Cartridge assembly for a surgical stapling device

• US 9,138,226 B2
• Filed: 09/26/2011
• Issued: 09/22/2015
• Est. Priority Date: 03/30/2005
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Racenet, David C., Roy, Philip, Beardsley, John W., Olson, Lee Ann, Stearns, Ralph, Emmons, Clifford L.
• Primary Examiner(s): Lopez, Michelle
• Application Number:
  US13/245,222
• Publication Number:
  US 20120018326A1
• Time in Patent Office: 1,457 Days
• Field of Search: 227/175.1, 227/176.1, 227/178.1, 227/180.1, 227/19
• US Class Current: 1/1
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 2017/07278 characterised by its sled or its staple holder
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 2017/2902 characterized by features of the actuating rod
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft
• CPC Class Codes: A61B 2017/320052 Guides for cutting instruments

Abstract

A staple cartridge assembly comprising a cartridge housing, a plurality of staples, a plurality of staple pushers, and an actuation sled is disclosed. Each staple pusher includes a first base portion, and a second base portion laterally and longitudinally spaced from one another. The actuation sled disposed in the cartridge housing and is longitudinally translatable therethrough to move the staple pushers. The actuation sled includes at least a first cam wedge and a second cam wedge arranged to engage the first base portion and the second base portion of the pushers. The first cam wedge is laterally and longitudinally spaced apart from the second cam wedge.

Claims

1. A staple cartridge assembly, comprising:

a cartridge housing having a plurality of staple retention slots;

a plurality of staples disposed in the retention slots;

a plurality of staple pushers disposed along a longitudinal axis of the cartridge housing, wherein each staple pusher is movable between a first position and a second position, each staple pusher including a first base portion, a second base portion, and a plurality of pusher plates, the first base portion being laterally and longitudinally spaced from the second base portion, the first base portion being longitudinally fixed from movement with respect to the second base portion; and

an actuation sled disposed in the cartridge housing and longitudinally translatable therethrough, the actuation sled including at least a first cam wedge and a second cam wedge arranged to engage the first base portion and the second base portion of the pushers, the first cam wedge being laterally and longitudinally spaced apart from the second cam wedge.

2. The staple cartridge of claim 1, wherein longitudinal movement of the actuation sled sequentially engages each of the staple pushers and urges each of the staple pushers in a direction generally transverse to the longitudinal axis.

3. The staple cartridge of claim 1, wherein the cartridge housing includes a longitudinal slot and the actuation sled includes a member adapted to be received by the slot.

4. The staple cartridge of claim 1, wherein the staple pushers include recesses for engagement by the cam wedges.

5. The staple cartridge of claim 1, wherein the sled includes recesses for engagement by the staple pushers.

6. The staple cartridge of claim 1, wherein the first base portion is fixed from movement with respect to the second base portion.

7. The staple cartridge of claim 1, wherein the first base and the second base are longitudinally symmetrical with regards to each other.

8. A staple cartridge assembly, comprising:

a cartridge housing having a plurality of staple retention slots;

a plurality of staple pushers disposed along a longitudinal axis of the cartridge housing, wherein each staple pusher is movable between a first position and a second position, each staple pusher including a first base portion, and a second base portion, the first base portion being laterally and longitudinally spaced from the second base portion, the first base portion being longitudinally fixed from movement with respect to the second base portion; and

an actuation sled being longitudinally translatable through the cartridge housing, the actuation sled including at least a first cam wedge and a second cam wedge arranged to engage the first base portion and the second base portion of the pushers.