Constant Level Output Patents (Class 607/64)
  • Patent number: 9786430
    Abstract: A magnetic resonance wireless power transfer method according to an aspect of the present invention includes transmitting power from a source coil to the Tx resonant coil using a magnetic induction method, transmitting the power from the Tx resonant coil to an Rx resonant coil, having a resonant frequency identical with that of the Tx resonant coil, via magnetically-coupled resonance, and transmitting the power from the Rx resonant coil to the device coil of an electronic device using the magnetic induction method. The Tx resonant coil and the Rx resonant coil are arranged at a right angle or a specific angle of inclination relative to each other.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: October 10, 2017
    Assignee: KOREA ELECTROTECHNOLOGY RESEARCH INSTITUTE
    Inventors: Young Jin Park, Soon Wo Lee, Ji Myung Kang, Jin Wook Kim, Kwan Ho Kim
  • Patent number: 9336901
    Abstract: A system and method of providing feedback control to a pulsed RF generator includes an RF generator having an RF output and a feedback input. An RF electrode is coupled to the RF output and an RF sampling circuit having a sampling input coupled to the RF electrode. The sampling circuit including a feedback signal output coupled to the feedback input of the RF generator. A method of providing feedback control to a pulse RF generator includes receiving an RF sample of an RF pulse, sampling the RF sample multiple sampling times to produce multiple feedback levels during the duration of the RF pulse and coupling the multiple feedback levels to a feedback input on an RF generator, the RF generator outputting the RF pulse.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: May 10, 2016
    Assignee: Lam Research Corporation
    Inventor: John Drewery
  • Patent number: 9205272
    Abstract: A system for transferring data and power between electronic devices implanted in a patient is described. The system comprises a first unit and a second unit that in use are both implanted in the patient and a cable connecting the first unit and the second unit. The first unit comprises a current supply unit that supplies a selected current output to the second unit via the cable and a processor configured to anticipate an action to be performed by the second unit and to select the current output dependent on the anticipated action.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: December 8, 2015
    Assignee: NewSouth Innovations Pty Limited
    Inventors: Gregg Jorgen Suaning, Phil Byrnes-Preston, Torsten Lehmann
  • Patent number: 9186506
    Abstract: A portable pain treatment unit includes: a first pulse generator configured to deliver pulses in a frequency range typical for interferential treatment; a second pulse generator configured to deliver pulses in the frequency range for transcutaneous electrical nerve stimulator (TENS) treatment; electrodes operatively connected with the first and second pulse generators that are configured for application to a treatment area; and a power source operatively connected to the first and second pulse generators. A device of this configuration enables the patient to receive either IF or TENS treatment at a location of his/her choosing rather than being forced to receive IF treatment in a clinical setting.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: November 17, 2015
    Assignee: MEDFAXX, INC.
    Inventor: Robert G. Johnson
  • Publication number: 20150148867
    Abstract: Various implantable device embodiments may comprise a neural stimulator configured to deliver a neurostimulation therapy with stimulation ON times and stimulation OFF times where a dose of the neurostimulation therapy is provided by a number of neurostimulation pulses over a period of time. The neural stimulator may be configured to monitor the dose of the delivered neurostimulation therapy against dosing parameters. The neural stimulator may be configured to declare a fault if the monitored dose does not favorably compare to a desired dose for the neurostimulation therapy, or may be configured to record data for the monitored dose of the delivered neurostimulation therapy, or may be configured to both record data fir the monitored dose of the delivered neurostimulation therapy and declare a fault if the monitored dose does riot favorably compare to a desired dose for the neurostimulation therapy.
    Type: Application
    Filed: February 3, 2015
    Publication date: May 28, 2015
    Inventors: Doug M. Birkholz, Douglas J. Brandner, Douglas J. Gifford, David J. Ternes, William J. Linder
  • Patent number: 8965514
    Abstract: A method includes coupling electrodes to a patient's head and identifying whether any of the electrodes form a functional set, such that a desired therapeutic effect is achieved when the two or more electrodes deliver a total amount of current to the patient regardless of what portion of the total amount of current each respective electrode carries. One or more constant current sources are provided, each having a supply and return terminal, which supply and return equal amounts of current at any given time. The constant current source(s) are coupled to the electrodes in such a manner that each supply terminal and each return terminal is coupled to no more than the electrodes of a single one of the functional sets, if any, or to a single one of the electrodes not included in one of the functional sets.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: February 24, 2015
    Assignee: Research Foundation of the City University of New York
    Inventors: Marom Bikson, Abhishek Datta, Varun Bansal, Lucas C. Parra, Xiang Zhou
  • Patent number: 8957777
    Abstract: A method for establishing a connection between a first electronic computing device and a second electronic computing device includes moving the second electronic computing device so that it is proximal to the first electronic computing device. When the first electronic computing device detects the proximity of the first electronic computing device relative to the second electronic computing device, a radio on the first electronic device is set to a connectable and discoverable state. A wireless connection is automatically established between the first electronic computing device and the second electronic computing device. Data is transmitted between the first electronic computing device and the second electronic computing device.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: February 17, 2015
    Assignee: Welch Allyn, Inc.
