# US 12,005,262 B2 · Leadless pacemaker having attachment feature > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,005,262 B2 - Document ID: US12005262B2 - Status: Granted - Kind: B2 - Application number: 17/493,731 - Filed: 2021-10-04 - Published: 2022-01-27 - Granted: 2024-06-11 - Earliest claimed: 2018-03-09 - Assignees: Pacesetter, Inc. - Applicants: Pacesetter, Inc. - Inventors: Thomas B. Eby; Benjamin F. James, IV; Kavous Sahabi; Travis Lieber; Arees Garabed; Craig E. Mar; Sondra Orts; Tyler J. Strang; Jennifer Heisel; Bernhard Arnar; Daniel Coyle; Daniel Goodman; Scott Smith; Scott Kerns; David Rickheim; Adam Weber; Mike Sacha; Byron Liehwah Chun - Web page: https://patentgrep.com/patent/US12005262B2 ## CPC - A61N 1/3756: {Casings with electrodes thereon, e.g. leadless stimulators} - A61B 17/3468: {for implanting or removing devices, e.g. prostheses, implants, seeds, wires (devices for implanting seeds A61M37/0069)} - A61N 1/056: {Transvascular endocardial electrode systems} - A61N 1/362: Heart stimulators (heart defibrillators A61N1/39) - A61N 1/372: Arrangements in connection with the implantation of stimulators - A61N 1/378: Electrical supply - A61B 2017/00477: {Coupling (A61B2017/0046 takes precedence)} - A61M 25/0082: {Catheter tip comprising a tool} - A61M 25/0136: {Handles therefor} - A61N 2001/0578: {having means for removal or extraction} - A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A leadless biostimulator including an attachment feature to facilitate precise manipulation during delivery or retrieval is described. The attachment feature can be monolithically formed from a rigid material, and includes a base, a button, and a stem interconnecting the base to the button. The stem is a single post having a transverse profile extending around a central axis. The transverse profile can be annular and can surround the central axis. The leadless biostimulator includes a battery assembly having a cell can that includes an end boss. A tether recess in the end boss is axially aligned with a face port in the button to receive tethers of a delivery or retrieval system through an inner lumen of the stem. The attachment feature can be mounted on and welded to the cell can at a thickened transition region around the end boss. Other embodiments are also described and claimed. ## Claims ### Claim 1 A battery assembly for a leadless biostimulator, comprising: an electrolyte; and a cell can containing the electrolyte, wherein the cell can includes an annular wall extending proximally along a central axis, and an end boss extending from the annular wall to a proximal face, wherein an outer surface of the end boss has a smaller diameter than the annular wall, wherein the end boss includes a frustoconical surface tapering radially inward from the outer surface to the proximal face, and wherein the end boss includes a tether recess extending into the proximal face along the central axis. ### Claim 2 (depends on 1) The battery assembly of claim 1, wherein the cell can includes a transition region between the annular wall and the end boss, and wherein a wall thickness of the annular wall is less than a transition thickness of the transition region. ### Claim 3 (depends on 1) The battery assembly of claim 1, wherein the outer surface extends longitudinally from the annular wall. ### Claim 4 (depends on 1) The battery assembly of claim 1 further comprising a separator containing the electrolyte, wherein an inner surface of the annular wall is in contact with the separator. ### Claim 5 (depends on 4) The battery assembly of claim 4, wherein the separator includes a bag. ### Claim 6 (depends on 1) The battery assembly of claim 1, wherein the cell can extends proximally from a distal battery end to a proximal battery end, wherein the end boss is at the proximal battery end, and further comprising one or more terminals at the distal battery end. ### Claim 7 (depends on 1) The battery assembly of claim 1, wherein the proximal face of the end boss is orthogonal to the central axis. ### Claim 8 (depends on 1) The battery assembly of claim 1, wherein the tether recess is surrounded by an inner recess surface extending from the proximal face to a recess bottom, and wherein a proximal diameter of the inner recess surface at the proximal face is equal to or larger than a distal diameter of the inner recess surface at the recess bottom. ### Claim 9 (depends on 8) The battery assembly of claim 8, wherein the inner recess surface is cylindrical. ### Claim 10 (depends on 8) The battery assembly of claim 8, wherein the inner recess surface is tapered. ### Claim 11 (depends on 8) The battery assembly of claim 8 further comprising a transitional edge between the proximal face and the inner recess surface. ### Claim 12 A leadless biostimulator comprising: a battery assembly including a cell can containing an electrolyte, wherein the cell can includes an annular wall extending proximally along a central axis, and an end boss extending from the annular wall to a proximal face, wherein an outer surface of the end boss has a smaller diameter than the annular wall, wherein the end boss includes a frustoconical surface tapering radially inward from the outer surface to the proximal face, and wherein the end boss includes a tether recess extending into the proximal face along the central axis; and an attachment feature mounted on the cell can, wherein the attachment feature includes a button having a face port axially aligned with the tether recess. ### Claim 13 (depends on 12) The leadless biostimulator of claim 12, wherein the cell can includes a transition region between the annular wall and the end boss, and wherein a wall thickness of the annular wall is less than a transition thickness of the transition region. ### Claim 14 (depends on 12) The leadless biostimulator of claim 12, wherein the outer surface extends longitudinally from the annular wall. ### Claim 15 (depends on 12) The leadless biostimulator of claim 12, wherein the attachment feature includes a stem between the button and the end boss, and wherein the stem has a transverse profile extending around the central axis. ### Claim 16 (depends on 15) The leadless biostimulator of claim 15, wherein the attachment feature is monolithically formed from a rigid material, and wherein the stem is a single post. ### Claim 17 (depends on 15) The leadless biostimulator of claim 15, wherein the attachment feature includes an internal cavity extending from the face port through the stem, and wherein the internal cavity receives the end boss of the cell can. ### Claim 18 (depends on 17) The leadless biostimulator claim 17, wherein the transverse profile of the stem is annular and has an inner lumen axially aligned with the face port and the tether recess. ### Claim 19 (depends on 12) The leadless biostimulator of claim 12, wherein the attachment feature includes a distal flange coupled to the cell can by a weld at a transition region between the annular wall and the end boss. ### Claim 20 (depends on 19) The leadless biostimulator of claim 19, wherein the weld extends around a circumference of the cell can.