Surgical anvil manufacturing methods

{
  "publication_number": "US11266405B2",
  "country": "US",
  "kind": "B2",
  "title": "Surgical anvil manufacturing methods",
  "abstract": "A method for manufacturing a surgical stapling anvil is disclosed. The method comprises the steps of manufacturing a first anvil member and a second anvil member. The first anvil member comprises a tissue-facing surface comprising a plurality of staple forming pockets defined therein and a longitudinal cavity comprising anvil ledges configured to be engaged by anvil-camming portions of a firing member of a surgical stapling instrument. The method further comprises the steps of polishing the ledges of the first anvil member and welding the first anvil member and the second anvil member together.",
  "claims": [
    "1. A method for manufacturing a surgical stapling anvil, wherein said method comprises the steps of: manufacturing a first anvil member and a second anvil member, wherein: said first anvil member comprises: a tissue-facing surface comprising a plurality of staple forming pockets defined therein; a longitudinal cavity comprising first and second anvil-camming ledges configured to be engaged by anvil-camming portions of a firing member of a surgical stapling instrument; and first and second contact ledges; and said second anvil member comprises: third and fourth ledges; and first and second surfaces extending from and angled relative to said third and fourth ledges; polishing said first and second anvil-camming ledges of said first anvil member; positioning said third and fourth ledges on said first and second contact ledges; and welding said first anvil member and said second anvil member together along said first and second surfaces thereby forming a first weld and a second weld.",
    "2. The method of claim 1, wherein said manufacturing step comprises a metal injection molding process.",
    "3. The method of claim 1, wherein said welding step comprises a laser welding process.",
    "4. The method of claim 1, wherein said manufacturing step comprises an electrochemical machining process.",
    "5. The method of claim 1, wherein said manufacturing step comprises: metal injection molding said first anvil member; and stamping said staple forming pockets into said tissue-facing surface.",
    "6. The method of claim 5, wherein said manufacturing step further comprises metal injection molding said second anvil member.",
    "7. The method of claim 1, wherein said first anvil-camming ledge comprises a first zone and a second zone, wherein said first zone is configured to be contacted by one of said anvil-camming portions of said firing member, wherein said second zone extends laterally with respect to said first zone, and wherein said polishing step further comprises polishing said first zone and said second zone.",
    "8. The method of claim 1, wherein said first anvil member, said second anvil member, or a combination thereof, comprises a beveled edge to permit welding access.",
    "9. A method for manufacturing a surgical fastening anvil, wherein said method comprises the steps of: manufacturing an anvil body portion and an anvil cap member, wherein: said anvil body portion comprises: a planar tissue-facing surface comprising a plurality of fastener-forming pockets defined therein; first and second ledges each having a surface parallel to said planar tissue-facing surface; a longitudinal slot; and cam surfaces flanking said longitudinal slot and configured to be engaged by anvil-camming portions of a firing member of a surgical fastening instrument; and said anvil cap member comprises: third and fourth ledges each having a surface parallel to said planar tissue-facing surface; and first and second surfaces extending from said third and fourth ledges at an angle relative to said planar tissue-facing surface; polishing said cam surfaces of said anvil body portion; positioning said third and fourth ledges on said first and second ledges; and welding said anvil body portion and said anvil cap member together along said first and second surfaces.",
    "10. The method of claim 9, wherein said manufacturing step comprises a metal injection molding process.",
    "11. The method of claim 9, wherein said welding step comprises a laser welding process.",
    "12. The method of claim 9, wherein said manufacturing step comprises an electrochemical machining process.",
    "13. The method of claim 9, wherein said manufacturing step comprises: metal injection molding said anvil body portion; and stamping said fastener-forming pockets into said planar tissue-facing surface.",
    "14. The method of claim 9, wherein said anvil cap member further comprises an upper portion and a lower portion, wherein said lower portion is configured to be received within said longitudinal slot and said upper portion comprises said first and second surfaces and is configured to be welded to said anvil body portion.",
    "15. The method of claim 14, wherein said upper portion is flared compared to said lower portion.",
    "16. The method of claim 9, wherein welding said anvil body portion and said anvil cap member together along said first and second surfaces forms: a first weld penetration length equal to a length of said first surface; and a second weld penetration length equal to a length of said second surface.",
    "17. The method of claim 1, wherein: the first weld is separated from the first contact ledge by a first distance; and the second weld is separated from the second contact ledge by a second distance."
  ],
  "cpc": [
    "A61B 17/07207",
    "A61B 2017/00022",
    "A61B 2017/00398",
    "A61B 2017/0046",
    "A61B 2017/00473",
    "A61B 2017/00477",
    "A61B 2017/00526",
    "A61B 2017/00862",
    "A61B 2017/07242",
    "A61B 2017/07257",
    "A61B 2017/07264",
    "A61B 2017/07271",
    "A61B 2017/07278",
    "A61B 2017/07285",
    "A61B 2017/2927",
    "A61B 2017/2934",
    "B22F 3/225",
    "B23K 26/21"
  ],
  "assignees": [
    "CILAG GMBH INT"
  ],
  "filing_date": "2017-06-27",
  "publication_date": "2022-03-08",
  "grant_date": "2022-03-08",
  "priority_date": "2017-06-27",
  "application_number": "US-201715634024-A",
  "family_id": "60781908",
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