# US 11,026,821 B2 · Device for catheter sheath retraction > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,026,821 B2 - Document ID: US11026821B2 - Status: Granted - Kind: B2 - Application number: 16/264,500 - Filed: 2019-01-31 - Published: 2019-05-30 - Granted: 2021-06-08 - Earliest claimed: 2007-07-11 - Assignees: C. R. Bard, Inc. - Applicants: C. R. Bard, Inc. - Inventors: Martin Wübbeling; Michael Vogel; Jurgen Dorn - Web page: https://patentgrep.com/patent/US11026821B2 ## CPC - A61F 2/95: Instruments specially adapted for placement or removal of stents or stent-grafts - A61F 2/966: with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod - A61M 25/0136: {Handles therefor} - A61F 2/9517: {handle assemblies therefor} - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - 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 stent delivery device includes a sheath covering a compressed stent and a housing. The housing includes a mover reel coupled to an actuator that rotates the mover reel in a winding direction when actuated. A sheath pull wire is coupled to the mover reel and the sheath. Rotation of the mover reel in the winding direction winds the sheath pull wire on the mover reel and moves the sheath in a proximal direction. A pre-mover is provided separate from the actuator, the pre-mover including an arm having a proximal end engaged with the mover reel to prevent rotation in the locked position. The pre-mover includes a pre-mover actuator coupled to the arm and having a portion projecting outside of the housing, wherein movement of the pre-mover actuator disengages the arm from the mover reel and rotates the mover reel a predetermined amount in the winding direction. ## Claims ### Claim 1 A stent delivery device having a locked position and a use position, comprising: a sheath covering a compressed stent; a housing including a mover reel, the mover reel designed to rotate in the housing, the mover reel coupled to a mover reel actuator, wherein actuation of the mover reel actuator rotates the mover reel in a winding direction; a sheath pull wire having a proximal end coupled to the mover reel and a distal end coupled to the sheath, wherein rotation of the mover reel in the winding direction winds the sheath pull wire on the mover reel and moves the sheath in a proximal direction; and a pre-mover separate from the mover reel actuator, the pre-mover comprising: an arm having a proximal end engaged with the mover reel to prevent rotation in the locked position; and a pre-mover actuator coupled to the arm and having a portion projecting outside of the housing, wherein movement of the pre-mover actuator disengages the arm from the mover reel and transitions the stent delivery device from the locked position to the use position, wherein disengagement of the arm from the mover reel rotates the mover reel a predetermined amount in the winding direction. ### Claim 2 (depends on 1) The stent delivery device according to claim 1, wherein the sheath pull wire has a wound length, further comprising a limiter that limits rotation of the mover reel after the wound length has been wound around the mover reel. ### Claim 3 (depends on 2) The stent delivery device according to claim 2, wherein the limiter comprises a tether connected to the mover reel through a line connector, and wherein the tether prevents further rotation of the mover reel when taut. ### Claim 4 (depends on 3) The stent delivery device according to claim 3, wherein the tether has a total length greater than a consumable length, and wherein the consumable length corresponds to the wound length. ### Claim 5 (depends on 4) The stent delivery device according to claim 4, wherein the tether includes reference markings indicating different consumable lengths corresponding to different wound lengths, the consumable lengths set by consuming the tether up to the reference markings indicating an amount of remaining consumable length, which corresponds to the wound length. ### Claim 6 (depends on 1) The stent delivery device according to claim 1, wherein the mover reel actuator includes a trigger pivotally mounted to the housing to pivot between an extended position and a depressed position, the trigger biased toward the extended position. ### Claim 7 (depends on 6) The stent delivery device according to claim 6, wherein pivoting the trigger between the extended position and the depressed position rotates a trigger gear engaged with the mover reel to rotate the mover reel. ### Claim 8 (depends on 7) The stent delivery device according to claim 7, wherein the trigger gear is coupled to a drive shaft by a one-way clutch, enabling the trigger gear to rotate the drive shaft when pivoting toward the depressed position, but preventing the trigger gear from rotating the drive shaft when returning to the extended position. ### Claim 9 (depends on 1) The stent delivery device according to claim 1, wherein the proximal end of the arm includes a rack gear. ### Claim 10 (depends on 9) The stent delivery device according to claim 9, wherein the pre-mover actuator comprises a button mounted on a slider pivotally connected to a distal end of the arm. ### Claim 11 (depends on 10) The stent delivery device according to claim 10, wherein the button is moved along a track in a proximal direction to transition the stent delivery device from the locked position to the use position. ### Claim 12 (depends on 11) The stent delivery device according to claim 11, wherein the track includes a first notch at a distal end of the track, and a second notch at a proximal end of the track, the first notch and the second notch providing tactile indications to a user regarding the location of the button along the track.