Rajesh V Iyer

US Patent:

6699265, Mar 2, 2004

Filed:

Nov 3, 2000

Appl. No.:

09/706447

Inventors:

Michael J. OPhelan - Oakdale MN
Brian L. Schmidt - Forest Lake MN
James M. Poplett - Plymouth MN
Robert R. Tong - Valencia CA
Richard J. Kavanagh - Brooklyn Park MN
Rajesh Iyer - Edina MN
Alexander Gordon Barr - Burnsville MN
Luke J. Christenson - White Bear Lake MN
Brian V. Waytashek - Lino Lakes MN
Brian D. Schenk - Coon Rapids MN
Gregory J. Sherwood - North Oaks MN

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 139

US Classification:

607 1, 607 5, 361520, 361509, 174 65 R

Abstract:

One embodiment includes a capacitor having a first anode stack having a first number of anode foils, a second anode stack having a second number of anode foils, where the first number of anode foils is different than the second number of anode foils. Another aspect provides a capacitor having a case having a curved interior surface, and first, second, and third capacitor modules that confront the curved interior surface of the case. One aspect provides a capacitor having one or more anodes and a cathode structure comprising a plurality of integrally connected cathode plates, the cathode structure having a serpentine shape, interweaving under and over each of the one or more anodes. One aspect provides a feedthrough assembly having an electrically conductive member dimensioned to extend at least partially through a feedthrough hole of a case of the capacitor, the conductive member having a passage therethrough. One aspect provides a capacitor having a first stack of capacitive elements a second stack of capacitive elements, wherein the first and second stacks are enclosed in separate compartments of a capacitor case that electrically isolate the electrolytes of each stack from one another. One aspect provides a capacitor case including a portion having opposing interior and exterior surfaces, with the portion having a hole; and a semi-permeable membrane adjacent the hole to regulate passage of fluids through the hole.

US Patent:

7072713, Jul 4, 2006

Filed:

Jan 15, 2004

Appl. No.:

10/758701

Inventors:

Michael J. O'Phelan - Oakdale MN, US
Brian L. Schmidt - Forest Lake MN, US
James M. Poplett - Plymouth MN, US
Robert R. Tong - Valencia CA, US
Richard J. Kavanagh - Brooklyn Park MN, US
Rajesh Iyer - Edina MN, US
Alexander Gordon Barr - Burnsville MN, US
Luke J. Christenson - White Bear Lake MN, US
Brian V. Waytashek - Lino Lakes MN, US
Brian D. Schenk - Coon Rapids MN, US
Gregory J. Sherwood - North Oaks MN, US

Assignee:

Cardiac Pacemakers, Inc. - Saint Paul MN

International Classification:

A61N 1/39

US Classification:

607 10, 607 5, 607 1, 361509, 174 65 R

Abstract:

One aspect provides a capacitor feedthrough assembly having an electrically conductive member dimensioned to extend at least partially through a feedthrough hole of a case of the capacitor, the conductive member having a passage therethrough.

US Patent:

7157671, Jan 2, 2007

Filed:

Jan 15, 2004

Appl. No.:

10/758677

Inventors:

Michael J. O'Phelan - Oakdale MN, US
Brian L. Schmidt - Forest Lake MN, US
James M. Poplett - Plymouth MN, US
Robert R. Tong - Valencia CA, US
Richard J. Kavanagh - Brooklyn Park MN, US
Rajesh Iyer - Edina MN, US
Alexander Gordon Barr - Burnsville MN, US
Luke J. Christenson - White Bear Lake MN, US
Brian V. Waytashek - Lino Lakes MN, US
Brian D. Schenk - Coon Rapids MN, US
Gregory J. Sherwood - North Oaks MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

H05B 3/58

US Classification:

219535, 607 1, 607 5, 361520, 361509, 174 65 R

Abstract:

One aspect provides a capacitor having a first stack of capacitive elements a second stack of capacitive elements, wherein the first and second stacks are enclosed in separate compartments of a capacitor case that electrically isolate the electrolytes of each stack from one another.

US Patent:

7187535, Mar 6, 2007

Filed:

Jan 30, 2006

Appl. No.:

11/343109

Inventors:

Rajesh V. Iyer - Eden Prairie MN, US
Daniel J. Koch - Lakeville MN, US
Shawn D. Knowles - Saint Francis MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01G 4/35
H01G 4/228

US Classification:

361302, 361307, 3613061, 607 5

Abstract:

A feedthrough assembly for guiding a plurality of terminal pins through the housing of an implantable medical device. The feedthrough assembly comprises a ferrule fixedly coupled to the housing and having an aperture therethrough, and a non-conductive supporting structure fixedly coupled to the plurality of terminal pins and disposed within the aperture. The supporting structure is configured to guide the plurality of terminal pins through the ferrule. A plurality of capacitors, which is fewer in number than the plurality of terminal pins, is fixedly coupled to the supporting structure and electrically coupled between the ferrule and selected ones of the plurality of terminal pins.

