Patents by Inventor Daniel Cheek

Daniel Cheek 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: 20220009762
    Abstract: A fluid exchanger may exchange a fluid (e.g., coolant) in a reservoir (e.g., vehicle radiator) by removing or withdrawing a first fluid (e.g., old, spent, used, etc.) and by introducing a second fluid (e.g., new, clean, etc.). For example, the fluid exchanger may use a negative pressure, suction, or vacuum to draw the first fluid from the reservoir, and subsequently, the second fluid may be transferred into the reservoir using a negative pressure held in the reservoir, a positive pressure applied to the second fluid, or a combination thereof. The fluid exchanger may also include a multi-purpose, hand-held nozzle that can change an operation of the fluid exchanger from a withdrawing mode to a dispensing mode.
    Type: Application
    Filed: June 29, 2021
    Publication date: January 13, 2022
    Inventors: Michael J. Erwin, Bradley Robert Young, Lucas Mitchell Shaw, Thomas Michael Probus, John Daniel Cheek
  • Publication number: 20210204999
    Abstract: Instrument and systems for applying ablative energy to epicardial tissue via a subxiphoid access surgical approach. The instrument has a head assembly sized and shaped for a subxiphoid surgical approach to a patient's heart and defines a contact face. The head assembly includes a paddle body, a first ablation electrode, and a second ablation electrode. The ablation electrodes are coupled to the paddle body in a spaced apart, spatially-fixed fashion. The ablation electrodes are exteriorly exposed at the contact face. A tubular member extends from the head assembly and maintains wiring connected to the ablation electrodes. The instrument is manipulable to locate the contact face on epicardial tissue of a patient's heart via a subxiphoid surgical approach, such as between the left and right pulmonary vein junctions of the posterior left atrium.
    Type: Application
    Filed: March 18, 2021
    Publication date: July 8, 2021
    Applicant: Medtronic, Inc.
    Inventors: James Skarda, Steven F. Bolling, Daniel Cheek, Brian Ross, Mitchell Strain, Steve Ramberg, Thomas J. Conway, Randy M. Thill
  • Patent number: 10973566
    Abstract: Instrument and systems for applying ablative energy to epicardial tissue via a subxiphoid access surgical approach. The instrument has a head assembly sized and shaped for a subxiphoid surgical approach to a patient's heart and defines a contact face. The head assembly includes a paddle body, a first ablation electrode, and a second ablation electrode. The ablation electrodes are coupled to the paddle body in a spaced apart, spatially-fixed fashion. The ablation electrodes are exteriorly exposed at the contact face. A tubular member extends from the head assembly and maintains wiring connected to the ablation electrodes. The instrument is manipulable to locate the contact face on epicardial tissue of a patient's heart via a subxiphoid surgical approach, such as between the left and right pulmonary vein junctions of the posterior left atrium.
    Type: Grant
    Filed: October 18, 2017
    Date of Patent: April 13, 2021
    Assignee: Medtronic, Inc.
    Inventors: James Skarda, Steven Bolling, Daniel Cheek, Brian Ross, Mitchell Strain, Steve Ramberg, Thomas J Conway, Randy Thill
  • Publication number: 20200324650
    Abstract: Revving an engine may be helpful in various contexts, such as when servicing the vehicle. For example, in some types of services, a cleaning agent may be introduced into the intake and surrounding regions of an engine, and the engine may be revved to reduce a likelihood that the cleaning agent might puddle. In some instances, a device can be positioned within a vehicle interior and can be used to automatically rev the vehicle engine by depressing on the vehicle throttle. In other examples, an engine revving device may send a signal to an electronic-controlled throttle actuator.
    Type: Application
    Filed: April 10, 2020
    Publication date: October 15, 2020
    Inventors: Michael Jason Erwin, Thomas Michael Probus, John Daniel Cheek, Lucas Mitchell Shaw, Bradley Robert Young
  • Patent number: 10371694
    Abstract: Activated clotting time (ACT) tests detect blood clotting time based on the viscosity changes of a test sample, using a ferromagnetic washer lifted to the top of a test chamber and then dropped from the top via gravity; a drop time greater than a preset threshold value indicates clotting of the test sample. Blood samples which have high levels of heparin usually produce very weak clots that may easily be destroyed by the lifting movement of the washer. But if the clot threshold is set low to detect the weak clots, false detections occur during early testing cycles when activators are not fully suspended during the mixing cycle. Improved algorithms for lifting the washer and adjusting over time enable accurate detection of weak clots.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: August 6, 2019
    Assignee: MEDTRONIC, INC.
