Surgical stapling instrument having multistroke firing with opening lockout
First Claim
1. A surgical instrument, comprising:
- an elongate implement portion responsive to a firing motion and a closure motion;
a firing mechanism operably configured to produce the firing motion between an unfired position and a fully fired position to eject a staple from a staple cartridge into tissue;
a closing mechanism operably configured to close and to open the implement portion;
a closing release mechanism operably configured to lock the closing mechanism when the implement portion is in the fully closed position, and responsive to an operator command to unlock the closing mechanism when the firing mechanism is in an unfired position; and
a lockout mechanism operably configured to lock the closing release mechanism when;
(i) the implement portion is in the fully closed position, and(ii) the firing mechanism is in any position other than the unfired position.
6 Assignments
0 Petitions
Accused Products
Abstract
A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required to fire (i.e., staple and sever) the end effector. A linked transmission reduces the required handle longitudinal length, yet achieves a rigid, strong configuration when straightened for firing. A traction biased firing mechanism avoids binding in driving this straightened linked rack in cooperation with an anti-backup mechanism, with a lockout mechanism that prevents releasing the closure trigger during firing. Furthermore, an external indicator gives feedback to the surgeon as to how far firing has progressed, as well as providing a manual retraction capability.
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Citations
7 Claims
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1. A surgical instrument, comprising:
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an elongate implement portion responsive to a firing motion and a closure motion; a firing mechanism operably configured to produce the firing motion between an unfired position and a fully fired position to eject a staple from a staple cartridge into tissue; a closing mechanism operably configured to close and to open the implement portion; a closing release mechanism operably configured to lock the closing mechanism when the implement portion is in the fully closed position, and responsive to an operator command to unlock the closing mechanism when the firing mechanism is in an unfired position; and a lockout mechanism operably configured to lock the closing release mechanism when; (i) the implement portion is in the fully closed position, and (ii) the firing mechanism is in any position other than the unfired position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A surgical instrument, comprising:
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an elongate implement portion responsive to a firing motion and a closure motion; a firing mechanism operably configured to produce the firing motion between an unfired position and a fully fired position, wherein when the firing mechanism moves from the unfired position to the fired position, at least one staple is ejected from a cartridge and into tissue; a closing mechanism operably configured to close and to open the implement portion; a closing release means to clamp the implement portion in the fully closed position, and responsive to an operator command to open the implement portion when the firing mechanism is in an unfired position; and a lockout mechanism configured to lock the clamped implement portion in the fully closed position when the firing mechanism is in any position other than the unfired position.
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Specification