    Inventors: Steven D. Baker, Braxton L. Lathrop
  • Patent number: 8958875
    Abstract: Implantable medical devices switch from a constant current mode of operation to a constant voltage mode of operation. The switching may be based on the device determining that tissue impedance stability has occurred. The determination may be a measurement of output voltage stability of the constant current source or based on other factors such as an amount of time that has elapsed. The switching may be as the result of an externally generated request such as by a clinician via an external device. The implantable medical device may begin constant voltage mode by utilizing stimulation parameters based on those initially programmed for constant current mode and based upon a measurement of voltage amplitude being output by the constant current source prior to the switch.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: February 17, 2015
    Assignee: Medtronic, Inc.
    Inventors: Kevin J. Kelly, Matthew J. Michaels, Gregory F. Molnar, Jonathan C. Werder
  • Patent number: 8792992
    Abstract: An apparatus comprises an electrostimulation energy storage capacitor, a circuit path communicatively coupled to the electrostimulation energy storage capacitor and configured to provide quasi-constant current neural stimulation through a load from the electrostimulation energy storage capacitor, a current measuring circuit communicatively coupled to the circuit path and configured to obtain a measure of quasi-constant current delivered to the load, and a control circuit communicatively coupled to the current measuring circuit, wherein the control circuit is configured to initiate adjustment of the voltage level of the storage capacitor for a subsequent delivery of quasi-constant current according to a comparison of the measured load current to a specified load current value.
    Type: Grant
    Filed: October 17, 2011
    Date of Patent: July 29, 2014
    Assignee: Cardiac Pacemakers, Inc.
    Inventors: William J. Linder, Keith R. Maile, Ramprasad Vijayagopal, Ron A. Balczewski
  • Patent number: 8527061
    Abstract: The disclosure relates to a load-adaptive bioelectrical current stimulator, which comprises a current output module, an adaptation module and a control module. The current output module generates a stimulus current to an electrode. The adaptation module detects the electrical status of the stimulus current passing through the electrode and generates a feedback signal to the control module. According to the feedback signal, the control module controls the current output module to stabilize the output status of the stimulus current adaptively. Thereby, the load-adaptive bioelectrical current stimulator can use the feedback control mechanism to regulate the value of the stimulus current to adapt to variation of load impedance.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: September 3, 2013
    Assignee: National Chiao Tung University
    Inventors: Ming-Dou Ker, Wei-Ling Chen, Chun-Yu Lin
  • Patent number: 8428709
    Abstract: Devices, systems and methods for controlling the application of current and/or voltage to deliver drug from patient contacts of an electrotransport drug delivery device by indirectly controlling and/or monitoring the applied current without directly measuring from the cathode of the patient terminal. In particular, described herein are electrotransport drug delivery systems including constant current delivery systems having a feedback current and/or voltage control module that is isolated from the patient contacts (e.g., anodes and cathodes). The feedback module may be isolated by a transistor from the patient contacts; feedback current and/or voltage control measurements may be performed at the transistor rather than at the patient contact (e.g., cathode).
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: April 23, 2013
    Assignees: Incline Therapeutics, Inc., Alza Corporation
    Inventors: Bradley E. White, Paul Hayter, John Lemke, Scot Satre, Corinna X. Chen, Brian W. Read, Jason E. Dougherty
  • Patent number: 8355796
    Abstract: A load detecting circuit has a primary side and a secondary side with a secondary side patient load impedance input having a patient-side opto-isolator and a secondary side reference resistance load input having a reference-side opto-isolator coupled to the secondary side patient load impedance input. The circuit also includes at least one primary side output resistor, wherein the patient-side opto-isolator and the reference-side opto-isolator drive the at least one primary side output resistor and an integrator for operatively controlling the secondary side and conveying the patient load input and the reference load input to the primary side, where the patient load input and the reference load input are powered by a secondary side transformer winding.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: January 15, 2013
    Assignee: International Rehabilitative Sciences, Inc.
    Inventors: James F. Bausch, George Vernon, Aleksandr Gridasov
  • Patent number: 8155740
    Abstract: A constant current pacing apparatus and method for pacing uses, for example, H-bridge circuitry and a constant current source connected to the H-bridge circuitry.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: April 10, 2012
    Assignee: Medtronic, Inc.
    Inventor: Kevin A. Wanasek
  • Patent number: 7930036
    Abstract: Therapy and treatment devices, systems and methods for providing tactile and electrical stimulation to augment mammary glands and for making the tissues healthy and anti-carcinogenous. The devices, systems and methods combine both massage (tactile) stimulation with electrical current stimulation by electrodes to both augment mammary glands and for making the tissues healthy and anti-carcinogenous.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: April 19, 2011
    Inventor: Pravin Joshi
  • Patent number: 7729777
    Abstract: A voltage compensation unit reduces the effects of induced voltages upon a device having a single wire line. The single wire line has balanced characteristic impedance. The voltage compensation unit includes a tunable compensation circuit connected to the wire line. The tunable compensation circuit applies supplemental impedance to the wire line. The supplemental impedance causes the characteristic impedance of the wire line to become unbalanced, thereby reducing the effects of induced voltages caused by changing magnetic fields.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: June 1, 2010
    Assignee: Medtronic, Inc.
