Patents by Inventor Dale Nelson

Dale Nelson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20060238226
    Abstract: A baseband clock synthesizer having particular use in a BLUETOOTH piconet device, having the capability of generating either 12 MHz or 13 MHz clock signals generated from any reference clock signal, e.g., 12.00, 12.80, 13.00, 15.36, 16.80, 19.20, 19.44, 19.68, 19.80, and 26.00 MHz. A fractional-N frequency divider is implemented with a PLL including a variable divider allowing the use of virtually any reference frequency input to generate a locked 156 MHz clock signal used as a basis for a 12 MHz or 13 MHz baseband clock signal. A residue feedback sigma-delta modulator provides a varying integer sequence to an integer divider in a feedback path of the PLL, effectively allowing division by non-integer numbers in the PLL. Thus, the PLL can be referenced to virtually any reference clock and still provide a fixed output clock signal (e.g., 12 or 13 MHz).
    Type: Application
    Filed: April 20, 2005
    Publication date: October 26, 2006
    Inventors: William Holland, Wenzhe Luo, Zhigang Ma, Dale Nelson, Harold Simmonds, Lizhong Sun, Xiangqun Sun
  • Publication number: 20060215798
    Abstract: A signal generator circuit having enhanced control resolution includes a variable frequency oscillator having a first control input adapted to receive a first signal and at least a second control input adapted to receive a second signal. The second signal is afforded a weight which is substantially equal to a weight of a least significant bit of the first signal. The variable frequency oscillator is operative to generate an output signal having a frequency which varies as a function of the first and second signals. The signal generator circuit further includes a first counter, a first divider and a modulation circuit. The first counter is configurable for generating an output count based at least in part on a difference between a third signal presented to the signal generator circuit and a fourth signal indicative of the output signal, the output count including the first signal.
    Type: Application
    Filed: May 24, 2006
    Publication date: September 28, 2006
    Inventor: Dale Nelson
  • Publication number: 20060142956
    Abstract: A system and method for determining the classification of a signal, or the identification of an object is provided. Based on rough set theory, or data mining, a training data set is partitioned and labeled with a multi-class entropy method. Reducts are calculated from a subset of the best-performing columns of the partitioned and labeled training set data. These reducts are applied to test signals and combined for each signal classification. The present system and method produces a more accurate, robust and efficient classification result.
    Type: Application
    Filed: February 24, 2006
    Publication date: June 29, 2006
    Inventors: Janusz Starzyk, Dale Nelson
  • Publication number: 20060025763
    Abstract: The ablation catheter is comprised of a guiding catheter and an inner catheter. The guiding catheter is comprised of a shaft section which is attached to an articulating section at its distal end and a first handle at its proximal end. The inner catheter is comprised of an elongated central shaft, an electrode assembly attached to the distal end of the central shaft, and a second handle attached to the proximal end of the central shaft. The electrode assembly is comprised of a flexible plastic catheter tube having an outer surface, a porous tip electrode, and at least one linear electrode carried on the outer surface of the catheter tube. The electrode assembly is articulated to better align the electrode assembly to the generally arcuate shape of the inner chambers of the heart.
    Type: Application
    Filed: September 26, 2005
    Publication date: February 2, 2006
    Inventors: Dale Nelson, Steven Savage, William Penny, Jeffrey Santer
  • Patent number: 6986769
    Abstract: The ablation catheter is comprised of a guiding catheter and an inner catheter. The guiding catheter is comprised of a shaft section which is attached to an articulating section at its distal end and a first handle at its proximal end. The inner catheter is comprised of an elongated central shaft, an electrode assembly attached to the distal end of the central shaft, and a second handle attached to the proximal end of the central shaft. The electrode assembly is comprised of a flexible plastic catheter tube having an outer surface, a porous tip electrode, and at least one linear electrode carried on the outer surface of the catheter tube. The electrode assembly is articulated to better align the electrode assembly to the generally arcuate shape of the inner chambers of the heart.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: January 17, 2006
    Assignee: Biosense Webster, Inc.
