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    • 6. 发明授权
    • Surgical stapler with improved locking mechanism
    • 手术吻合器具有改进的锁定机构
    • US5878938A
    • 1999-03-09
    • US909037
    • 1997-08-11
    • John R. BittnerWilliam G. BowserJoseph C. HueilDavid H. Ruder
    • John R. BittnerWilliam G. BowserJoseph C. HueilDavid H. Ruder
    • A61B17/072A61B17/04
    • A61B17/07207A61B2017/07285A61B2017/2945
    • A surgical stapler for effecting simultaneous cutting and stapling of tissue includes a frame and a staple cartridge positionable in the frame. The stapler includes a knife blade mounted for movement distally of the staple cartridge, the knife blade having a retraction lock feature including a locking portion for abutment to a roof member of a spacer carried on the frame in a locked position, to prevent movement of the knife blade, unless the stapler is fitted with a fresh, unused staple cartridge. The locking portion is spring loaded by a leaf spring into the locked position. The knife blade includes a spring notch which coacts with the leaf spring to mechanically lift and pivotally thrust the knife blade to the locked position when the knife blade is retracted after use. The lift or thrust feature clears out tissue accumulation which enhances the ability of the knife to restore to its full elevated return position.
    • 用于同时切割和缝合组织的外科缝合器包括框架和可定位在框架中的钉仓。 订书机包括安装成用于使钉仓向远侧移动的刀片,刀片具有缩回锁定特征,该缩回锁定特征包括锁定部分,该锁定部分用于在锁定位置抵靠承载在框架上的间隔件的顶部部件,以防止 刀片,除非订书机装有新鲜的未使用的订书钉盒。 锁定部分由板簧弹簧加载到锁定位置。 刀片包括弹簧切口,当刀片在使用后缩回时,弹簧切口与片簧共同作用以机械地提升并将刀片枢转地推动到锁定位置。 提升或推力特征清除组织堆积,这增强了刀恢复到其完全升高的返回位置的能力。
    • 7. 发明授权
    • Surgical stapling instrument with improved jaw closure and staple firing
actuator mechanism
    • 手术吻合器具,具有改进的颚关闭和缝合射击致动器机构
    • US5452836A
    • 1995-09-26
    • US192885
    • 1994-02-07
    • Thomas W. HuitemaThomas J. SierocukEric J. ButterfieldJoseph C. HueilKirk M. NicolaRobert L. Koch, Jr.
    • Thomas W. HuitemaThomas J. SierocukEric J. ButterfieldJoseph C. HueilKirk M. NicolaRobert L. Koch, Jr.
    • A61B17/068A61B17/072A61B17/28
    • A61B17/072A61B2017/07214A61B2017/2905A61B2017/2927A61B2017/2929
    • An improved surgical stapling instrument is provided for applying surgical staples to human tissue. The instrument has an articulated stapling head assembly mounted by a rotatable and flexible support shaft on an actuator handle assembly with an improved actuator mechanism for closing and firing the stapling head assembly. The stapling head assembly comprises a fixed jaw with a staple cartridge and a movable jaw with an anvil for clamping the tissue therebetween. The actuator mechanism comprises a jaw closure lever for closing the jaws and a staple firing lever for actuating a staple driver to drive the staples from the staple cartridge into the tissue and against the anvil. The actuator mechanism also includes a cam pulley mounted for rotation by the staple firing lever and secured to a firing cable for actuating the staple driver. A set of drive gears rotatably positioned on opposite sides of the cam pulley mesh with gear sectors on the staple firing lever to rotate the cam pulley and apply tension to the firing cable when the staple firing lever is actuated. The cam pulley has a contoured cam lobe for actuating the firing cable with different mechanical advantages as the pulley is rotated. An anti-backup member engages the cam pulley to prevent the pay-out of the firing cable before and after the staple firing lever is actuated. The length of the support shaft can be adjusted to set the tension in the closure cable so that the jaws are completely closed by the jaw closure lever to produce staples of uniform height when the staple firing lever is actuated.
    • 提供改进的外科缝合器械用于将外科缝合钉应用于人体组织。 仪器具有铰接式装订头组件,其通过可旋转和柔性的支撑轴安装在致动器手柄组件上,所述致动器手柄组件具有改进的致动器机构,用于关闭和点燃缝合头部组件。 装订头组件包括具有钉仓的固定夹爪和具有砧座的活动钳口,用于夹紧组织。 致动器机构包括用于封闭钳口的钳口闭合杆和用于致动钉仓驱动器以将订书钉从钉仓驱动到组织中并抵靠砧座的订书钉启动杆。 致动器机构还包括凸轮皮带轮,该凸轮皮带轮安装成用于由订书钉激发杆旋转并固定到用于致动订书针驱动器的击打电缆。 可旋转地定位在凸轮滑轮的相对侧上的一组驱动齿轮与订书钉发射杆上的齿轮部分啮合,以旋转凸轮滑轮并且当订书钉发射杆被致动时向张开线施加张力。 凸轮滑轮具有轮廓凸轮凸角,用于在滑轮旋转时用于致动具有不同机械优点的点火线缆。 防抱构件与凸轮滑轮接合,以防止在钉子击发杆被致动之前和之后发射击打电缆。 支撑轴的长度可以被调整以设定闭合电缆中的张力,使得钳口完全由钳口闭合杆闭合,以在钉子击发杆被致动时产生均匀高度的钉。