# US 2026/0069770 A1 · Drive mechanism for large volume delivery device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0069770 A1 - Document ID: US20260069770A1 - Status: Published application - Kind: A1 - Application number: 18/826,573 - Filed: 2024-09-06 - Published: 2026-03-12 - Earliest claimed: 2024-09-06 - Assignees: Sanofi-Aventis Deutschland GmbH - Applicants: Sanofi-Aventis Deutschland GmbH - Inventors: Marc Anderson; Donald Ziniti - Web page: https://patentgrep.com/patent/US20260069770A1 ## CPC - A61M 5/14248: {of the skin patch type} - A61M 5/1456: {with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir} - A61M 5/1413: {Modular systems comprising interconnecting elements} - A61M 5/1454: {spring-actuated, e.g. by a clockwork} - A61M 5/3157: {Means providing feedback signals when administration is completed (A61M5/20 takes precedence)} - A61M 5/2033: {Spring-loaded one-shot injectors with or without automatic needle insertion (multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287)} - A61M 2005/14272: {for emergency, field or home use, e.g. self-contained kits to be carried by the doctor} - A61M 2005/2407: {from the rear} - 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 system for delivering a medicament is provided. The system can include a drive mechanism configured to drive a plunger of a medicament container. The medicament container may be contained in a container sled, and the drive mechanism can be securely held by a drive holder adjacent the container sled. The drive holder can be secured within an external housing of the system allowing the container to move with the container sled to form a connection with a fluid delivery pathway. ## Claims ### Claim 1 A system for delivering medicament, comprising: an external housing; a medicament container sled within the external housing; a drive holder; a medicament container comprising a plunger and an internal volume to hold medicament; and a drive mechanism; wherein the drive mechanism is configured to enter the driver holder and to be securely retained in the drive holder. ### Claim 2 (depends on 1) The system of claim 1, wherein the drive mechanism comprises: a drive housing; a drive release latch, and a piston mechanism. ### Claim 3 (depends on 1) The system of claim 1, wherein the medicament container is configured to enter the medicament container sled and to be retained in the medicament container sled via a snap-fit mechanism on the medicament container sled. ### Claim 4 (depends on 1) The system of claim 1, wherein the medicament container sled is configured to move along a long axis of the system to engage the medicament container with a fluid path connector. ### Claim 5 (depends on 1) The system of claim 1, wherein the drive holder is configured to engage the drive mechanism via a snap-fit connection. ### Claim 6 (depends on 1) The system of claim 1, wherein the drive holder is secured within the external housing with at least one of a threaded connector, a snap-fit connection, a friction-fit, a mechanical stop, or a welded connection. ### Claim 7 (depends on 1) The system of claim 1, wherein the external housing comprises a long axis and a rear opening, and wherein the medicament container sled and drive holder are aligned with the drive housing and the rear opening such that the medicament container and drive mechanism can be inserted through the rear opening to assemble the system. ### Claim 8 (depends on 2) The system of claim 2, wherein the piston mechanism comprises comprising a drive outer sleeve and a detent. ### Claim 9 (depends on 1) The system of claim 1, further comprising and end-of-does (EOD) switch assembly comprising an EOD switch and an EOD switch printed circuit board assembly (PCBA), wherein the EOD switch is mounted on the EOD switch PCBA. ### Claim 10 (depends on 1) The system of claim 1, wherein the external housing comprises: a top cover; a bottom cover; and an end cap. ### Claim 11 A drive mechanism, comprising: a drive housing, wherein the drive housing comprises at least one ridge, at least one protrusion, and a pair of walls, a drive release latch, and a piston mechanism comprising a piston, a drive outer sleeve, and a detent, wherein the pair of walls are configured to interact with the drive release latch, and wherein the drive mechanism is configured to fit into a drive holder of an external housing. ### Claim 12 (depends on 11) The drive mechanism of claim 11, further comprising: an end of dose (EOD) switch assembly. ### Claim 13 (depends on 11) The drive mechanism of claim 11, wherein the drive holder comprises at least one snap-fit connector for securing the drive mechanism. ### Claim 14 (depends on 13) The drive mechanism of claim 13, wherein, upon inserting the drive mechanism into the drive holder, the drive mechanism is retained in the drive holder by mechanical stops formed by snapping the at least one ridge into the at least one snap-fit and by sliding the at least one protrusion into the at least one groove. ### Claim 15 (depends on 11) The drive mechanism of claim 11, wherein the pair of walls comprises first lock grooves and a second lock grooves, wherein the first lock grooves hold the drive release latch at an initial position, wherein the second lock grooves hold the drive release latch at an activated position. ### Claim 16 (depends on 15) The drive mechanism of claim 15, wherein the drive release latch faces a feature of a button sled through a window in the drive holder. ### Claim 17 (depends on 16) The drive mechanism of claim 16, wherein the drive release latch is configured to release the piston upon applying pressure onto the button sled. ### Claim 18 (depends on 17) The drive mechanism of claim 17, wherein upon applying the pressure onto the button sled, the drive release latch moves from the initial position to the activated position. ### Claim 19 (depends on 18) The drive mechanism of claim 18, wherein the piston is released when the drive release latch is at the activated position. ### Claim 20 (depends on 17) The drive mechanism of claim 17, wherein the piston is configured to move forward along an axis of the drive mechanism. ### Claim 21 (depends on 20) The drive mechanism of claim 20, wherein upon release, the piston moves forward along the axis to recover a gap between the piston and a plunger of a medicament container. ### Claim 22 (depends on 17) The drive mechanism of claim 17, wherein the piston is configured to push a medicament container sled along the axis by interacting with the plunger. ### Claim 23 (depends on 12) The drive mechanism of claim 12, wherein the drive mechanism is configured to release the EOD switch assembly upon detecting when a delivery device is nearing an end of desired dose prior to when an end of dose occurs.