    Inventors: Daniel Cheek, Lawrence Erickson, Trevor Huang, Tessy Kanayinkal, Craig Petersen, Charlene Yuan
  • Publication number: 20180049796
    Abstract: Instrument and systems for applying ablative energy to epicardial tissue via a subxiphoid access surgical approach. The instrument has a head assembly sized and shaped for a subxiphoid surgical approach to a patient's heart and defines a contact face. The head assembly includes a paddle body, a first ablation electrode, and a second ablation electrode. The ablation electrodes are coupled to the paddle body in a spaced apart, spatially-fixed fashion. The ablation electrodes are exteriorly exposed at the contact face. A tubular member extends from the head assembly and maintains wiring connected to the ablation electrodes. The instrument is manipulable to locate the contact face on epicardial tissue of a patient's heart via a subxiphoid surgical approach, such as between the left and right pulmonary vein junctions of the posterior left atrium.
    Type: Application
    Filed: October 18, 2017
    Publication date: February 22, 2018
    Inventors: James Skarda, Steven Bolling, Daniel Cheek, Brian Ross, Mitchell Strain, Steve Ramberg, Thomas J. Conway, Randy Thill
  • Patent number: 9820803
    Abstract: Instrument and systems for applying ablative energy to epicardial tissue via a subxiphoid access surgical approach. The instrument has a head assembly sized and shaped for a subxiphoid surgical approach to a patient's heart and defines a contact face. The head assembly includes a paddle body, a first ablation electrode, and a second ablation electrode. The ablation electrodes are coupled to the paddle body in a spaced apart, spatially-fixed fashion. The ablation electrodes are exteriorly exposed at the contact face. A tubular member extends from the head assembly and maintains wiring connected to the ablation electrodes. The instrument is manipulable to locate the contact face on epicardial tissue of a patient's heart via a subxiphoid surgical approach, such as between the left and right pulmonary vein junctions of the posterior left atrium.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: November 21, 2017
    Assignee: Medtronic, Inc.
    Inventors: James Skarda, Steven Bolling, Daniel Cheek, Brian Ross, Mitchell Strain, Steve Ramberg, Tom Conway, Randy Thill
  • Patent number: 9429563
    Abstract: Activated clotting time (ACT) tests detect blood clotting time based on the viscosity changes of a test sample, using a ferromagnetic washer lifted to the top of a test chamber and then dropped from the top via gravity; a drop time greater than a preset threshold value indicates clotting of the test sample. Blood samples which have high levels of heparin usually produce very weak clots that may easily be destroyed by the lifting movement of the washer. But if the clot threshold is set low to detect the weak clots, false detections occur during early testing cycles when activators are not fully suspended during the mixing cycle. Improved algorithms for lifting the washer and adjusting over time enable accurate detection of weak clots.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: August 30, 2016
    Assignee: Medtronic, Inc.
    Inventors: Daniel Cheek, Lawrence Erickson, Trevor Huang, Tessy Kanayinkal, Craig Petersen, Charlene Yuan
  • Publication number: 20160238621
    Abstract: Activated clotting time (ACT) tests detect blood clotting time based on the viscosity changes of a test sample, using a ferromagnetic washer lifted to the top of a test chamber and then dropped from the top via gravity; a drop time greater than a preset threshold value indicates clotting of the test sample. Blood samples which have high levels of heparin usually produce very weak clots that may easily be destroyed by the lifting movement of the washer. But if the clot threshold is set low to detect the weak clots, false detections occur during early testing cycles when activators are not fully suspended during the mixing cycle. Improved algorithms for lifting the washer and adjusting over time enable accurate detection of weak clots.
    Type: Application
    Filed: April 21, 2016
    Publication date: August 18, 2016
    Inventors: Daniel Cheek, Lawrence Erickson, Trevor Huang, Tessy Kanayinkal, Craig Petersen, Charlene Yuan
  • Patent number: 8221411
    Abstract: Cardiac electroporation ablation systems and methods in which pulsed, high voltage energy is delivered to induce electroporation of cells of cardiac tissue followed by cell rupturing. In some embodiments, the delivered energy is biphasic, having a cycle time of not more than 500 microseconds.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: July 17, 2012
    Assignee: Medtronic, Inc.
    Inventors: David Francischelli, Mark Stewart, Jinback Hong, Vladimir Nikolski, Cushing Hamlen, Daniel Cheek, Matthew Bonner
  • Publication number: 20110270243
    Abstract: Instrument and systems for applying ablative energy to epicardial tissue via a subxiphoid access surgical approach. The instrument has a head assembly sized and shaped for a subxiphoid surgical approach to a patient's heart and defines a contact face. The head assembly includes a paddle body, a first ablation electrode, and a second ablation electrode. The ablation electrodes are coupled to the paddle body in a spaced apart, spatially-fixed fashion. The ablation electrodes are exteriorly exposed at the contact face. A tubular member extends from the head assembly and maintains wiring connected to the ablation electrodes. The instrument is manipulable to locate the contact face on epicardial tissue of a patient's heart via a subxiphoid surgical approach, such as between the left and right pulmonary vein junctions of the posterior left atrium.
    Type: Application
    Filed: April 28, 2010
    Publication date: November 3, 2011
    Applicant: Medtronic, Inc.
    Inventors: James Skarda, Steven Bolling, Daniel Cheek, Brian Ross, Mitchell Strain, Steve Ramberg, Tom Conway, Randy Thill
  • Publication number: 20100023004
    Abstract: Cardiac electroporation ablation systems and methods in which pulsed, high voltage energy is delivered to induce electroporation of cells of cardiac tissue followed by cell rupturing. In some embodiments, the delivered energy is biphasic, having a cycle time of not more than 500 microseconds.
    Type: Application
    Filed: December 9, 2008
    Publication date: January 28, 2010
    Inventors: David Francischelli, Mark Stewart, Jinback Hong, Vladimir Nikolski, Cushing Hamlen, Daniel Cheek, Matthew Bonner
  • Publication number: 20080275439
    Abstract: A system for ablating tissue and electrically interfacing with a heart including an electrosurgical instrument, an energy source, and a controller. The instrument includes a shaft maintaining first and second electrodes at a distal section. The electrodes are electrically isolated from one another. The controller controls delivery of energy from the energy source, and monitors electrical signals at the electrodes. The controller is programmed to operate in a monopolar mode and a bipolar mode. In the monopolar mode, the first and second electrodes are electrically uncoupled, and energy from the energy source is delivered to the first electrode in performing an ablation procedure. In the bipolar mode, first and second electrodes are electrically coupled and serve as opposite polarity poles to apply energy to a tissue target site, detect electrical signals at a tissue target site, or both.
    Type: Application
    Filed: March 26, 2008
    Publication date: November 6, 2008
    Inventors: David Francischelli, Mark Stewart, Daniel Cheek, Brian Ross, Paul Rothstein, Scott Klein, Asif Hameed, Doug Crowe, Kester Batchelor, William Colon
  • Publication number: 20080206880
    Abstract: A system and method for determining a coagulation time, e.g., TT, PT, aPTT, and ACT, of a test sample deposited in a test cartridge is disclosed. A cartridge housing having upper and lower major sides and a minor sidewall encloses a test chamber having a test chamber pivot element and is provided with a cartridge port for introducing a test sample into the test chamber,. Ferromagnetic agitator vane leaflets extend from an agitator pivot element supported by the test chamber pivot element intermediate the upper and lower major sides for rotational motion. The agitator vane leaflets can be swept, in response to an external magnetic field, through the test sample in the absence of coagulation. A timer is started when the agitator movement is commenced whereupon the agitator moves freely. Resistance to agitator movement due to coagulation is detected, and the coagulation time is measured.
    Type: Application
    Filed: April 19, 2004
    Publication date: August 28, 2008
    Inventors: Cynthia Clague, Daniel Cheek, Douglas Nippoldt
  • Publication number: 20070077611
    Abstract: An article and methods for testing a coagulation process in whole blood.
