from the aiming fixture to a spray washing fluid toward the external lens surface, spraying at a shallow, glancing spray aiming angle to impinge upon and wash the lens external surface. Optionally, an integrated image sensor and lens washing assembly is configured for use with a remote control method for cleaning an exterior objective lens surface and includes a sealed image sensor housing assembly including an integral, remotely controllable lens cleaning system with an optimized configuration for aiming one or more cleansing sprays from one or more laterally offset fluidic oscillators.
Abstract:
A pop-up external lens washing system has an extendable aiming fixture configured to aim a lens cleaning spray at an external lens which is exposed to the elements and apt to become soiled with debris. The extendable nozzle assembly is configured to be aimed toward the external lens by the extended aiming fixture during the washing operation only and has at least one laterally offset washing nozzle projecting from the aiming fixture to a spray washing fluid toward the external lens surface, spraying at a shallow, glancing spray aiming angle to impinge upon and wash the lens external surface.
Abstract:
A fluidic device (1), that operates on a pressurized liquid flowing through it to generate an oscillating spray having desired three-dimensional flow characteristics, includes a member that has fabricated within it at least two liquid flow channels (12, 14) that are configured in the form of a fluidic circuit having an inlet and an outlet (16, 18) and a centerline therebetween. These flow channels are further configured so that the straight line projections of their centerlines, that extend from their outlets, intersect at a prescribed intersection angle, theta, and the outlets are separated by a characteristic separation distance, 'w'. The values of the intersection angle, theta, and separation distance, 'w', can be chosen so as to yield the desired three- dimensional flow characteristics of the spray.
Abstract:
For those spray applications that use a fluidic oscillator of the type that generates a spray by having a pressurized liquid flow through the oscillator and exhaust into a surrounding environment, and where such an oscillator has a boundary surface which has fabricated into it a channel in the form of what is referred to herein as fluidic circuit, an improved enclosure for this oscillator includes: a body having an interior and an exterior surface, wherein a portion of this interior surface is configured to attach to the oscillator boundary surface so as to form with the oscillator's channel an enclosed pathway through which the to-be-sprayed liquid may flow, and wherein a segment of this interior surface is configured so as to yield specified properties of the resulting spray.
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:
A fluidic insert that receives fluid under pressure from a fluid inlet tube and generates a specified spatial distribution of the fluid exiting the insert includes: (1) a body member having top, bottom, front and rear outer surfaces, (2) top and bottom 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, an interaction chamber, and an outlet whose exit lies within the member front surface, (3) the bottom fluidic circuit 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 that supplies fluid to the insert, and (4) an inter-circuit flow passage that allows fluid to flow from the bottom fluid circuit to the top fluid circuit, the bottom end of this passage located such that it is downstream of the point where the inlet tube mates with the bottom circuit and upstream of the bottom circuit's power nozzle, with the top end of this passage located upstream of the top circuit's power nozzle.
Abstract:
A fluidic oscillator includes a member having an oscillation inducting chamber (IC), at least one source of fluid (SF) under pressure, at least a pair of power nozzles (FH1, FH2) connected to the at least one source of fluid under pressure for projecting at least a pair of fluid jets into the oscillation chamber, and at least one outlet from the oscillation chamber for issuing a pulsating jet of fluid to a point of utilization or ambient. A common fluid manifold connected to said at least a pair of power nozzles. The shape of the power nozzle manifold forms one of the walls of the interaction or oscillation chamber. In some of the fluidic circuits, the length can be matched to fit existing housings. The power nozzle can have offsets which produce yaw angles in a liquid spray fan angle to the left or right depending on the direction desired. In some embodiments, the exit throat is off axis (off the central axis of the symmetry) by a small fraction to the left or right to move the leftward or rightward yaw angles in the spray. The outlet throat (BX) may be offset along the longitudinal axis by a small amount to produce a yaw angle of predetermined degree to the left or right depending on what is desired. Thus, one can construct circuits for yaw using a combination of the techniques described above which suits most applications.
Abstract:
A fluidic oscillator and method in which a first molded portion (30) comprises a first part having an oscillator circuit silhouette formed in one surface. The oscillator circuit silhouette has a power nozzle (15'), an oscillation chamber (16), with upstream and downstream ends, a power nozzle at the upstream end adapted to receive a liquid under pressure and an outlet to ambient at the downstream end, and oscillation inducing elements (17, 18) in the oscillation chamber. A closure seal plate part (32) is hingedly connected to the fist part such that the closure seal plate can engage the oscillation silhouette. A second molded portion has a recess (47, 48) adapted to forcibly receive the first portion with the closure seal plate engaging the oscillation silhouette. Interfitting protuberances (45, 46) and recesses prevent sliding between the first part and the closure seal part when they are forced into the recess.
Abstract:
A windshield washer system wherein a nozzle is mounted on the hood (H) of a vehicle and issues a jet of washer fluid in the ambient toward the windshield (W). The nozzle has a housing (E) and a projecting surface, air deflector or tab (T) formed with or attached to the nozzle housing (E) for aerodynamically assuring that the washer fluid impinges on the windshield (W) in a predetermined area thereon at speeds above a predetermined minimum. In preferred embodiments, the projecting surface, air deflector or tab (T) projects from about 6 mm to about 12 mm above the nozzle housing (E).