    Inventors: Dale Nelson, Steven D. Savage, William Penny, Jeffrey Santer
  • Publication number: 20050265505
    Abstract: A phase-locked loop includes a variable frequency generator, a comparator and a counter. The variable frequency generator is configurable for generating an output signal having a frequency which varies based at least in part on at least first and second control signals presented thereto. The comparator is configurable for receiving a first signal and a second signal, the first signal being an input signal presented to the phase-locked loop and the second signal being representative of the output signal from the variable frequency generator. The comparator generates a difference signal representative of a difference between a phase and/or a frequency of the first and second signals, the difference signal comprising the first control signal. The counter is configurable for generating an output count based at least in part on the difference signal from the comparator. The output count is a digital representation of the difference signal, the output count comprising the second control signal.
    Type: Application
    Filed: May 28, 2004
    Publication date: December 1, 2005
    Inventors: Dale Nelson, Parag Parikh
  • Patent number: 6966893
    Abstract: An over pressurization relief apparatus having a manual over pressurization selector which allows a user to manually select from at least a first and second over pressurization limit. The over pressurization relief apparatus includes a pressurization chamber, a pressure relief mechanism, a seal, and a manual over pressurization selector. The pressurization of the pressurization chamber corresponds with the pressurization of the pressure infusion bag. The pressure relief mechanism prevents additional pressurization of the pressure infusion bag once the over pressurization limit has been reached. The seal is positioned between the pressurization chamber and the pressure relief mechanism to prevent the loss of pressurization from the pressure infusion bag when the pressurization in the pressurization chamber is less than the over pressurization limit.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: November 22, 2005
    Assignee: Merit Medical Systems, Inc.
    Inventors: Troy Holtby, Greg McArthur, Tom Stout, Arlin Dale Nelson
  • Publication number: 20050010247
    Abstract: A distal protection device for use in a body lumen. The device includes a functional element which may be a filter or an occlusive element. The device includes means for controlling the movement and placement of the functional element along a guidewire. Motion of the guidewire can be independent of the motion of the functional element.
    Type: Application
    Filed: August 10, 2004
    Publication date: January 13, 2005
    Inventors: Richard Kusleika, Daniel Adams, Kent Anderson, Dale Nelson, Jeffrey Santer
  • Patent number: 6773448
    Abstract: A distal protection device for use in a body lumen. The device includes a functional element which may be a filter or an occlusive element. The device includes means for controlling the movement and placement of the functional element along a guidewire. Motion of the guidewire can be independent of the motion of the functional element.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: August 10, 2004
    Assignee: ev3 Inc.
    Inventors: Richard S. Kusleika, Daniel Adams, Kent D. Anderson, Dale Nelson, Jeffrey D. Santer
  • Publication number: 20040054369
    Abstract: The ablation catheter is comprised of a guiding catheter and an inner catheter. The guiding catheter is comprised of a shaft section which is attached to an articulating section at its distal end and a first handle at its proximal end. The inner catheter is comprised of an elongated central shaft, an electrode assembly attached to the distal end of the central shaft, and a second handle attached to the proximal end of the central shaft. The electrode assembly is comprised of a flexible plastic catheter tube having an outer surface, a porous tip electrode, and at least one linear electrode carried on the outer surface of the catheter tube. The electrode assembly is articulated to better align the electrode assembly to the generally arcuate shape of the inner chambers of the heart.
    Type: Application
    Filed: September 8, 2003
    Publication date: March 18, 2004
    Inventors: Dale Nelson, Steven D. Savage, William Penny, Jeffrey Santer
  • Patent number: 6669692
    Abstract: The ablation catheter is comprised of a guiding catheter and an inner catheter. The guiding catheter is comprised of a shaft section which is attached to an articulating section at its distal end and a first handle at its proximal end. The inner catheter is comprised of an elongated central shaft, an electrode assembly attached to the distal end of the central shaft, and a second handle attached to the proximal end of the central shaft. The electrode assembly is comprised of a flexible plastic catheter tube having an outer surface, a porous tip electrode, and at least one linear electrode carried on the outer surface of the catheter tube. The electrode assembly is articulated to better align the electrode assembly to the generally arcuate shape of the inner chambers of the heart.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: December 30, 2003
    Assignee: Biosense Webster, Inc.
