An injection device includes: an injection nozzle injecting an injection agent into a target container, and a vibration generating device vibrating the injection nozzle in a plurality of directions during injection of the injection agent.

An ultrasonic vibrator driving apparatus applies a sine-waveform alternating voltage as a drive voltage via a conversion circuit to an ultrasonic vibrator that has a unique resonance frequency. A first current detector that detects a first current that flows from the drive voltage generator to the conversion circuit and a second current detector that detects a second current that flows from the conversion circuit to the ultrasonic vibrator are included. A frequency controller performs control on the drive voltage generator to change the frequency of a square-waveform alternating voltage so that the difference between the first current and the second current is reduced or approaches a minimum.

An ultrasonic vibrator driving apparatus performs driving by applying an alternating voltage as a drive voltage to an ultrasonic vibrator that includes a piezoelectric element and has a unique resonance frequency. The drive voltage is generated with a variable frequency in a frequency range including the resonance frequency of the ultrasonic vibrator. The frequency of the drive voltage is repeatedly swept with a predetermined sweep width and a predetermined sweep period so as to include the resonance frequency, based on a reference frequency set according to the resonance frequency of the ultrasonic vibrator. The sweep period and the sweep width are restricted by being associated so as to fall within a predetermined allowed range on a two-dimensional map divided by the sweep period and the sweep width.

A mesh nebulizer that nebulizes and ejects a medicinal liquid through a mesh portion, includes a main body including a vibration portion including a vibration surface, and a medicinal liquid pack to be detachably mounted on the main body. The medicinal liquid pack includes a lid in which the mesh portion is provided, and a medicinal liquid container that includes a recessed portion that is open toward the mesh portion and is covered by the lid, the medicinal liquid being contained in the recessed portion. At least a portion of a bottom surface of the recessed portion of the medicinal liquid container that is to oppose the vibration surface is made of a stretchable material. When the medicinal liquid pack is mounted on the main body, the stretchable material of the bottom surface stretches, allowing the vibration surface to approach the mesh portion of the lid.

A washer nozzle for a vehicle is provided. The washer nozzle improves an ejection disorder due to external freezing of a washer ejection port that ejects washer fluid. The washer nozzle, removes ice and foreign substances frozen onto the surface of a washer ejection port by utilizing an ultrasonic vibration generated by an ultrasonic transducer disposed within an interior of the washer nozzle. The washer nozzle includes a nozzle cover with washer ejection ports and a nozzle body with washer fluid passages. The ultrasonic transducer is configured to generate an ultrasonic vibration disposed within the nozzle body. The ultrasonic transducer disposed beneath the lower portion of the washer ejection ports is configured to provide ultrasonic vibration toward the washer ejection ports.

A method of prepping a cylindrical inner surface of a bore using a high-frequency forced pulsed waterjet apparatus entails generating a pressurized waterjet using a high-pressure water pump, generating a high-frequency signal using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip to vibrate to thereby generate the high-frequency forced pulsed waterjet, and rotating the rotatable ultrasonic nozzle inside the bore to prep the inner cylindrical surface of the bore using the high-frequency forced pulsed waterjets exiting from the angled exit orifices of the rotatable ultrasonic nozzle.

A unit dose capsule for use with a sonic generator includes a deformable membrane adapted to releasably engage the distal end of the elongate horn, a nozzle including at least one delivery opening; a nozzle including at least one delivery opening; and a reservoir containing a liquid composition disposed therebetween. When the unit dose capsule is engaged to the distal end of the elongate horn, the nozzle is disposed in an outwardly facing orientation, and the reservoir is in liquid communication with the at least one nozzle. The unit dose capsule can be included in a kit with a handheld misting device comprising a housing having a dispensing window arranged and configured to contain a sonic generator and a power source.

Disclosed is a piezoelectric two-phase flow ultrasonic atomization nozzle, comprising a piezoelectric vibrator (6), an amplitude transformer (8), a second end cap (12) and a first end cap (14). The piezoelectric vibrator (6) and the amplitude transformer (8) are connected via a connecting bolt (4). An air inlet connector (2) is installed at a tail portion of the connecting bolt (4). The second end cap (12) is fixed to the front end of the amplitude transformer (8). A Laval type valve core (9) is fixed in a stepped hole of the amplitude transformer (8) and a groove of the second end cap (12). A liquid inlet hole (10) is arranged in a wall face of the stepped hole of the amplitude transformer (8). A plurality of flow guide holes (11) is formed at the positions, close to an outlet, of the Laval type valve core (9) in the radial direction. The second end cap (12) is connected to the first end cap (14) in a threaded manner. A radial positioning ring (20) is arranged at a snapping groove of the back end of the first end cap (14). A step type taper valve (21) is installed on the radial positioning ring (20). The step type taper valve (21) and a vibration baffle (19) are connected via an adjusting bolt (16). A resonance chamber (17) is formed between the vibration baffle (19) and the top end of the first end cap (14). A plurality of hoses (15) is arranged in the resonance chamber (17). According to the piezoelectric two-phase flow ultrasonic atomization nozzle, a large number of superfine fog droplets can be generated in a low-energy-consumption operating condition, and the shortcoming that large atomization amount, small grain size, low energy consumption and directed spraying cannot be considered at the same time in the traditional technology is overcome.

A method of prepping a cylindrical inner surface of a bore using a high-frequency forced pulsed waterjet apparatus entails generating a pressurized waterjet using a high-pressure water pump, generating a high-frequency signal using a high-frequency signal generator, applying the high-frequency signal to a transducer having a microtip to cause the microtip to vibrate to thereby generate the high-frequency forced pulsed waterjet, and rotating the rotatable ultrasonic nozzle inside the bore to prep the inner cylindrical surface of the bore using the high-frequency forced pulsed waterjets exiting from the angled exit orifices of the rotatable ultrasonic nozzle.

A compact apparatus for atomisation of fluid samples comprises a sonotrode (11), placed so that an ultrasonic wave emitted by the sonotrode is directed through a channel (25) in a separate channel device (21) and reflected by from the interface (26) in a high-low impedance transition zone (Tz), so that a standing wave is formed within the channel. A positive air flow through the channel, driven by a pressure differential at each end of the channel, interacts with the working fluid or slurry being delivered by a fluid delivery device (30) to atomise it. The speed of the air flow and the dispersal, homogeneity, and size of particles in the slurry sample can be controlled by varying the shape of the channel outlet.