Patents by Inventor Joseph J. Viavattine
Joseph J. Viavattine 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).
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Publication number: 20150190941Abstract: Propylene carbonate is used as a lubricant for cutting lithium metal with a die having a metal cutting surface.Type: ApplicationFiled: January 9, 2014Publication date: July 9, 2015Inventor: Joseph J. Viavattine
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Patent number: 9054387Abstract: Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative portions. The grooves can be on the same or different faces of the mandrel. The grooves are dimensioned to accommodate a positive and negative feedthrough pin. The electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. Once wrapped, the removable portion can be detached. The positive portion and the negative portion are left in the electrode assembly insulated from each other. The mandrel allows tighter wrapping of the jelly roll assembly, increasing battery miniaturization and also results in electrode assemblies in which after-placement of tabs does not result in burrs or shorting.Type: GrantFiled: March 9, 2011Date of Patent: June 9, 2015Assignee: Medtronic, Inc.Inventors: Joseph J. Viavattine, Paul B. Aamodt, Hailiang (Jeff) Zhao
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Patent number: 8832914Abstract: A system for the automated coiling of a jelly roll electrode assembly for controlled assembly and tensioning of jelly roll assembly is provided. The system includes: a shuttle, and a mandrel to which electrodes are welded; a base, mateable with the shuttle and on which the battery head assembly is mounted for welding to the mandrel; and a coiling device. The coiling device has an upper spool, a lower spool, holding a separator strip and a platform between the two holding the base. The separator strip is threaded through a passage in the mandrel separating positive and negative portions. Rotating the mandrel coils the positive electrode, the separator strip and the negative electrode to coil around the mandrel. The coiling device may include a feedback loop braking one or both spools and allowing the coiling tension to be programmed to a desired level.Type: GrantFiled: September 12, 2011Date of Patent: September 16, 2014Assignee: Medtronic, IncInventors: Joseph J. Viavattine, Paul B. Aamodt, Sandeep Saurkar, Dona M. Suardini, Brent J. Torgerson
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Publication number: 20140163646Abstract: An implantable medical device (IMD) has a housing enclosing an electronic circuit. The housing includes a first housing portion, a second housing portion and a joint coupling the first housing portion to the second housing portion. A polymer enclosure member surrounds the joint and circumscribes the housing in various embodiments. Other embodiments of an IMD housing are disclosed.Type: ApplicationFiled: December 6, 2013Publication date: June 12, 2014Applicant: Medtronic, Inc.Inventors: Brad C. Tischendorf, John E. Kast, Thomas P. Miltich, Gordon O. Munns, Randy S. Roles, Craig L. Schmidt, Joseph J. Viavattine, Christian S. Nielsen, Prabhakar A. Tamirisa, Anthony M. Chasensky, Markus W. Reiterer, Chris J. Paidosh, Reginald D. Robinson, Bernard Q. Li, Erik R. Scott, Phillip C. Falkner, Xuan K. Wei, Eric H. Bonde
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Patent number: 8685557Abstract: Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative portions. The grooves can be on the same or different faces of the mandrel. The grooves are dimensioned to accommodate a positive and negative feedthrough pin. The electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. Once wrapped, the removable portion can be detached. The positive portion and the negative portion are left in the electrode assembly insulated from each other. The mandrel allows tighter wrapping of the jelly roll assembly, increasing battery miniaturization and also results in electrode assemblies in which after-placement of tabs does not result in burrs or shorting.Type: GrantFiled: March 9, 2011Date of Patent: April 1, 2014Assignee: Medtronic, Inc.Inventors: Joseph J. Viavattine, Paul B. Aamodt
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Publication number: 20130149560Abstract: An auxiliary electrode for a lithium-ion battery includes a lithium source material. The auxiliary electrode is configured to selectively couple to a negative electrode of a lithium-ion battery to provide lithium for formation of a solid-electrolyte-inter-phase layer on a negative electrode.Type: ApplicationFiled: April 26, 2012Publication date: June 13, 2013Inventors: Joseph J. Viavattine, Gaurav Jain, Prabhakar A. Tamirisa
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Publication number: 20130131744Abstract: The disclosure includes an electrochemical cell comprising a first cathode and a second cathodes are adjacent one another in a stacked arrangement to form a cathode stack in the electrochemical cell. The first cathode includes a first current collector and a first cathode form of active material covering the first current collector, and the second cathode includes a second current collector and a second cathode form of active material covering the second current collector. The second current collector is in electrical contact with the first current collector. The electrochemical cell further comprises an anode adjacent to the cathode stack, and a separator located between the cathode stack and the anode.Type: ApplicationFiled: November 22, 2011Publication date: May 23, 2013Applicant: Medtronic, Inc.Inventor: Joseph J. Viavattine
