PatentDOI
Ultrasonic generating system with feedback control
TLDR
In this article, an ultrasonic generating system for coupling vibrating energy into a load, such as living tissue, has been described which employs a piezoelectric crystal having excitation electrodes on opposite faces thereof.Abstract:
An ultrasonic generating system for coupling vibrating energy into a load, such as living tissue, has been described which employs a piezoelectric crystal having excitation electrodes on opposite faces thereof A feedback electrode is disposed on one face of the crystal adjacent to and insulated from one of the excitation electrodes to provide a feedback signal between the feedback electrode and the other excitation electrode A power supply is provided for applying excitation energy to the excitation electrodes The feedback signal is utilized to slave the frequency of the power supply voltage to the resonant frequency of the crystal and to disable the power supply when the impedance of the load applied to the crystal rises above a predetermined levelread more
Citations
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Patent
Surgical generator for ultrasonic and electrosurgical devices
TL;DR: A control circuit of a surgical device is described in this paper, which includes a first circuit portion coupled to at least one switch operable between an open state and a closed state.
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Ultrasonic surgical instruments
TL;DR: In this paper, a transducer and an end effector are configured to provide vibrations along a longitudinal axis at a predetermined frequency and may comprise a piezoelectric stack positioned along the longitudinal axis.
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Surgical instrument with jaw member
TL;DR: A surgical instrument for supplying energy to tissue may comprise a handle, a trigger, an electrical input, and a shaft extending from the handle as discussed by the authors, and the end effector may comprise an electrode comprising a tapered tissue contacting surface.
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Ultrasonic device for cutting and coagulating with stepped output
James R. Giordano,Robert J. Beetel,Eitan T. Wiener,Jeffrey D. Messerly,Brian F Dinardo,Daniel J. Abbott +5 more
TL;DR: In this article, a generator coupled to an ultrasonic transducer is used to generate a first ultrasonic drive signal for a first period, followed by a second drive signal subsequent to the first period.
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Surgical instruments with articulating shafts
TL;DR: In this article, a proximally positioned straight section extending along a longitudinal axis and a distally positioned curved section coupled to the straight section and curved away from the longitudinal axis are described.
References
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Patent
Ultrasonic kits and motor systems
TL;DR: In this paper, various embodiments of an ultrasonic kit adapted to be used in the home or for industrial purposes, as well as a variety of ultrasonic motor constructions and ultrasonic converter designs are described.
Patent
Ultrasonic dental and other instrument means and methods
TL;DR: In this article, the authors describe various ultrasonic dental equipment primarily adapted to be used for professional dental purposes as well as various dental procedures capable of being performed with the ultrasonic instrumentation.
PatentDOI
Ultrasound therapy device.
TL;DR: In this article, an ultrasound therapy device is provided which maintains a selected constant electrical drive power to a transducer regardless of the load on said transducers by means of an analog servo feedback circuit.
Patent
Method and apparatus for ultrasonic treatment of lower tissues simultaneous with heating of subcutaneous, outer muscle and lower tissues
TL;DR: An ultrasonic frequency electro-mechanical therapeutic method and apparatus for treating an afflicted member, having skin, subcutaneous outer muscle and lower tissues, of a patient's body, the lower tissues including muscle, nerve, bone or joint tissues as discussed by the authors.
Patent
Automatic dose meter and control circuit arrangement
Hartl Janos,Hancz Laszlo +1 more
TL;DR: An automatic dose meter and control circuit arrangement of switching and analog modes of operation, especially for ultrasonic therapeutic apparatus, was proposed in this paper, where a signal proportional to the dose get by the patient is generated and processed, and the operation of an ultrasonic generator feeding the treatment head is controlled with this signal.