Adapter assembly including a removable trocar assembly

• US 10,111,684 B2
• Filed: 09/25/2015
• Issued: 10/30/2018
• Est. Priority Date: 09/25/2015
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Williams, Justin
• Primary Examiner(s): Smith, Scott A.
• Application Number:
  US14/865,602
• Publication Number:
  US 20170086879A1
• Time in Patent Office: 1,131 Days
• Field of Search: 227 19, 2271752, 2271753, 2271761, 2271801, 2271751, 606139, 606153, 606219
• CPC Class Codes: A61B 17/0644 penetrating the tissue, deformable to closed position
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 17/3417 Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating syringe needles A61M5/32; dilators A61M29/00
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00464 for use with different instruments with hole for different instruments A61B2017/22072
• CPC Class Codes: A61B 2017/00473 Distal part, e.g. tip or head A61B2017/00464 takes precedence
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/07214 Stapler heads
• CPC Class Codes: A61B 2017/07271 characterised by its cartridge
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable

Abstract

An adapter assembly for connecting a loading unit to a handle assembly is provided. The adapter assembly includes a sleeve, a trocar assembly releasably securable with the sleeve, and a locking mechanism configured to releasably secure the trocar assembly within the sleeve.

Claims

1. An adapter assembly for connecting a loading unit to a handle assembly, the adapter assembly comprising:

a sleeve;

a trocar assembly releasably securable with the sleeve, the trocar assembly including a housing defining first and second locking slots, wherein the trocar assembly moves longitudinally with respect to the sleeve and is configured to attach to an anvil assembly; and

a locking mechanism configured to releasably secure the trocar assembly within the sleeve, the locking mechanism including first and second locking members configured for selective reception within the first and second locking slots, respectively of the trocar housing.

2. The adapter assembly of claim 1, wherein the first and second locking members are moveable between a first position where the trocar assembly is securely received within the sleeve and a second position where the trocar assembly is removable from within the sleeve.

3. The adapter assembly of claim 2, wherein the locking mechanism further includes a button member for moving the first and second locking members between the first position and the second position.

4. The adapter assembly of claim 3, wherein the first and second locking members are biased to the first position by respective first and second springs.

5. The adapter assembly of claim 4, wherein the first and second locking members maintain the button member in an outward position when the first and second locking members are in the first position.

6. The adapter assembly of claim 1, further including upper and lower band guides, wherein first and second block members are movably supported on the upper and lower band guides.

7. The adapter assembly of claim 6, further including inner and outer flexible band assemblies, wherein the upper and lower band guides each define a longitudinal recess for accommodating the inner and outer flexible band assemblies.

8. The adapter assembly of claim 6, wherein the locking mechanism further includes a button member, wherein the button member is operably secured to the upper band guide.

9. The adapter assembly of claim 6, wherein each of the upper and lower band guides include a pair of cam posts for operably supporting the first and second locking members.

10. The adapter assembly of claim 1, further including a base, and a handle rotatably secured to the base, wherein the a proximal end of the sleeve is fixedly secured to the handle to permit rotation of the sleeve.

11. The adapter assembly of claim 1, further including a loading unit, wherein a plurality of staples are arranged in a circular array within the loading unit.

12. The adapter assembly of claim 1, wherein the trocar assembly includes a trocar having a distal portion configured for releasable engagement with the anvil assembly.