US Patent:

7281305, Oct 16, 2007

Filed:

Mar 31, 2006

Appl. No.:

11/278291

Inventors:

Rajesh V. Iyer - Eden Prairie MN, US
Susan A. Tettemer - Fridley MN, US
John P Tardiff - Corcoran MN, US
Shawn D. Knowles - Saint Francis MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01G 7/00

US Classification:

29 2542, 29593, 29609, 29832, 29852, 29855, 29858, 75414, 361302, 3613062, 361307, 427 79, 427 80

Abstract:

A method for attaching a capacitor to the feedthrough assembly of a medical device having a terminal pin comprises threading a first washer over the terminal pin, and placing a body of epoxy in contact with the first washer. The capacitor is positioned over the terminal pin such that the first washer and the body of epoxy are between the lower surface of the capacitor and a support surface. The body of epoxy is cured to couple the capacitor to the insulating structure. During curing, the body of epoxy is substantially confined between the upper surface and the lower surface by the ferrule, the insulating structure, the capacitor, and the first washer.

US Patent:

7347880, Mar 25, 2008

Filed:

Dec 5, 2003

Appl. No.:

10/728655

Inventors:

Michael J. O'Phelan - Oakdale MN, US
James M. Poplett - Plymouth MN, US
Robert R. Tong - Valencia CA, US
Rajesh Iyer - Edina MN, US
Alexander Gordon Barr - Burnsville MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

H01G 4/32

US Classification:

29 2503, 361508

Abstract:

A method of joining a connection member to a capacitor foil using a staking tool having a tip of less than 0. 030″ (0. 762 mm) in diameter. Another embodiment couples multiple connection members of a capacitor together by edge-connecting each connection member to its substantially flush neighboring connection members. In one aspect, a capacitor includes a multi-anode stack connected at a first weld by a weld joint less than 0. 060″ (1. 524 mm) in diameter and a tab attached to one of the anodes of the multi-anode stack at a second weld. In one aspect, an exemplary method joining one or more foils using a staking tool having a tip of less than approximately 0. 060″ (1. 524 mm) in diameter. In another aspect, a capacitor including a capacitor case having an electrolyte therein and a high formation voltage anode foil having a porous structure and located within the capacitor case.

US Patent:

7499817, Mar 3, 2009

Filed:

Sep 27, 2005

Appl. No.:

11/235944

Inventors:

Rajesh V. Iyer - Eden Prairie MN, US
Ryan J. Jensen - White Bear Township MN, US
Curtis E. Burgardt - Sauk Rapids MN, US
Susan A. Tettemer - Fridley MN, US
Daniel J. Koch - Lakeville MN, US
Simon E. Goldman - St. Louis Park MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

G06F 19/00

US Classification:

702 65, 703 1

Abstract:

A determination of an equivalent series resistance (ESR) effect for high frequency filtering performance of a filtered feed-through assembly is described. A low frequency signal is introduced to a filtered feed-through assembly. ESR limit of the filtered feed-through is determined based on the low frequency signal.

US Patent:

7502217, Mar 10, 2009

Filed:

Feb 16, 2007

Appl. No.:

11/675880

Inventors:

Jennifer J. Zhao - Plymouth MN, US
Micah A. Litow - Minneapolis MN, US
Rajesh Iyer - Eden Prairie MN, US
Dawit Y. Belete - Woodbury MN, US
Simon E. Goldman - St. Louis Park MN, US
Shawn D. Knowles - St. Francis MN, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

H01G 4/236
H01G 4/228
A61N 1/00

US Classification:

361307, 3613061, 607 2, 607 5

Abstract:

A filtering capacitor feedthrough assembly for an implantable active medical device is disclosed. The filtering capacitor feedthrough assembly includes a capacitor having an aperture, the capacitor is electrically grounded to an electrically conductive feedthrough ferrule or housing of the implantable active medical device. A terminal pin extends into the aperture and an electrically conductive continuous coil is disposed within the aperture and between the terminal pin and the capacitor. The electrically conductive continuous coil mechanically secures and electrically couples the terminal pin to the capacitor.