    Inventors: Dale Nelson, Steven D. Savage, William Penny, Jeffrey Santer
  • Publication number: 20030171770
    Abstract: A distal protection device for use in a body lumen. The device includes a functional element which may be a filter or an occlusive element. The device includes means for controlling the movement and placement of the functional element along a guidewire. Motion of the guidewire can be independent of the motion of the functional element.
    Type: Application
    Filed: March 8, 2002
    Publication date: September 11, 2003
    Inventors: Richard S. Kusleika, Daniel O. Adams, Kent D. Anderson, Dale Nelson, Jeffrey D. Santer
  • Patent number: 6508789
    Abstract: Systems and methods for coupling a catheter, such as a drainage catheter, to a patient's body and decoupling the catheter from the body are disclosed. Embodiments of the present invention take advantage of the flexibility of a catheter cannula and allow for a self-contained system that secures the catheter cannula within the body while bodily fluid is draining. In one embodiment, the catheter is coupled to the body by compressing a proximal hub member to a distal hub member, causing the cannula to curl and form an anchoring configuration (i.e. a loop, pigtail, j-curve, malecot, etc.). In compressing the portions, one or more fingers within the proximal hub member force a cord into one or more corresponding channels within the distal hub member, thereby shortening the amount of cord in the cannula. The proximal and distal hub members can be locked together in the compressed position for as long as the catheter is to be coupled to the body.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: January 21, 2003
    Assignee: Merit Medical Systems, Inc.
    Inventors: Margaret Mary Sinnott, Arlin Dale Nelson, John Heber Whiting, Jr.
  • Patent number: 6396357
    Abstract: A ring oscillator including a voltage-to-current converter for producing at least one control current from at least one control voltage and, a plurality of delay cells coupled to the converter, wherein at least one output of the one of the delay cells is coupled to the input of another of the delay cells, wherein the voltage-to-current converter produces a substantially linear output when the at least one control voltage is varied between zero volts and a rail supply voltage. Since the ring oscillator operates from a low voltage source, it can be used in applications where power supply (e.g., battery size) is small (e.g., pagers, cellular phone applications).
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: May 28, 2002
    Assignee: Agere Systems Guardian Corp.
    Inventors: Lizhong Sun, Dale Nelson
  • Publication number: 20020057135
    Abstract: A ring oscillator including a voltage-to-current converter for producing at least one control current from at least one control voltage and, a plurality of delay cells coupled to the converter, wherein at least one output of the one of the delay cells is coupled to the input of another of the delay cells, wherein the voltage-to-current converter produces a substantially linear output when the at least one control voltage is varied between zero volts and a rail supply voltage. Since the ring oscillator operates from a low voltage source, it can be used in applications where power supply (e.g., battery size) is small (e.g., pagers, cellular phone applications).
