Methods and systems for delivering an implant using a planetary gear actuation assembly

Patent metadata

Field	Value
Publication number	US-2016123441-A1
Application number	US-201514932875-A
Country	US
Kind code	A1
Filing date	Nov 4, 2015
Priority date	Nov 4, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

A system for delivering an implant including a handle, a trigger, and an actuation assembly. The actuation assembly can include a planet carrier, at least one planet gear operatively coupled to the planet carrier, a sun gear shaft operatively engaged with the planet gear, a ring gear operatively engaged with the planet gear, a first clutch driver, and a second clutch driver. The actuation assembly can be configured to displace the outer tubular member in the proximal direction a distance (d) relative to the handle and to separately move the inner shaft member distally a distance (x) relative to the handle upon deployment of the trigger from a first position to a second position, and move the inner shaft member proximally a distance (y) relative to the handle with no displacement of the outer tubular member upon return of the trigger from the second position to the first position.

First claim

1 . An actuation assembly for an implant delivery system having a handle, a trigger, an outer tubular member and an inner shaft member, the inner shaft member being disposed within the outer tubular member and movable distally and proximally relative to the outer tubular member, the actuation assembly comprising:
a planet carrier; at least one planet gear operatively coupled to the planet carrier; a sun gear shaft operatively engaged with the planet gear; a ring gear operatively engaged with the planet gear; a first clutch driver configured to limit the sun gear shaft to uni-directional rotational motion; and a second clutch driver configured to uni-directionally lock the sun gear shaft and the planet carrier; wherein the actuation assembly is operatively coupled to the trigger and the inner and outer tubular members, and configured to displace the outer tubular member in the proximal direction a distance (d) relative to the handle and to separately move the inner shaft member distally a distance (x) relative to the handle upon deployment of the trigger from a first position to a second position, and further wherein the actuation assembly is configured to move the inner shaft member proximally a distance (y) relative to the handle with no displacement of the outer tubular member relative to the handle upon return of the trigger from the second position to the first position.

2 . The actuation assembly of claim 1 , wherein the second clutch driver is configured to uni-directionally lock the sun gear shaft and the planet carrier such that the sun gear shaft, planet carrier and the ring gear have a 1:1 ratio of rotation during deployment of the trigger from the first position to the second position.

2 . The actuation assembly of claim 1 , wherein the first clutch driver is configured to limit the sun gear shaft to uni-directional motion such that the sun gear shaft does not rotate during return of the trigger from the second position to the first position and the planetary gear rotates about the sun gear shaft.

3 . The actuation assembly of claim 2 , wherein the sun gear shaft is functionally coupled to the outer tubular member such that upon deployment of the trigger from the first position to the second position the sun gear shaft rotates and thereby causes the outer tubular member to move proximally.

4 . The actuation assembly of claim 2 , further comprising a shuttle frame having the planet carrier, the at least one planet gear, the sun gear shaft, the ring gear, the first clutch driver and the second clutch driver disposed thereon.

5 . The actuation assembly of claim 4 , wherein the shuttle frame is fixedly coupled to the outer tubular member.

6 . The actuation assembly of claim 5 , wherein the sun gear shaft is functionally coupled to the handle such that upon deployment of the trigger from the first position to the second position the sun gear shaft rotates and the shuttle frame moves proximally a distance relative to the handle.

7 . The actuation assembly of claim 6 , wherein the actuation assembly further comprises an intermediate gear functionally disposed on the shuttle frame between the sun gear shaft and the handle, and operatively engaged with the sun gear shaft.

8 . The actuation assembly of claim 4 , wherein the actuation assembly further comprises a ratchet rack fixedly coupled to the inner shaft member and disposed on the shuttle frame.

9 . The actuation assembly of claim 8 , wherein the ratchet rack is operatively meshed with the ring gear.

10 . The actuation assembly of claim 4 , wherein the actuation assembly further comprises at least one pin configured to engage at least one pin track disposed within the handle to thereby guide the shuttle frame along the handle.

11 . The actuation assembly of claim 10 , wherein the at least one pin comprises a first pin disposed through an axis of an intermediate gear functionally disposed on the shuttle frame between the sun gear shaft and the handle, and operatively engaged with the sun gear shaft.

12 . The actuation assembly of claim 11 , wherein the at least one pin comprises a second and third pin, each of the second and third pin disposed through the shuttle frame.

13 . The actuation assembly of claim 12 , wherein the at least one pin comprises a fourth pin disposed through an axis of the sun gear shaft.

14 . The actuation assembly of claim 4 , wherein the actuation assembly further comprises a plate disposed on the shuttle frame.

15 . The actuation assembly of claim 1 , wherein the actuation assembly is functionally coupled to the trigger by a driving rack.

16 . The actuation assembly of claim 15 , wherein the driving rack is operatively meshed with the planet carrier and the driving rack is supported by the shuttle frame.

17 . The actuation assembly of claim 1 , wherein the sun gear shaft comprises a sun gear portion, a sheath pinion, and a clutch engagement portion.

18 . The actuation assembly of claim 1 , wherein the planet carrier comprises a circumferential pinion, a clutch component, and at least one pin.

19 . The actuation assembly of claim 1 , wherein the ring gear comprises a circumferential pinion and a ring gear portion.

20 . The actuation assembly of claim 1 , wherein the first clutch driver and the second clutch driver each comprise a sun gear shaft engagement portion and a clutch portion.

Assignees

• Abbott Cardiovascular Systems

Inventors

• Gillick Matthew J
• Green Michael L

Classifications

• F16H57/02

  Gearboxes; Mounting gearing therein · CPC title

• A61F2/9517

  handle assemblies therefor · CPC title

• F16H19/04 Primary

  comprising a rack · CPC title

• F16H2057/02039

  Gearboxes for particular applications · CPC title

• F16H57/023

  Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly · CPC title