SPRING LOADED ANVIL RETAINER

• US 20130334279A1
• Filed: 04/26/2013
• Published: 12/19/2013
• Est. Priority Date: 06/19/2012
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Prior, Scott J.
• Granted Patent: US 9,351,734 B2
• Time in Patent Office: Days
• US Class Current: 227/175.1
• CPC Class Codes: A61B 17/064 Surgical staples, i.e. penetrating the tissue
• CPC Class Codes: A61B 17/105 Wound clamp magazines for packaging sharps A61B50/3001
• CPC Class Codes: A61B 17/1114 of the digestive tract, e.g. bowels or oesophagus
• 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 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/07235 containing different staples, e.g. staples of different shapes, sizes or materials
• CPC Class Codes: A61B 2017/07242 achieving different staple heights during the same shot, e.g. using an anvil anvil having different heights or staples of different sizes
• CPC Class Codes: A61B 2017/1132 End-to-end connections
• CPC Class Codes: A61B 2017/2916 pins in guiding slots

Abstract

A surgical stapling device including a handle assembly, a body portion extending distally from the handle assembly, a head portion including an anvil retainer and a shell assembly, the anvil retainer being movable in relation to the shell assembly between unapproximated and approximated positions, a tube surrounding a portion of the anvil retainer, wherein the anvil retainer includes a distal annular protrusion for releasably engaging an anvil assembly and wherein the anvil assembly includes a center rod.

Claims

1. An anvil receiving apparatus, comprising:

an anvil retainer operatively coupled to a surgical device; and

a tube surrounding a portion of the anvil retainer;

wherein the anvil retainer includes a distal annular protrusion for releasably engaging an anvil assembly and wherein the anvil assembly includes a center rod.

2. The apparatus as claimed in claim 1, wherein the tube has an outer diameter larger than an outer diameter of the center rod.

3. The apparatus as claimed in claim 1, wherein the tube has an outer diameter equal to the outer diameter of the center rod.

4. The apparatus as claimed in claim 1, wherein the tube comprises a proximal tube and a distal tube, wherein a resilient member is disposed between the proximal tube and the distal tube.

5. The apparatus as claimed in claim 4, wherein the anvil retainer further comprises a proximal protrusion configured to disable the proximal tube from moving proximally.

6. The apparatus as claimed in claim 4, wherein the center rod is configured to engage with the anvil retainer.

7. The apparatus as claimed in claim 4, wherein proximal advancement of the center rod onto the anvil retainer causes proximal advancement of the distal tube toward the proximal tube.

8. The apparatus as claimed in claim 6, wherein the center rod further comprises at least one resilient arm for releasably engaging the anvil retainer.

9. The apparatus as claimed in claim 8, wherein each of the at least one resilient arms further comprises an internal shoulder, and wherein the anvil retainer further comprises a distal annular protrusion configured to releasably engage the internal shoulder.

10. A surgical stapling device, comprising:

a handle assembly;

a body portion extending distally from the handle assembly;

a head portion including an anvil retainer and a shell assembly, the anvil retainer being movable in relation to the shell assembly between unapproximated and approximated positions; and

a tube surrounding a portion of the anvil retainer;

wherein the anvil retainer includes a distal annular protrusion for releasably engaging an anvil assembly and wherein the anvil assembly includes a center rod.

11. The device as claimed in claim 10, wherein the tube has an outer diameter larger than an outer diameter of the center rod.

12. The device as claimed in claim 10, wherein the tube has an outer diameter equal to the outer diameter of the center rod.

13. The device as claimed in claim 10, wherein the tube comprises a proximal tube and a distal tube, wherein a resilient member is disposed between the proximal tube and the distal tube.

14. The device as claimed in claim 13, wherein the anvil retainer further comprises a proximal protrusion configured to disable the proximal tube from moving proximally.

15. The device as claimed in claim 13, wherein the center rod is configured to engage with the anvil retainer.

16. The device as claimed in claim 13, wherein proximal advancement of the center rod onto the anvil retainer causes proximal advancement of the distal tube toward the proximal tube.

17. The device as claimed in claim 15, wherein the center rod further comprises at least one resilient arm for releasably engaging the anvil retainer.

18. The device as claimed in claim 17, wherein each of the at least one resilient arms further comprises an internal shoulder, and wherein the anvil retainer further comprises a distal annular protrusion configured to releasably engage the internal shoulder.