Patents by Inventor Xiangqun Chen

Xiangqun Chen 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: 20220087708
    Abstract: A blade for a cutting instrument includes a handle, a body, and at least three cutting edges along the body. The body has first and second sides extending along a longitudinal center axis. The body has a proximal end at the handle and a distal tip remote from the handle. The at least three cutting edges are oriented at corresponding angles with respect to the longitudinal center axis and are asymmetrically distributed with respect to the longitudinal center axis.
    Type: Application
    Filed: June 18, 2021
    Publication date: March 24, 2022
    Inventors: Xiangqun Chen, Rodney Hawkins, Adam Evard, Alex Soriano, Ofer Rosenzweig
  • Patent number: 10682519
    Abstract: A pulse generator comprises a header connector assembly coupled with a housing. The header connector assembly includes a connector assembly and a header enclosing the connector assembly. The connector assembly includes an electrically insulative segment, a first electrically conductive segment, and a second electrically conductive segment axially spaced apart from the first electrically conductive segment by the electrically insulative segment. Each electrically conductive segment includes a connector ring, a spring housing and a spring supported by the spring housing. The connector ring and spring housing are in electrical communication with each other. The electrically insulative segment includes an insulator ring that is positioned between the first and second electrically conductive segments. The insulator ring includes a first end and a second end axially opposite the first end.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: June 16, 2020
    Assignee: PACESETTER, INC.
    Inventors: Asghar Dadashian, Kavous Sahabi, Avi Bilu, Ofer Rosenzweig, Arees Garabed, Armando M. Cappa, Evan Sheldon, Xiangqun Chen, Alexander Robertson
  • Patent number: 10201699
    Abstract: A therapy lead has a distal header, a helix-shaft assembly, and a ring seal. The distal header has a cylindrical passage, and the helix-shaft assembly has a shaft and a helical anchor distally extending from the shaft. The shaft extends through the cylindrical passage. The ring seal circumferentially extends about the shaft and inside the cylindrical passage. The ring seal has a proximal face, a distal face, an outer circumferential surface, an inner circumferential surface, and a side wall. The distal face is opposite the proximal face. The outer circumferential surface extends between the proximal face and distal face. The inner circumferential surface is opposite the outer circumferential surface and extends between the proximal face and distal face. The inner circumferential surface defines a center hole of the ring seal that extends between the proximal face and distal face.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: February 12, 2019
    Assignee: PACESETTER, INC.
    Inventors: Matthew Malone, Tyler Smith, Tyler Strang, Xiangqun Chen, Steven R. Conger, Jeremy Hurwitz
  • Patent number: 10105536
    Abstract: A leadless pulse generator is disclosed herein. The leadless pulse generator has a body, a helical anchor, an electrode, and a sleeve. The body includes a distal end and a proximal end opposite the distal end. The helical anchor distally extends from the distal end. The electrode is at the distal end. The sleeve distally extends from the distal end and has a proximal face and a distal face opposite the proximal face. The proximal face is adjacent the body. The sleeve coaxially extends about the helical anchor and further has a biased state wherein the distal face is near a distal tip of the helical anchor. The sleeve is configured to compress such that the distal face displaces proximally towards the proximal face upon the distal face being forced against the cardiac tissue in the course of the helical anchor screwing into the cardiac tissue.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: October 23, 2018
    Assignee: PACESETTER, INC.
    Inventors: Sondra Orts, Carl Lance Boling, Matthew G. Fishler, Benjamin F. James, IV, Xiangqun Chen
  • Publication number: 20180133465
    Abstract: A leadless pulse generator is disclosed herein. The leadless pulse generator has a body, a helical anchor, an electrode, and a sleeve. The body includes a distal end and a proximal end opposite the distal end. The helical anchor distally extends from the distal end. The electrode is at the distal end. The sleeve distally extends from the distal end and has a proximal face and a distal face opposite the proximal face. The proximal face is adjacent the body. The sleeve coaxially extends about the helical anchor and further has a biased state wherein the distal face is near a distal tip of the helical anchor. The sleeve is configured to compress such that the distal face displaces proximally towards the proximal face upon the distal face being forced against the cardiac tissue in the course of the helical anchor screwing into the cardiac tissue.
