Abstract:
Disclosed is an improved fluid spray-forming device or showerhead which is energy efficient and produces a high fluid velocity and a forceful spray. The device has a relatively large, substantially cylindrical chamber between a restricted input flow path and a spray-forming disk. This combination changes the fluid flow properties to achieve the improved results. A pulsating spray can be obtained by proper selection of the ratios of the input, chamber and output diameters, thus making a mechanical fluid interrupter unnecessary.
Abstract:
A power spray nozzle using a single fluidic oscillator to disseminate liquid, selectively and cyclically, from one end of a floor brush to the other and return.
Abstract:
Liquid fan spray system for cyclically deflecting a liquid jet between extreme positions defined by a pair of end walls is assured of cold weather operation by expanding the liquid power jet. In the preferred embodiment, one boundary wall of the oscillator is tapered about 5.degree. from the power nozzle to the outlet throat, and the outlet or throat has the substantially same cross-sectional area maintained for a given oscillatory angle by closing down the lateral extremities of the outlet throat. This assures cold weather starting when the liquid has increased surface tension and viscosity while at the same time maintaining essentially the same fan angle of the cyclically deflected power jet. The invention is particularly useful in providing all weather oscillation in windshield washer systems for automobiles.
Abstract:
The fluidic oscillator consists of a resonant fluid circuit having a fluid inertance and a dynamic fluid compliance. The inertance is a conduit interconnecting two locations of a chamber on each side of a working fluid jet issuing into one end of the chamber, the inertance conduit serving to transfer working fluid between the two locations. Through one or more output orifices located approximately at the opposite end of the chamber, the fluid exits from a chamber exit region which is shaped to facilitate formation of a vortex (the dynamic compliance) from the entering fluid. The flow pattern in the chamber and particularly the vortex in the chamber exit region provide flow aspiration on one side and surplus of flow on the opposite side of the chamber, which effects accelerate and respectively decelerate the fluid in the inertance conduit such as to cause reversal of the vortex after a time delay given by the inertance. The vortex in the chamber exit region will thus cyclically alternate in velocity and direction of rotation to direct outflow through the output orifice such as to produce a cyclically repetitive side-to-side sweeping stream our spray pattern whose direction is determined, at any instant in time, as a function of the vectorial sum, at the output orifice, of the tangential vortex flow spin velocity vector and the static pressure vector as well as the dynamic pressure component, both directed radially from the vortex. By changing these parameters by suitable design measures and operating conditions and by appropriately configuring the oscillator, sweep angle, oscillation frequency, distribution, outflow velocity, break up into droplets, etc. can be readily controlled over large ranges.
Abstract:
A shower device having a water injecting portion consisted of a nozzle plate having a plurality of nozzles thereon and a cover having water jet holes of the same number positioned respectively to correspond to said nozzles at a given distance. Said nozzles and water jet holes are all tapered to have a smaller diameter towards the outlet side of the device. Between the cover and the nozzle plate, an air chamber is formed by means of which air is sucked in by the gushing water, and jetted out in a state of minute foam mixed with water. When the water jet strikes against one's body, the minute foam ruptures in succession generating minute pulsations and supersonic waves thereby to provide a massage and hot spring bath effect. The shower device is simple, easy to fabricate, and handy to use and disassemble for cleaning.
Abstract:
A liquid discharge nozzle for producing a randomly directionally unstable liquid discharge characteristic includes a body having a chamber therein. An inlet is provided to the chamber. An outlet duct is defined from an end of the chamber to the exterior of the body. The outlet duct has a straight constant diameter first portion communicating from the chamber to a flared second portion of the outlet duct. The duct first portion has a ratio of length to diameter in the range from about 4 to about 18. The diameter of the duct second portion increases proceeding away from the chamber from an initial diameter essentially equal to that of the duct first portion. While the ultimate flare angle of the duct second portion relative to the axis of the duct first portion may exceed 6.degree., if the ultimate flare angle is greater than 6.degree. then the duct first and second portions are coupled directly by a transition flare in which the ultimate flare angle is developed transitionally in at least one transition section having a flare angle in the range of about from 2.degree. to no more than 6.degree.. The chamber is defined in cooperation with the positions of the inlet and outlet duct relative to each other for substantially linear flow of liquid through the duct first portion during operation of the nozzle.
Abstract:
Fluid flows tangentially into a curvilinear vortex chamber, creating a central cavitation region; the vortex flow creates a pressure wave at the entrance of a closed-end resonant chamber, which reflects from the closed end of the resonant chamber and propagates substantially radially into the vortex chamber, which increases the fluid static pressure above the vapor pressure of the gas or in the region of cavitation, causing a sudden cessation of cavitation. This, in turn, creates a high pressure wave characterized by acoustical frequencies of a random nature (like white noise), which forces the liquid out of an exit orifice with extremely turbulent flow. When exited into a gaseous environment (such as atmosphere), the stream tends to break up into droplets, each of the droplets having acoustical waves of random yet high frequencies therein; the acoustical waves within the drops tend to assist the formation of droplets as a result of flow sheer. When exited into a liquid, emulsification, outgasing, cleansing and other acoustic functions are enhanced. A second embodiment uses dynamic flow forces to collapse the cavitation region.
Abstract:
A remotely-controlled lawn water sprinkler which is designed to provide an infinite spray pattern adjustment from a safe distance outside the spray pattern and which permits the sprinkling of areas of lawn with defined boundaries such as rectangular areas, the device utilizing a fluidic control switch for shifting the spray from one portion of an area to another and utilizing also a multiple passage hose for facilitating the control.