    Type: Application
    Filed: September 13, 2006
    Publication date: April 5, 2007
    Inventors: Jyotsna Ghai, Charlene Yuan, Wei Qin, Mark Thompson, Daniel Cheek
  • Publication number: 20060016701
    Abstract: Methods and devices for point of care determination of heparin concentration in blood are described. Cartridges including protamine ion sensitive electrodes (ISEs) and reference electrodes and systems for automatically determining heparin concentration in the cartridges are provided. Some systems add blood to a protamine bolus sufficient to bind all heparin, leaving excess protamine. The excess protamine concentration can be determined by measuring the initial slope of the electrode potential rate of change, and comparing the slope to known protamine concentration slope values In some cartridges, an oscillating pressure source moves the blood-protamine mixture back and forth across the protamine ISE. Some systems also use a second blood sample having the heparin removed or degraded to create a blank reference sample. Protamine ISEs can include polyurethane polymer, DNNS ionophore, and NPOE plasticizer.
    Type: Application
    Filed: May 11, 2005
    Publication date: January 26, 2006
    Inventors: Wei Qin, Daniel Cheek, Christopher Hobot, Kelvin Bonnema, Randy Meyer, Douglas Nippoldt, Vitally Sitko, Qingshan (Sam) Ye, Narayanan Ramamurthy
  • Publication number: 20050233460
    Abstract: A system and method for determining a coagulation time, e.g., TT, PT, aPTT, and ACT, of a test sample deposited in a test cartridge is disclosed. A cartridge housing having upper and lower major sides and a minor sidewall encloses a test chamber having a test chamber pivot element and is provided with a cartridge port for introducing a test sample into the test chamber,. Ferromagnetic agitator vane leaflets extend from an agitator pivot element supported by the test chamber pivot element intermediate the upper and lower major sides for rotational motion. The agitator vane leaflets can be swept, in response to an external magnetic field, through the test sample in the absence of coagulation. A timer is started when the agitator movement is commenced whereupon the agitator moves freely. Resistance to agitator movement due to coagulation is detected, and the coagulation time is measured.
    Type: Application
    Filed: April 19, 2004
    Publication date: October 20, 2005
    Inventors: Cynthia Clague, Daniel Cheek, Douglas Nippoldt
  • Publication number: 20050233466
    Abstract: A system and method for determining a coagulation time, e.g., TT, PT, aPTT, and ACT, of a blood test sample deposited in a test cartridge is disclosed. A cartridge housing having upper and lower major sides and a minor sidewall encloses a test chamber having a test chamber pivot element and is provided with a cartridge port for introducing a test sample into the test chamber,. Ferromagnetic agitator vane leaflets extend from an agitator pivot element supported by the test chamber pivot element intermediate the upper and lower major sides for rotational motion. The agitator vane leaflets can be swept, in response to an external magnetic field, through the test sample in the absence of coagulation. A timer is started when the agitator movement is commenced whereupon the agitator moves freely. Resistance to agitator movement due to coagulation is detected, and the coagulation time is measured.
    Type: Application
    Filed: July 15, 2004
    Publication date: October 20, 2005
    Inventors: David Wright, Timothy Kriewall, Daniel Cheek
  • Patent number: 6855119
    Abstract: A blood separation system is fully mechanized to collect blood from a patient, separate waste portions of the blood, wash the blood, and redirect the usable portions to a device for reinjecting the usable portions into the patient. The system provides screen displays with detailed setup instructions and instructs the operator at the appropriate times to do certain manual steps. Apparatus for sequestration of platelet rich plasma spins at a high speed sufficient to separate solid cells from the blood sample and then spins at a lower speed for a predetermined time to allow platelets to elute from the solid cells.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: February 15, 2005
    Assignee: Medtronic, Inc.
    Inventors: John Rivera, Son Le, Daniel Cheek, Richard Matt, Roger P. Kaminski
  • Publication number: 20020177799
    Abstract: The present invention is a blood separation system that is fully mechanized to collect blood from a patient, separate waste portions of the blood, wash the blood, and redirect the usable portions to a device for reinjecting the usable portions into the patient. The present invention prevents accidental activation of an improper operation that could cause harm to a patient or a shut down of the system by requiring confirmation of each step by an operator. The invention provides screen displays with detailed setup instructions, eliminating the need for secondary documentation that might not be allowed in a surgical environment. The invention also instructs the operator at the appropriate times to do certain manual steps such as opening and closing clamps. Since the opening and closing of clamps is a highly critical operation, confirmation of these steps is also required.
    Type: Application
    Filed: July 8, 2002
    Publication date: November 28, 2002
    Inventors: John Rivera, Son Le, Daniel Cheek, Richard Matt, Roger P. Kaminski