Abstract: The present invention relates to a linear motor which draws its operating power from ultrasonic vibration above the frequency of 20 kHz which is generated by piezoelectric ceramic. More particularly, the invention relates to a linear piezoelectric ultrasonic motor which linearly operates a slider due to a frictional force generated by applying sinusoidal electric field with a 90 degree phase difference to a pair of piezoelectric ceramic. This causes an elliptical mechanical vibration on a shaking beam which is connected to the piezoelectric ceramic.

Abstract: An acoustic driver assembly for use with a spherical cavitation chamber is provided. The acoustic driver assembly includes at least one transducer, a head mass and a tail mass, coupled together with a centrally located threaded means (e.g., all thread, bolt, etc.). The driver assembly is permanently attached to the exterior surface of the spherical cavitation chamber via brazing or diffusion bonding. In at least one embodiment, the transducer is comprised of a pair of piezo-electric transducers, preferably with the adjacent surfaces of the piezo-electric transducers having the same polarity. The surface of the head mass that is adjacent to the external surface of the chamber has a spherical curvature equivalent to the spherical curvature of the external surface of the chamber, thus providing maximum coupling efficiency between the acoustic driver and the cavitation chamber. In at least one embodiment a void filling material is interposed between one or more pairs of adjacent surfaces of the driver assembly.

Abstract: An acoustic driver assembly for use with a spherical cavitation chamber is provided. The acoustic driver assembly includes at least one transducer, a head mass and a tail mass, coupled together with a centrally located threaded means (e.g., all thread, bolt, etc.). The driver assembly is either attached to the exterior surface of the spherical cavitation chamber with the same threaded means, a different threaded means, or a more permanent coupling means such as brazing, diffusion bonding or epoxy. In at least one embodiment, the transducer is comprised of a pair of piezo-electric transducers, preferably with the adjacent surfaces of the piezo-electric transducers having the same polarity. The surface of the head mass that is adjacent to the external surface of the chamber has a spherical curvature greater than the spherical curvature of the external surface of the chamber, thus providing a ring of contact between the acoustic driver and the cavitation chamber.

Abstract: An ultrasonic vibration tool is made of a block of substantially rectangular parallelepiped form, and has its one end face formed as an output end face, and has its other end face opposite the output end face formed as an input end face. An ultrasonic oscillator is connected to the input end face for transmitting a longitudinal standing wave to the output end face. Peripheries of the input and output end faces of the block constitute mass portions. Between the mass portions are formed slits at a pitch less than a half of an oscillation wavelength, whereby a plurality of elastic portions are obtained. The mass portion on the input end face side has a protrusion having a height equal to or less than a quarter of the oscillation wavelength, thereby obtaining a mass distribution. Hence, a uniform amplitude distribution is achieved in the output end face.

Abstract: An ultrasonic horn assembly for applying ultrasonic energy at an operating location which assembly includes a connector between horn assembly components which provides uniform clamping pressure between transfer faces of the components.

Abstract: The invention provides an ultrasonic transducer assembly for a bonding apparatus, comprising a bonding tool mounted to an amplifying horn secured between first and second ultrasonic-generating means. A method of forming a transducer for a bonding apparatus is also provided, comprising the steps of providing an amplifying horn, securing first and second ultrasonic-generating means to the amplifying horn such that the amplifying horn is located between said first and second ultrasonic-generating means and mounting a bonding tool to the amplifying horn.

Abstract: An ultrasonic horn assembly for applying ultrasonic energy at an operating location which assembly includes a connector between horn assembly components which provides uniform clamping pressure between transfer faces of the components.

Abstract: Ultrasonic horns of titanium are made corrosion resistant in aqueous media by the providing the horns with a silver end surface, either as a portion of the end surface or as the entire end surface.

Abstract: An ultrasonic resonator comprising a wire member with an elongated shaft having a proximal end and a distal end, the proximal end further including a filler material disposed within the proximal end; a crimp screw with an annular end and a threaded end, the annular end adapted to receive and fixedly secure the proximal end of the wire member, the annular end being crimped after the proximal end of the wire member is inserted within the annular end of the crimp screw; an ultrasonic transducer adapted to receive the threaded end of the crimp screw; and the ultrasonic transducer operatively connected to an ultrasonic generator.

