7040 results about "Ultrasonic generator" patented technology

A temperature monitoring device and/or method which control the tissue temperature at the end-effector of a therapeutic ultrasonic cutting and coagulating instrument as the tissue is being heated with ultrasonic vibrations from the end-effector. One or more temperature sensors are located at the end-effector, preferably on a clamping member. The temperature sensors measure the temperature of the tissue engaged by the end-effector either directly or indirectly. An alternate method and apparatus provides an electrical tissue impedance measure in combination with an ultrasonic cutting and coagulating instrument to provide active feedback control of an ultrasonic generator.

An ultrasonic surgical instrument for dissection and coaguation of tissue is provided. The surgical instrument includes a vibration coupler supported within a housing and operably connected to an ultrasonic generator. An angled blade member is connected to the distal end of the vibration coupler to conduct high frequency vibration from the ultrasonic generator to the blade member. A clamp member is positioned adjacent to the blade member and is movable from a first position to a second approximated position. The clamp member and angled blade member combine to enhance contact between the tissue and the blade member during operation of the instrument to improve the performance of the instrument.

An ultrasonic surgical system has an ultrasonic unit including an instrument operatively connected to an ultrasonic generator, wherein the instrument has an ultrasonic end effector on the distal end of a shaft. The system further includes a positioning unit including a movable arm adapted for releasably holding the instrument, whereby an operator may direct the positioning unit to position the end effector at a surgical site inside a body cavity of a patient for performing a plurality of surgical tasks. The system further includes a control unit operatively connected to the ultrasonic and positioning units, wherein the control unit is programmable with a surgical subroutine for performing the surgical tasks. The system further includes a user interface operatively connected to the control unit for initiating an operative cycle of the surgical subroutine such that the surgical tasks are automatically performed during the operative cycle.

The ability of an ultrasonic system to sweep and lock onto a resonance frequency of a blade subjected to a heavy load at startup is improved by applying a high drive voltage or a high drive current while systematically increasing the level of the applied signal. Increasing the drive signal to the hand piece results in an improved and more pronounced “impedance spectrum.” That is, under load, the increased drive signal causes the maximum phase margin to become higher and the minimum/maximum impedance magnitude to become more pronounced. Increasing the excitation drive signal to the hand piece/blade at startup significantly alleviates the limiting factors associated with ultrasonic generators, which results in an increase of the maximum load capability at startup.

An ultrasonic surgical instrument for dissection and coagulation of tissue is provided. The surgical instrument includes a vibration coupler supported within a housing and operably connected to an ultrasonic generator. An angled blade member is connected to the distal end of the vibration coupler to conduct high frequency vibration from the ultrasonic generator to the blade member. A clamp member is positioned adjacent to the blade member and is movable from a first position to a second approximated position. The clamp member and angled blade member combine to enhance contact between the tissue and the blade member during operation of the instrument to improve the performance of the instrument.

An instrument for ablation of tissue. The instrument including: a body having at least one surface for contacting a tissue surface, the at least one surface being substantially planar; an ultrasonic transducer disposed in the body for generating ultrasonic energy and directing at least a portion of the ultrasonic energy to the tissue surface, the ultrasonic transducer being operatively connected to an ultrasonic generator; at least one radio-frequency electrode disposed on the at least one surface for directing radio frequency energy to the tissue surface, the at least one radio-frequency electrode being operatively connected to a power source; and one or more switches for selectively coupling at least one of the ultrasonic transducer to the ultrasonic generator and the at least one radio-frequency electrode to the power source.

A portable ultrasonic scalpel/cautery device is disclosed. According to one embodiment of the present invention, the ultrasonic surgical instrument includes a low voltage battery-powered ultrasonic generator and a handheld ultrasonic surgical instrument. The battery-powered ultrasonic generator generates an ultrasonic signal having a frequency of about 55 kHz.

An ultrasonic surgical instrument having a deflection detection circuit is disclosed. The instrument includes an ultrasonic probe configured to conduct electricity and positioned a predetermined distance from one or more tubes. The ultrasonic probe is adapted to be operatively connected to an ultrasonic generator for vibration. The instrument also includes a deflection detection circuit having a secondary power source and an indicator, the power source is configured to supply electrical current to the tube, the probe, and the indicator, wherein the circuit is configured to close in response to the probe contacting the tube when the probe is deflected toward the tube thereby activating the indicator.

An automatic charging system of a robot cleaner includes: a rotating plate installed at a robot cleaner; an infrared ray receiving unit mounted at the rotating plate and receiving an infrared signal generated from a power supply unit while being rotated; a microcomputer for moving the robot cleaner to the power supply unit on the basis of the received infrared signal; and an ultrasonic generator for generating a stop signal when the robot cleaner nears to the power supply unit. A robot cleaner can be accurately and quickly moved to a power supply unit for a rapid charging operation, and a cost for implementing the robot cleaner can be reduced.

The start up performance of an ultrasonic system under zero load conditions is improved by setting a phase set point in a frequency control loop such that, at start up under zero load conditions, the phase set point intersects a point on a phase-frequency response curve which has a low positive slope. This intersection point on the phase-frequency response curve changes as the load is increased and the system Q is decreased. The controller “seeks” a target 0° impedance phase angle. The frequency of the ultrasonic generator is set to an off-resonance frequency which is lower than the resonance of any known hand piece/blade combination. In order for the drive voltage to not exceed the physical limit of the system, the drive current is set to a low level. The drive frequency is then smoothly increased in steps until the target 0° impedance phase delta is located.

