Elongated-member-driving apparatus – Surgical stapler – With lockout
Reexamination Certificate
2006-12-05
2006-12-05
Sipos, John (Department: 3721)
Elongated-member-driving apparatus
Surgical stapler
With lockout
C227S175100, C227S182100, C227S019000
Reexamination Certificate
active
07143925
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. The handle produces multiple firing strokes 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. One or more electrically activated lockout mechanisms, such as electroactive polymer (EAP) actuators, are biased to prevent firing unless activated. One lockout is a spring-biased side pawl firing mechanism enabled by an EAP block actuator. Another is a firing trigger EAP lock. Yet another is a closure yoke EAP lock. Yet a further one is a manual retraction EAP lock that locks the firing mechanism. Thereby, various sensed or commanded inputs may be incorporated to prevent inadvertent firing.
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Shelton, IV Frederick E.
Timperman Eugene L.
Ethicon Endo-Surgery Inc.
Lopez Michelle
Sipos John
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