Raised boss for staple guide

• US 8,317,075 B2
• Filed: 08/01/2011
• Issued: 11/27/2012
• Est. Priority Date: 01/09/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Milliman, Keith L.
• Primary Examiner(s): Nash, Brian D
• Application Number:
  US13/195,207
• Publication Number:
  US 20110284617A1
• Time in Patent Office: 484 Days
• Field of Search: 227/179.1, 227/19, 227/175.1
• US Class Current: 227/179.1
• 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 2017/07257 characterised by its anvil

Abstract

A surgical stapling device including a handle assembly, a body portion, and a head portion is disclosed. The handle assembly includes a firing trigger. The body portion extends distally from the handle assembly. The head portion includes an anvil assembly and a shell assembly. The anvil assembly is movable in relation to the shell assembly between spaced and approximated positions. The shell assembly includes a pusher and an inner guide portion. The pusher includes at least one slot therein and is movable in relation to the anvil assembly between retracted and extended positions. The inner guide portion is disposed adjacent at least a portion of the pusher and includes a raised boss extending therefrom. The raised boss is configured to shroud the slot in the pusher when the pusher is in the retracted position.

Claims

1. A surgical stapling device comprising:

a handle assembly including a firing trigger;

a body portion extending distally from the handle assembly;

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

a pusher including at least one slot therein, the pusher being movable in relation to the anvil assembly between retracted and extended positions; and

an inner guide portion disposed adjacent at least a portion of the pusher, the inner guide portion including a raised boss extending therefrom and being affixed thereto and integrally formed therewith, the raised boss being configured to shroud the at least one slot in the pusher when the pusher is in the retracted position, wherein an inner diameter of the raised boss is equal to an inner diameter of the inner guide portion.

2. The surgical stapling device of claim 1, wherein an outer diameter of the raised boss is equal to an outer diameter of the inner guide portion.

3. The surgical stapling device of claim 2, further including a tapered portion disposed on at least one of the inner guide portion and the raised boss.

4. A surgical stapling device comprising:

a handle assembly including a firing trigger;

a body portion extending distally from the handle assembly;

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

a pusher including at least one slot therein, the pusher being movable in relation to the anvil assembly between retracted and extended positions; and

an inner guide portion disposed adjacent at least a portion of the pusher, the inner guide portion including a raised boss extending therefrom and being affixed thereto and integrally formed therewith, the raised boss being configured to shroud the at least one slot in the pusher when the pusher is in the retracted position, wherein the inner guide portion and the raised boss are monolithically formed.

5. A surgical stapling device comprising:

a handle assembly;

a body portion extending distally from the handle assembly;

a head portion including an anvil assembly and a shell assembly, at least one of the anvil assembly and the shell assembly being movable in relation to the other between spaced and approximated positions, the shell assembly including;

a pusher including at least one slot therein, the pusher being movable in relation to the anvil assembly between retracted and extended positions; and

an inner guide portion disposed adjacent at least a portion of the pusher, the inner guide portion including a raised boss extending therefrom and being monolithically formed therewith, the raised boss being configured to shroud the at least one slot in the pusher when the pusher is in the retracted position, at least a portion of the raised boss being tapered.

6. A surgical stapling device according to claim 5, wherein a proximal portion of the raised boss is tapered.

7. A surgical stapling device according to claim 6, wherein a portion of the raised boss that is disposed distally of the tapered portion is parallel to a longitudinal axis defined by the inner guide portion.