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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0408905 (2009-03-23) |
| 등록번호 | US8066167 (2011-11-16) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 518 인용 특허 : 131 |
Circular stapling instruments for cutting and applying one or more surgical staples to tissue are disclosed. The instruments include various forms of anvil locking systems designed to selectively prevent the anvil from moving axially relative to the stapling head of the stapling instrument. One embo
Circular stapling instruments for cutting and applying one or more surgical staples to tissue are disclosed. The instruments include various forms of anvil locking systems designed to selectively prevent the anvil from moving axially relative to the stapling head of the stapling instrument. One embodiment employs an elongated gear rack that is selectively engagable with locking gears to prevent axial motion of the elongated gear rack and an adjustment shaft used to axially position the anvil. Other embodiments employ a gear assembly that cooperates with the elongated gear rack. A locking member is movably supported by a handle assembly that houses the gear assembly and elongated gear rack. The locking member is configured for selective meshing engagement with the gear assembly to ultimately prevent axial movement of the gear rack and adjustment shaft.
What is claimed is: 1. A surgical stapling instrument, comprising:a handle assembly;a shaft assembly coupled to said handle assembly;a stapling head assembly operably coupled to said shaft assembly, said stapling head assembly comprising:a staple cartridge for supporting one or more surgical staples
What is claimed is: 1. A surgical stapling instrument, comprising:a handle assembly;a shaft assembly coupled to said handle assembly;a stapling head assembly operably coupled to said shaft assembly, said stapling head assembly comprising:a staple cartridge for supporting one or more surgical staples;a staple driver for engaging and driving the staples from said staple cartridge; anda knife movably supported in said stapling head assembly;a drive system for applying drive motions to said staple driver and said knife;an anvil movably supported relative to said staple cartridge for axial movement toward and away from said staple cartridge;an anvil adjustment assembly for selectively adjusting an axial position of the anvil relative to the staple cartridge, said anvil adjustment assembly comprising:an adjustment shaft movably supported by said handle assembly for selective axial travel therethrough; anda trocar portion coupled to said adjustment shaft for axial travel therewith, said trocar portion configured for removable attachment to said anvil and wherein said surgical stapling instrument further comprises:a force measurement system operably interfacing with said anvil adjustment assembly for measuring an amount of compression force applied to tissue clamped between said anvil and said staple cartridge; andan anvil locking system configured to cooperate with said anvil adjustment assembly to selectively lock and unlock the anvil in axial position relative to said staple cartridge, said anvil locking system comprising:an elongated gear rack coupled to one of said adjustment shaft and said trocar portion; anda locking assembly pivotally coupled to said handle assembly and configured to pivot between positions wherein said lockinq assembly retainingly engages said elongated gear rack and a position wherein said locking assembly does not engage said elongated gear rack.
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