    Type: Application
    Filed: January 16, 2018
    Publication date: May 17, 2018
    Inventors: Sondra Orts, Carl Lance Boling, Matthew G. Fishler, Benjamin F. James, IV, Xiangqun Chen
  • Patent number: 9907953
    Abstract: A leadless pulse generator is disclosed herein. The leadless pulse generator has a body, a helical anchor, an electrode, and a sleeve. The body includes a distal end and a proximal end opposite the distal end. The helical anchor distally extends from the distal end. The electrode is at the distal end. The sleeve distally extends from the distal end and has a proximal face and a distal face opposite the proximal face. The proximal face is adjacent the body. The sleeve coaxially extends about the helical anchor and further has a biased state wherein the distal face is near a distal tip of the helical anchor. The sleeve is configured to compress such that the distal face displaces proximally towards the proximal face upon the distal face being forced against the cardiac tissue in the course of the helical anchor screwing into the cardiac tissue.
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: March 6, 2018
    Assignee: PACESETTER, INC.
    Inventors: Sondra Orts, Carl Lance Boling, Matthew G. Fishler, Benjamin F. James, IV, Xiangqun Chen
  • Publication number: 20170354825
    Abstract: A pulse generator comprises a header connector assembly coupled with a housing. The header connector assembly includes a connector assembly and a header enclosing the connector assembly. The connector assembly includes an electrically insulative segment, a first electrically conductive segment, and a second electrically conductive segment axially spaced apart from the first electrically conductive segment by the electrically insulative segment. Each electrically conductive segment includes a connector ring, a spring housing and a spring supported by the spring housing. The connector ring and spring housing are in electrical communication with each other. The electrically insulative segment includes an insulator ring that is positioned between the first and second electrically conductive segments. The insulator ring includes a first end and a second end axially opposite the first end.
    Type: Application
    Filed: June 8, 2016
    Publication date: December 14, 2017
    Inventors: Asghar Dadashian, Kavous Sahabi, Avi Bilu, Ofer Rosenzweig, Arees Garabed, Armando M. Cappa, Evan Sheldon, Xiangqun Chen, Alexander Robertson
  • Publication number: 20170239465
    Abstract: A therapy lead has a distal header, a helix-shaft assembly, and a ring seal. The distal header has a cylindrical passage, and the helix-shaft assembly has a shaft and a helical anchor distally extending from the shaft. The shaft extends through the cylindrical passage. The ring seal circumferentially extends about the shaft and inside the cylindrical passage. The ring seal has a proximal face, a distal face, an outer circumferential surface, an inner circumferential surface, and a side wall. The distal face is opposite the proximal face. The outer circumferential surface extends between the proximal face and distal face. The inner circumferential surface is opposite the outer circumferential surface and extends between the proximal face and distal face. The inner circumferential surface defines a center hole of the ring seal that extends between the proximal face and distal face.
    Type: Application
    Filed: February 23, 2016
    Publication date: August 24, 2017
    Inventors: Matthew Malone, Tyler Smith, Tyler Strang, Xiangqun Chen, Steven R. Conger, Jeremy Hurwitz
  • Publication number: 20170106185
    Abstract: A leadless pulse generator is disclosed herein. The leadless pulse generator has a body, a helical anchor, an electrode, and a sleeve. The body includes a distal end and a proximal end opposite the distal end. The helical anchor distally extends from the distal end. The electrode is at the distal end. The sleeve distally extends from the distal end and has a proximal face and a distal face opposite the proximal face. The proximal face is adjacent the body. The sleeve coaxially extends about the helical anchor and further has a biased state wherein the distal face is near a distal tip of the helical anchor. The sleeve is configured to compress such that the distal face displaces proximally towards the proximal face upon the distal face being forced against the cardiac tissue in the course of the helical anchor screwing into the cardiac tissue.
    Type: Application
    Filed: October 15, 2015
    Publication date: April 20, 2017
    Inventors: Sondra Orts, Carl Lance Boling, Matthew G. Fishler, Benjamin F. James, IV, Xiangqun Chen
  • Patent number: 8554338
    Abstract: An implantable lead is provided that comprises a lead body and a header assembly. The lead body has a distal end and a proximal end. The lead body is configured to be implanted in a patient. The header assembly is provided at the distal end of the lead body and includes an internal chamber and a tissue engaging end. An electrode is provided on the header assembly. The electrode is configured to deliver a stimulating pulse. A resonant inductor is located within the chamber in the header assembly. An electrically floating heat spreader is provided on the header assembly. The heat spreader is located proximate to the resonant inductor and is positioned on the header assembly to cover at least a portion of the resonant inductor. The heat spreader is thermally coupled to the resonant inductor to convey thermal energy away from the header assembly.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: October 8, 2013
    Assignee: Pacesetter, Inc.