An ultrasonic-magnetorheologic polishing method features that the mixture of abrasive material and magnetorheologic liquid is filled in a small-diameter rotary hollow polishing head and a magnetic field is applied to it to make the magnetorheologic liquid become flexible polishing liquid on the polishing head while the ultrasonic vibration is applied to it for higher polishing effect. Its apparatus is composed of polishing head, ultrasonic generator, and electromagnet.

An apparatus analyzes information indicative of a characteristic of a region to be examined an object. The apparatus comprises an ultrasound generator generating an ultrasound wave toward the region within the object and a light generator generating light toward the region. The ultrasound sound generated is transmitted toward the region. The apparatus further comprises a light receiver, information acquiring unit, and information producer. The light receiver receives light coming from the region and outputting an electric signal corresponding to the received light. The information acquiring unit acquires information indicative of scattering of the light at the region by using either the signal outputted from the light receiver or the light coming from the region. The information producer produces the information indicative of the characteristic of the region based on the scattering information acquired by the information acquiring unit.

The invention utilizes a multiple frequency ultrasound generator driving a multiple frequency harmonic transducer array to improve cleaning and processing effects while eliminating damage to parts being cleaned. An AC switch and circuitry to modify the output of an ultrasound generator in combination with techniques such as random AM and FM signals are used to produce ultrasound waves that have no single frequency components which eliminates exciting parts being cleaned into resonance. Generator signals that increase cavitation efficiency and that have successive time periods with predominately stable cavitation and predominantly transient cavitation further improve the performance of the cleaning or processing systems.

The present invention is a device for the destruction of adipose tissue comprising two or more ultrasound generators positioned on opposing sides of the treatment area each generating a non-focused wave that converge forming a interferential clash zone with the treatment area therein. Ultrasound generators are contained within a handpiece housing. Furthermore the present invention provides an optional housing having a source of vacuum for encompassing a treatment area whereby the treatment area is drawn bell-shaped into the housing whereupon a pair of shock wave generators are energized to produce cavitational areas within the treatment area and a third interferential energized area between the cavitational areas.

The vibrating electrostatic spinning set for nanometer fiber includes one container for holding spinning solution or melt, one high voltage electrostatic generator, one ultrasonic generator, and one piezoelectric sensor. The container is one cubic liquid storage tank with upper opening; and the piezoelectric sensor is set in the bottom of the tank and connected with the ultrasonic generator outside the tank. Over the liquid storage tank, there are one nanometer fiber conveyer and one nanometer fiber receiver, the conveyer includes guide roll, earthed electrode and conducting plate connected to the earthed electrode to form the negative pole; one electrostatic field is formed between the negative pole and the solution or melt inside the tank connected through electric plate to the high voltage electrostatic generator; and the receiver is one receiving screen. The present invention is used for producing nanometer fiber and has high production efficiency.

The invention provides an ultrasonic generator, a screen sounding device, a sounding display screen, a manufacturing method thereof and a screen sounding system. The screen sounding device comprises asubstrate, a lower electrode layer, an ultrasonic generating unit array and an upper electrode layer arranged in order from bottom to top, wherein the substrate is used for providing support for thescreen sounding device; the lower electrode layer is disposed on the upper surface of the substrate and includes a lower electrode for supplying the working voltage of each ultrasonic generating unitin the ultrasonic generating unit array. The ultrasonic generating unit array is arranged above the low electrode layer and includes a plurality of ultrasonic generating unit arranged according to a preset ultrasonic pattern; the upper electrode lay is disposed above thet ultrasonic generating cell array and includes an upper electrode for supplying an operating voltage of each ultrasonic generating unit in the ultrasonic generating unit array. Thus, the space occupation of the sound producing device is reduced, the sound producing device is convenient to be integrated with the display panel,and directional sound producing can be realized.

A novel method and apparatus for riveting a two-piece suture tray package. A two-piece suture tray assembly is provided having a top member and a bottom member. The top member has a top and a bottom, and plurality of rivet members extending down from the bottom of the top member. The rivet members have free ends. The bottom member has a top and a flat bottom surface, and a plurality of rivet receiving openings extending therethrough. A counterbore surrounds each rivet receiving opening in the flat bottom surface. An ultrasonic riveting apparatus is provided having a clamp member with a cavity, and an ultrasonic horn member having a flat bottom moveably mounted in the cavity The assembly is mounted in the riveting apparatus and engaged by the clamp member. The flat bottom of the horn member engages the free ends of the rivet members, and when energized by an ultrasonic generator, causes the free ends of the rivet members to deform into the counterbores, such that the free ends are flat and in alignment with the bottom surface of the bottom member.

Ultrasonic signals are used to transmit sounds from a modulated ultrasonic generator to other locations from which the sounds appear to emanate. In particular, an ultrasonic carrier is modulated with an audio signal and demodulated on passage through the atmosphere. The carrier frequencies are substantially higher than those of prior systems, e.g., at least 60 kHz, and the modulation products thus have frequencies which are well above the audible range of humans; as a result, these signals are likely harmless to individuals who are within the ultrasonic fields of the system. The signals may be steered to moving locations, and various measures are taken to minimize distortion and maximize efficiency.