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Patent number: 8236442Abstract: An electrode for an electrochemical cell in an implantable medical device is presented. The electrode comprises a current collector with electrode material disposed thereon. The current collector includes an asymmetric aperture pattern that uniformly dissipates heat during current flow through the current collector.Type: GrantFiled: January 31, 2008Date of Patent: August 7, 2012Assignee: Medtronic, Inc.Inventor: Joseph J. Viavattine
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Publication number: 20120084979Abstract: A system for the automated coiling of a jelly roll electrode assembly for controlled assembly and tensioning of jelly roll assembly is provided. The system includes: a shuttle, and a mandrel to which electrodes are welded; a base, mateable with the shuttle and on which the battery head assembly is mounted for welding to the mandrel; and a coiling device. The coiling device has an upper spool, a lower spool, holding a separator strip and a platform between the two holding the base. The separator strip is threaded through a passage in the mandrel separating positive and negative portions. Rotating the mandrel coils the positive electrode, the separator strip and the negative electrode to coil around the mandrel. The coiling device may include a feedback loop braking one or both spools and allowing the coiling tension to be programmed to a desired level.Type: ApplicationFiled: September 12, 2011Publication date: April 12, 2012Inventors: Joseph J. Viavattine, Paul B. Aamodt, Sandeep Saurkar, Dona M. Suardini, Brent J. Torgerson
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Publication number: 20120084975Abstract: A system for the automated coiling of a jelly roll electrode assembly for controlled assembly and tensioning of jelly roll assembly is provided. The system includes: a shuttle, and a mandrel to which electrodes are welded; a base, mateable with the shuttle and on which the battery head assembly is mounted for welding to the mandrel; and a coiling device. The coiling device has an upper spool, a lower spool, holding a separator strip and a platform between the two holding the base. The separator strip is threaded through a passage in the mandrel separating positive and negative portions. Rotating the mandrel coils the positive electrode, the separator strip and the negative electrode to coil around the mandrel. The coiling device may include a feedback loop braking one or both spools and allowing the coiling tension to be programmed to a desired level.Type: ApplicationFiled: September 12, 2011Publication date: April 12, 2012Inventors: Joseph J. Viavattine, Paul B. Aamodt, Sandeep Saurkar, Dona M. Suardini, Brent J. Torgerson
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Publication number: 20110247204Abstract: Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative portions. The grooves can be on the same or different faces of the mandrel. The grooves are dimensioned to accommodate a positive and negative feedthrough pin. The electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. Once wrapped, the removable portion can be detached. The positive portion and the negative portion are left in the electrode assembly insulated from each other. The mandrel allows tighter wrapping of the jelly roll assembly, increasing battery miniaturization and also results in electrode assemblies in which after-placement of tabs does not result in burrs or shorting.Type: ApplicationFiled: March 9, 2011Publication date: October 13, 2011Applicant: Medtronic, Inc.Inventors: Joseph J. Viavattine, Paul B. Aamodt, Brent J. Torgerson
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Publication number: 20110250480Abstract: Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative portions. The grooves can be on the same or different faces of the mandrel. The grooves are dimensioned to accommodate a positive and negative feedthrough pin. The electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. Once wrapped, the removable portion can be detached. The positive portion and the negative portion are left in the electrode assembly insulated from each other. The mandrel allows tighter wrapping of the jelly roll assembly, increasing battery miniaturization and also results in electrode assemblies in which after-placement of tabs does not result in burrs or shorting.Type: ApplicationFiled: March 9, 2011Publication date: October 13, 2011Applicant: Medtronic, Inc.Inventors: Joseph J. Viavattine, Paul B. Aamodt, Hailiang(Jeff) Zhao