    Inventors: Phong D. Doan, Xiaoyi Min, Ingmar Viohl, Xiangqun Chen, Jose Lepe
  • Patent number: 8521304
    Abstract: An implantable lead includes a lead body having a proximal end portion and a distal end portion with a connector located at the proximal end and an electrode located at the distal end. The implantable lead further includes a coil conductor that has spiral sections wound within a lumen of the lead body and couples the lead connector to the electrode. The coil conductor has an insulation material provided on at least a segment of the coil conductor. The insulation material has a dielectric constant set such that the coil conductor forms a distributed band stop filter when exposed to a known RF magnetic field. The coil conductor comprises a filar wound into the spiral sections. The filar of the coil conductor has an insulation coating provided thereon with the insulation coating forming a dielectric layer between adjacent spiral sections of the filar.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: August 27, 2013
    Assignee: Pacesetter, Inc.
    Inventors: Xiangqun Chen, Xiaoyi Min
  • Publication number: 20130110205
    Abstract: Implementations of the present disclosure involve an implantable medical pulse generator for administering electrotherapy via an implantable medical lead having a lead connector end on a proximal end of the lead. The pulse generator may include a can and a header coupled to the can. The header may include a lead connector end receiving receptacle for transmitting electrical pulses from the can to the lead through one or more electrical spring contacts in electrical communication with one or more terminals of the lead connector end. The one or more spring contacts may include a triangular shaped metal spring within a housing that forms an electrical contact with the lead connector end when the one or more terminals of the lead connector end is inserted into the header. Alternatively, the metal spring may take other shapes, such as, for example, circular, elliptical, or rectangular.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 2, 2013
    Applicant: PACESETTER, INC.
    Inventors: Wisit Lim, Xiangqun Chen, Mitch Goodman
  • Publication number: 20130110204
    Abstract: Implementations of the present disclosure involve an implantable medical pulse generator for administering electrotherapy via an implantable medical lead having a lead connector end on a proximal end of the lead. The pulse generator may include a can and a header coupled to the can. The header may include a lead connector end receiving receptacle for transmitting electrical pulses from the can to the lead through one or more electrical spring contacts in electrical communication with one or more terminals of the lead connector end. The one or more spring contacts may include a triangular shaped metal spring within a housing that forms an electrical contact with the lead connector end when the one or more terminals of the lead connector end is inserted into the header. Alternatively, the metal spring may take other shapes, such as, for example, circular, elliptical, or rectangular.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 2, 2013
    Applicant: PACESETTER, INC.
    Inventors: Wisit Lim, Xiangqun Chen, Mitch Goodman
  • Patent number: 8142363
    Abstract: Embodiments include a cardiac rhythm management system having a lead that includes an omni-directional pressure sensor that is configured to resist tissue in-growth and provide reliable and consistent pressure readings from within a patient's vasculature. Embodiments of the cardiac rhythm management lead may also include a variety of pacing and shocking electrodes.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: March 27, 2012
    Assignee: Pacesetter, Inc.
    Inventors: Neal L. Eigler, James S. Whiting, Brian M. Mann, Werner Hafelfinger, Xiangqun Chen, Phong D. Doan
  • Publication number: 20110301676
    Abstract: An implantable medical lead configured to reduce resonant currents in a resonating circuit during MRI scans and a method of manufacturing the same are disclosed herein. The method of manufacturing includes providing a medical lead comprising an electrical pathway from a tip electrode located at a distal end of the lead to a lead connector located at a proximal end and coupling a resonating circuit to the tip electrode such that the resonating circuit is in the electrical pathway for the tip electrode. Further, the method includes coupling a capacitive element to a proximal end of the resonating circuit. The capacitive element is configured to shunt at least part of an RF current induced on the electrical pathway into surrounding tissue or fluid and also works as a heat sink to spread the heat from the internal LC resonant circuit.