Abstract: An ultrasonic sealing apparatus comprises at least one horn having an elongated sealing face for sealing a packing material. Plural converters are erected on a side of the horn opposite to the sealing face for resonating the horn with a vibrating frequency. The ultrasonic sealing apparatus has a length that is one wavelength of the vibrating frequency and is fixed in position to a sealing jaw at a nodal plane of the vibrating frequency.

Abstract: The present invention is to provide a spindle structure of an ultrasonic machine which can reduce the number of assembling steps, can improve working accuracy, and can reduce heat generation due to an ultrasonic wave leakage during the working process.

Abstract: A method and apparatus for evaluating the end cap round transducer horn assemblies used in debubbling operations wherein the ECR THA can be evaluated off-line at both high and low power and on-line by making electrical measurements on the ECR THA. The electrical measurements are used to characterize the physical condition of the piezoelectric ceramics of the THA. A test box is employed to practice the method. The test box is connected between the THA and a signal analyzer. Power is supplied to the THA and the electrical signals across the THA are sampled. The sampled electrical signals are transmitted to the signal analyzer while maintaining the amplitude and phase relationship thereof. The sampled electrical signals are used to generate an impedance trace for the particular THA. That impedance trace is compared to a model impedance trace. In such manner, it can be determined whether the ECR THA is operational.

Abstract: An ultrasonic suture device is provided for drilling arc shaped holes through hard materials, such as metals, glass, or bone. The ultrasonic suture device includes a transducer, horn and probe. The probe is constructed of three sections including a stem section, extension section and arc section. The stem section extends along the longitudinal axis of the ultrasonic suture device, while the arc section is constructed in the shape of an arc of a circle and is positioned concentrically with the stem's axis. At the distal extremity of the probe is a tip constructed for drilling into hard materials.

Abstract: A transducer comprised of a resonator and a piezoelectric crystal for cleaning single items such as semiconductor wafers and flat panel displays. The resonator is an elongated piece of material having a cross section that is trapezoidal in shape. The parallel sides of the trapezoid form the top and bottom ends of the resonator and the nonparallel sides of the trapezoid focus the acoustic energy on the bottom end of the resonator.

Abstract: A rotation-symmetric ultrasound horn for producing a circular seal to effect liquid-tight joining together of, for example, packaging container parts. The ultrasound horn is connected to an ultrasound source which supplies the horn axially via a supply end. The horn displays an opposing, tubular working end with a circular work surface. The mean diameter of the tubular part varies along the axis of the horn so that the horn, in the region of the work surface, is of greater mean diameter and cross-sectional area than in a region located between the work surface and the supply end of the horn. As a result of this design and construction, the initially axial ultrasound waves are given a radial component of sufficient amplitude to achieve welding of thermoplastic material along the circular work surface of the horn.

Abstract: A transducer is coupled either directly in a linear relationship, or remotely in an angular relationship, to a focusing element. The transducer and focusing element preferably extend a length at least equal to the diameter of a substrate to be cleaned thereby. The transducer and focusing assembly impart focused megasonic energy to a fluid in contact therewith. Three embodiments of a cleaning system which advantageously employ the transducer/focuser assembly are disclosed. The transducer/focuser assemblies preferably focus megasonic energy in a line across the substrate's surface, the substrate is then scanned past the lines of energy such that the substrate's entire surface is cleaned.

Abstract: A highly efficient and effective ultrasonic nailing and drilling apparatus for various precision use, such as medical or dental surgery, comprises of a piezoelectric transducer means to give an axial thrust and a motor to give a rotation to a bit. Therefore, this ultrasonic nailing and drilling apparatus combines the best of the ultrasound nailing or drilling bit and the best of the rotational drill. The ultrasonic nailing and drilling apparatus further comprises of an elongated horn having an operative tip, wherein a bit can be fixedly attached. The operative tip can be in any form designed to for ultrasonic machines, and even can be in a similar shape as a flat screwdriver tip, as a Phillips head tip, or even as a conventional drill bit.

Abstract: An air cooled ultrasonic apparatus comprises a housing having an air inlet, an air outlet, a first periphery, and a second periphery. A plurality of first and second protrusions radially extend from the first and second peripheries. The housing houses a piezoelectric transducer means and an elongated horn which is operably supported by the first and second protrusions, so that a cooling air is supplied through the air inlet into the housing and discharged through the air outlet, thereby significantly enhancing effectiveness and efficiency for its application to medical, dental and plastic surgery as well as industrial use.