    Inventors: Robert W. Gray, Stuart G. MacDonald
  • Patent number: 7720548
    Abstract: Techniques for adjusting stimulation are disclosed. A medical device measures an impedance associated with one or more electrodes, e.g., the impedance presented to the medical device by a total electrical circuit that includes the one or more electrodes, the conductors associated with the electrodes, and tissue proximate to the electrodes. The medical device stores at least one patient-specific relationship between impedance and a stimulation parameter, and adjusts the value of the stimulation parameter based on the measured impedance according to the relationship. The medical device may store multiple relationships, and select one the relationships based on, for example, an activity level of the patient, posture of the patient, or a current stimulation program or electrode combination used to deliver stimulation. By adjusting a stimulation parameter, such as amplitude, according to such a relationship, the stimulation intensity as perceived by the patient may be kept substantially constant.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: May 18, 2010
    Assignee: Medtronic
    Inventor: Gary W. King
  • Patent number: 7647121
    Abstract: Techniques for selectably providing either constant voltage or constant current stimulation are described. A programming device provides a user interface by which a user selects either constant voltage or constant current stimulation, and selects either a voltage or current amplitude based on the selected stimulation mode. The programming device configures a medical device to provide the selected mode of stimulation at the selected amplitude. For example, when a medical device has constant voltage stimulation circuitry, e.g., circuitry including a voltage source, and the user selects constant current stimulation, the programming device configures the medical device to adjust the voltage amplitude based on a measured impedance to provide substantially constant current amplitude.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: January 12, 2010
    Assignee: Medtronic, Inc.
    Inventors: Carl D. Wahlstrand, Robert M. Skime
  • Patent number: 7519429
    Abstract: The present invention relates to lower urinary dysfunctions and more particularly to an electronic stimulator implant and method to improve bladder voiding and prevent bladder hyperreflexia. There is provided an electronic stimulator implant for which comprises a tonicity signal generator generating a tonicity signal which prevents bladder hyperreflexia combined with a voiding signal generator generating a voiding signal for voiding the bladder. The implant is connected to an end of an electrode, and the second end thereof is connected to a sacral nerve. When the voiding key (or switch) is activated, the voiding signal is generated which activates detrusor muscle contraction, causing bladder voiding. The voiding may be achieved without dyssynergia, by activating detrusor muscle contraction without activating external urethral sphincter contraction. The tonicity signal may be provided intermittently. The implant may be activated by a manually activated external controller.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: April 14, 2009
    Inventors: Mohammad Sawan, Mostafa Elhilali
  • Patent number: 7463931
    Abstract: Electrobiological stimulation is carried out transcranially by applying high frequency squarewave bursts exhibiting no d.c. term across the cranial region. Such stimulation is commenced employing ramp generators and positive and negative voltage converters which evolve the requisite baseform and burst frequencies having a voltage waveform which is square in nature. Both voltage and current are sensed and subjected to comparator logic in conjunction with predetermined thresholds and windows. Overcurrent detection and overvoltage detection is provided in hard wired fashion to assure rapid shutdown response. D.C offset detection is provided along with waveform balance tests to further assure the safety of the system. Diagnostic procedures as well as therapeutic procedures may be carried out with a system version which provides for the application of a stimulus in conjunction with safety monitoring and controller based development of stimulating waveforms, all of which exhibits no d.c. term.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: December 9, 2008
    Inventors: George B. Foster, Thomas L. Fletcher
  • Patent number: 7389147
    Abstract: Techniques for selectably providing either constant voltage or constant current stimulation are described. A programming device provides a user interface by which a user selects either constant voltage or constant current stimulation, and selects either a voltage or current amplitude based on the selected stimulation mode. The programming device configures a medical device to provide the selected mode of stimulation at the selected amplitude. For example, when a medical device has constant voltage stimulation circuitry, e.g., circuitry including a voltage source, and the user selects constant current stimulation, the programming device configures the medical device to adjust the voltage amplitude based on a measured impedance to provide substantially constant current amplitude.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: June 17, 2008
    Assignee: Medtronic, Inc.
    Inventors: Carl D. Wahlstrand, Robert M. Skime
  • Patent number: 6026329
    Abstract: The disclosure is a skin care machine having a constant current generating function and giving a skin bounce thereof and soft by applying a micro constant current to the skin, and including a memory storing a guide picture including a process applying the constant current to the skin of respective body parts with an electric conductive material as a body part and a picture thereof; a graphic display unit displaying a guide picture including a process applying the constant current to the skin of respective body parts with the electric conductive material as the body part and the picture thereof stored in the memory; and a controlling unit transmitting a guide picture including a process applying the constant current to the skin of respective body parts with the electric conductive material as the body part and the picture thereof stored in the memory to the graphic display unit, as a given process.
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: February 15, 2000
    Assignee: Sein Electronics Co., Ltd.
    Inventors: Tae Young Che, Si Chel Lee, Jae Woo Han, Jong In Jeung, Jae Aog An