    Type: Application
    Filed: June 2, 2010
    Publication date: December 8, 2011
    Applicant: PACESETTER, INC.
    Inventors: Jin Zhang, Xiaoyi Min, Ingmar Viohl, Gabriel A. Mouchawar, Xiangqun Chen
  • Publication number: 20110106231
    Abstract: An implantable lead is provided that comprises a lead body and a header assembly. The lead body has a distal end and a proximal end. The lead body is configured to be implanted in a patient. The header assembly is provided at the distal end of the lead body and includes an internal chamber and a tissue engaging end. An electrode is provided on the header assembly. The electrode is configured to deliver a stimulating pulse. A resonant inductor is located within the chamber in the header assembly. An electrically floating heat spreader is provided on the header assembly. The heat spreader is located proximate to the resonant inductor and is positioned on the header assembly to cover at least a portion of the resonant inductor. The heat spreader is thermally coupled to the resonant inductor to convey thermal energy away from the header assembly.
    Type: Application
    Filed: November 5, 2009
    Publication date: May 5, 2011
    Applicant: PACESETTER, INC.
    Inventors: Phong D. Doan, Xiaoyi Min, Ingmar Viohl, Xiangqun Chen, Jose Lepe
  • Patent number: 7899550
    Abstract: A lead implanted across a heart wall such as an atrial septum includes structure for fixation to the wall. In some embodiments the distal end of the lead includes a sensor for measuring quantities such as pressure at a distal side of the wall. The fixation structures may be positioned on opposite sides of the wall after implant. The fixation structures may be aligned with the lead during delivery of the lead to the implant site and expanded from the lead at the implant site.
    Type: Grant
    Filed: August 21, 2006
    Date of Patent: March 1, 2011
    Assignee: Pacesetter, Inc.
    Inventors: Phong D. Doan, Xiangqun Chen, Apratim Dixit, Virote Indravudh
  • Publication number: 20100318164
    Abstract: An implantable lead comprises a lead connector and an electrode configured to perform at least one of a sensing operation and delivery of electrical energy. The implantable lead also includes a lead body having a proximal end portion and a distal end portion with the connector located at the proximal end and the electrode located at the distal end. The lead body of the implantable lead has a length that includes a lumen that extends longitudinally between the distal and proximal end portions. The implantable lead further includes a coil conductor that has spiral sections wound within the lumen and extend from the lead connector along the lumen. The coil conductor couples the lead connector to the electrode. The coil conductor has an insulation material provided on at least a segment of the coil conductor. The insulation material has a dielectric constant set such that the coil conductor forms a distributed band stop filter when exposed to a known RF magnetic field.
    Type: Application
    Filed: May 5, 2010
    Publication date: December 16, 2010
    Applicant: PACESETTER, INC.
    Inventors: Xiangqun Chen, Xiaoyi Min
  • Publication number: 20100298663
    Abstract: A system and method for detecting and treating irregular metabolic function. The systems and methods generally include an implantable medical device that measures various physiological parameters. Such physiological parameters generally provide an indication of the patient's metabolic rate, respiratory rate, and activity level. For example, the medical device may measure the patient's relative movement, or may measure the patient's oxygen consumption. These measures are then recorded, and the recorded data is used to determine the normal relationship between metabolic rate and other physiological parameters for that patient. The baseline relationship is then used to determine if the patient experiences an increase or decrease in metabolic rate that is not explained by changes in other physiological parameters. Further testing, and treatment if necessary, can be performed if the physiological parameters indicate irregular metabolic function.
    Type: Application
    Filed: May 20, 2009
    Publication date: November 25, 2010
    Applicant: PACESETTER, INC.
    Inventors: Xiangqun Chen, Keith Victorine
  • Publication number: 20050109280
    Abstract: A carbon nanotube fabricating system and method that includes a process chamber that supports a substrate. The system employs a high intensity thermal radiation source for heating the chamber, and a temperature regulation chuck that supports the substrate. In process, the chuck cools the substrate so as to prevent damage to the substrate, while CNT fabrication is preferably regulated to occur in a process window.
    Type: Application
    Filed: September 21, 2004
    Publication date: May 26, 2005
    Inventors: Xiangqun Chen, Dennis Adderton