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Publication number: 20110250479Abstract: Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative portions. The grooves can be on the same or different faces of the mandrel. The grooves are dimensioned to accommodate a positive and negative feedthrough pin. The electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. Once wrapped, the removable portion can be detached. The positive portion and the negative portion are left in the electrode assembly insulated from each other. The mandrel allows tighter wrapping of the jelly roll assembly, increasing battery miniaturization and also results in electrode assemblies in which after-placement of tabs does not result in burrs or shorting.Type: ApplicationFiled: March 9, 2011Publication date: October 13, 2011Applicant: Medtronic, Inc.Inventors: Joseph J. Viavattine, Paul B. Aamodt
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Publication number: 20110250481Abstract: Provided is an electric storage battery including a jelly roll type electrode assembly having a mandrel. The mandrel includes a positive portion, a negative portion and a removable portion. In some embodiments, the mandrel is planar having two faces with a groove on each of the positive and negative portions. The grooves can be on the same or different faces of the mandrel. The grooves are dimensioned to accommodate a positive and negative feedthrough pin. The electrodes are wrapped around the mandrel using the removable portion to wind the mandrel. Once wrapped, the removable portion can be detached. The positive portion and the negative portion are left in the electrode assembly insulated from each other. The mandrel allows tighter wrapping of the jelly roll assembly, increasing battery miniaturization and also results in electrode assemblies in which after-placement of tabs does not result in burrs or shorting.Type: ApplicationFiled: March 9, 2011Publication date: October 13, 2011Applicant: Medtronic, Inc.Inventor: Joseph J. Viavattine
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Publication number: 20110223464Abstract: A battery cell is presented. The battery cell includes an anode, a cathode spaced from and operatively associated with the anode, an electrolyte operatively associated with the anode and the cathode. A layered separator includes a plurality of separator material layers disposed between the anode and cathode. The plurality of separator material layers includes a first layer and a second layer. The first layer is characterized by a first value of a physical property and the second layer is characterized by a second value of the physical property.Type: ApplicationFiled: May 20, 2011Publication date: September 15, 2011Inventors: Joseph J. Viavattine, John D. Norton, Christian S. Nielsen
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Patent number: 7785741Abstract: An electrochemical cell, comprising: a first electrode structure formed from a sheet of electrode material folded along a plurality of spaced apart intervals to form a U-fold structure having a plurality of spaced apart double-layer sections; and a second electrode structure spaced apart from and operatively disposed between the plurality of spaced-apart double layer sections of the first electrode structure.Type: GrantFiled: February 28, 2006Date of Patent: August 31, 2010Assignee: Medtronic, Inc.Inventor: Joseph J. Viavattine
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Publication number: 20100112430Abstract: An electrochemical cell is provided comprising a first electrode and a second electrode. A separator, which includes an expansion joint, surrounds and seals the first electrode. The separator may comprise a first major surface and a second major surface substantially opposite the first major surface, and the expansion joint may be coupled between the first major surface and the second major surface.Type: ApplicationFiled: January 14, 2010Publication date: May 6, 2010Inventors: Paul B. Aamodt, Joseph J. Viavattine
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Patent number: 7670716Abstract: An electrochemical cell is provided comprising a first electrode and a second electrode. A separator, which includes an expansion joint, surrounds and seals the first electrode. The separator may comprise a first major surface and a second major surface substantially opposite the first major surface, and the expansion joint may be coupled between the first major surface and the second major surface.Type: GrantFiled: April 28, 2006Date of Patent: March 2, 2010Assignee: Medtronic, Inc.Inventors: Paul B. Aamodt, Joseph J. Viavattine
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Publication number: 20090208816Abstract: An electrode in an electrochemical cell for an implantable medical device is presented. The electrode includes a plurality of electrode plates. Each electrode plate includes a tab extending therefrom. The tab is shaped in a H-shape, a T-shape, a Y-shape, and a L-shape.Type: ApplicationFiled: January 31, 2008Publication date: August 20, 2009Inventors: Joseph J. Viavattine, Kevin R. Aufderhar
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Publication number: 20090197170Abstract: A current collector for a battery in an implantable medical device is presented. The current collector comprises a conductive layer which includes a first surface and a second surface. A plurality of apertures are formed in the conductive layer such that a surface area of the conductive layer with the plurality of apertures to a surface area without the plurality of apertures is greater than 0.65.Type: ApplicationFiled: January 31, 2008Publication date: August 6, 2009Inventor: Joseph J. Viavattine