    Type: Application
    Filed: May 1, 2000
    Publication date: May 16, 2002
    Inventors: Lizhong Sun, Dale Nelson
  • Patent number: 6244865
    Abstract: A tongue positioning device is disclosed for positioning the tongue within a user's mouth. The device includes a tongue positioning mouthpiece that includes a mouthpiece body with a center hole therein. A flange portion extends around the periphery of the mouthpiece body that forms an acoustic seal with the teeth and lips of a patient during use. A pair of bite blocks protrude from the mouthpiece body on opposing lateral sides of the center hole. A tongue bridge is fixedly secured to the bite blocks via a pair of downwardly extending arms. The tongue bridge includes a platform area where a patient's tongue is placed under when the mouthpiece is used. A cylindrical portion extends from the mouthpiece body in a direction away from the flange. An optional filter is removable from the cylindrical portion and acts as a protective barrier for viruses, bacteria, microbes, and other pathogens. The filter includes a removable filter body containing a filter media.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: June 12, 2001
    Assignee: Sensormedics Corporation
    Inventors: Dale Nelson, Michael J. Salemi
  • Patent number: 6139523
    Abstract: Systems and methods for isolating a pressure gauge from sources of potential contamination so that the pressure gauge may be reused in multiple medical procedures without having to be subjected to a sterilization procedure. The systems of the invention may include a syringe assembly having a pressure gauge removably attached to a syringe. The pressure gauge is isolated from sources of potential contamination in at least two ways. First, a flexible membrane separates a pressure transducer diaphragm of the pressure gauge from the pressurized fluid of the syringe. The flexible membrane prevents the pressure gauge from contacting the fluid and transmits pressure and forces from the fluid to the pressure gauge. Second, a substantially transparent disposable bag or film covers surfaces of the pressure gauge that would be otherwise exposed to human contact or other contaminants. During medical procedures, the pressure gauge maintains its sterile condition.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: October 31, 2000
    Assignee: Merit Medical Systems, Inc.
    Inventors: Steven R. Taylor, Arlin Dale Nelson
  • Patent number: 6093182
    Abstract: An adaptor for coupling a fluid source to a wound irrigation shield is disclosed. The preferred adaptor, preferably a multi-part adaptor, features spray pattern adjustability, removable coupling to the shield, the capacity for removably coupling to a variety of different fluid sources, and a variety of other features and advantages. In one embodiment, the adaptor has a substantially planar face that is substantially coplanar with the plane defined by the shield, thereby preventing patient puncture.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: July 25, 2000
    Assignee: Merit Medical Systems, Inc.
    Inventors: Fred P. Lampropoulos, Arlin Dale Nelson, Gregory R. McArthur, Jerrold L. Foote
  • Patent number: 6050981
    Abstract: The present invention relates to a system for irrigating a wound with wound irrigation fluid and for preventing substantial splashback of the wound irrigation fluid. The system comprises: (i) fluid delivery device for delivering wound irrigation fluid; and (ii) a flexible wound irrigation shield configured such that the shield prevents substantial splashback of the irrigation fluid upon irrigation of a wound. The shield is configured to be disposed, preferably removably, on the fluid delivery device. The flexible shield is substantially conformable to a desired wound area, enabling the practitioner to irrigate awkward, uneven, and hard to reach areas. The shield can be folded into a compact position, then opened into a larger shield. The fluid delivery device comprises (i) a fluid source for providing wound irrigation fluid; and (ii) an adaptor for transmitting fluid from the fluid source to the wound.
    Type: Grant
    Filed: May 11, 1998
    Date of Patent: April 18, 2000
    Assignee: Merit Medical Systems, Inc.
    Inventors: Fred P. Lampropoulos, Brent E. Mabey, Arlin Dale Nelson, Gregory R. McArthur, Jerrold L. Foote
  • Patent number: 5984895
    Abstract: A blood containment device for use with a vascular entry needle provides visual and tactile confirmation that a blood vessel has been properly entered. The device includes a blood visualization chamber defined by a compliant member which provides a visual indication that a needle connected to the device has accessed a selected blood vessel. The blood visualization chamber is vented to allow air to escape therefrom as it is displaced by blood entering the visualization chamber, while a gas permeable membrane in communication with the vent to prevent significant blood from escaping from the blood containment device. A sealing member formed on an outer surface at one end of the compliant member works in conjunction with the gas permeable membrane to prevent significant leakage of blood from the device. The compliant member pulsates with changes in blood pressure, thereby providing continuous tactile confirmation that the needle tip is properly positioned within the selected blood vessel.
    Type: Grant
    Filed: January 15, 1998
    Date of Patent: November 16, 1999
    Assignee: Merit Medical Systems, Inc.
    Inventors: William Padilla, Arlin Dale Nelson