Surgical stapling instrument having a firing lockout for an unclosed anvil
First Claim
1. A surgical instrument comprising:
- a handle portion operable to produce a firing motion;
an implement portion responsive to the firing motions from the handle portion, the implement portion comprising;
an elongate channel coupled to the handle portion and including a channel slot, a staple cartridge received by the elongate channel, an anvil pivotally coupled to the elongate channel and including an anvil slot, a firing device longitudinally engaging the elongate channel and engageable to the anvil, and an anvil lockout mechanism oriented in the implement portion and connected to the anvil to impede the firing device from engaging the anvil when the anvil is open.
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Accused Products
Abstract
A surgical instrument for laparoscopic and endoscopic clinical procedures simultaneously severs and staples tissue clamped in an end effector comprising an elongate channel, which holds a staple cartridge, and a pivotally attached anvil. An E-beam firing bar engages the channel and selectively engages the anvil during distal firing movements, wherein the tissue is severed and stapled driven upward from the staple cartridge to form against the anvil. In particular an upper pin of the firing bar is disengaged from the anvil before firing. A ramped transition from an anvil to an anvil slot avoids misfiring when the end effector has clamped too much tissue, yet assists in successfully clamping a slightly excess amount of tissue.
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Citations
20 Claims
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1. A surgical instrument comprising:
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a handle portion operable to produce a firing motion;
an implement portion responsive to the firing motions from the handle portion, the implement portion comprising;
an elongate channel coupled to the handle portion and including a channel slot, a staple cartridge received by the elongate channel, an anvil pivotally coupled to the elongate channel and including an anvil slot, a firing device longitudinally engaging the elongate channel and engageable to the anvil, and an anvil lockout mechanism oriented in the implement portion and connected to the anvil to impede the firing device from engaging the anvil when the anvil is open. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A surgical instrument comprising:
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a handle portion operable to separately produce a firing motion and a closing motion;
an implement portion responsive to the separate firing and closing motions from the handle portion, the implement portion comprising;
an elongate channel coupled to the handle portion, an anvil pivotally coupled to the elongate channel and including a recess and an anvil slot, a firing device including a distally presented cutting edge longitudinally received between the elongate channel and the anvil, an upper member engageable to the anvil slot and a lower portion longitudinally engaging the elongate channel, the upper member residing within the anvil pocket when in an unfired position to allow the separate closing motion of the anvil, and an anvil lockout mechanism communicating between the anvil pocket and the anvil slot wherein the anvil lockout mechanism blocks the upper member when the anvil is not closed. - View Dependent Claims (10)
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11. An endo-surgical instrument, comprising:
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a handle portion operable to separately produce a firing motion and a closing motion;
an end effector sized for insertion through an endo-surgical cannula passageway; and
a shaft attached between the handle portion and the end effector and operably configured to separately transfer the firing and closing motions therebetween;
the end effector further comprising;
an elongate channel coupled to the shaft, an anvil pivotally coupled to the elongate channel responsive to the closing motion to move between an open position to a closed position, a firing device longitudinally received between the elongate channel and the anvil and including an upper member engageable to the anvil slot during distal movement for firing, and an anvil lockout mechanism operably configured to preclude distal movement of the firing device in response to an anvil open condition. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification