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US 12,004,739 B2Granted
Reload assembly with knife carrier lockout
AssigneeCovidien LP
InventorsDavid Valentine, Joseph Eisinger, Ramiro Cabrera, Patrick Mozdzierz, Christopher Penna, Justin Williams
Life of this patent
Estimating the term…
Abstract
A surgical stapling device includes a reload assembly that includes a locking member to retain a knife carrier of the reload assembly in a retracted position after the stapling device is fired. The locking member may be supported on an inner housing portion of the shell housing or on a staple pusher assembly of the reload assembly.
Claims20
A surgical stapling device comprising:
- an adaptor assembly having a proximal end portion and a distal end portion;
- and
- a reload assembly supported on the distal end portion of the adaptor assembly, the reload assembly including:
- a shell housing including an outer housing portion and an inner housing portion;
- a staple cartridge supporting staples;
- a staple pusher supported movable from a retracted position to an advanced position to eject the staples from the staple cartridge;
- a staple actuator positioned to engage the staple pusher, the staple actuator having a stop surface and movable from an actuator retracted position to an actuator advanced position to move the staple pusher from a pusher retracted position to a pusher advanced position to eject the staples from the staple cartridge, the staple actuator and the staple pusher defining a through bore;
- a knife carrier supported within the through bore and movable between a carrier retracted position and a carrier advanced position, the knife carrier defining a longitudinal axis and supporting a locking member that is formed from a resilient material, the locking member aligned with the stop surface of the staple actuator when the staple actuator is in the actuator advanced position and the knife carrier is in the carrier retracted position to prevent readvancement of the knife carrier;
- and
- a knife supported on the knife carrier.
7 more elements
A reload assembly comprising:
- a shell housing including an outer housing portion and an inner housing portion;
- a staple cartridge supporting staples;
- a staple pusher supported within the shell housing and movable from a retracted position to an advanced position to eject the staples from the staple cartridge;
- a staple actuator supported within the shell housing and positioned to engage the staple pusher, the staple actuator having a stop surface and movable from an actuator retracted position to an actuator advanced position to move the staple pusher from a pusher retracted position to a pusher advanced position to eject the staples from the staple cartridge, the staple actuator and the staple pusher defining a through bore;
- a knife carrier supported within the through bore and movable between a carrier retracted position and a carrier advanced position, the knife carrier defining a longitudinal axis and supporting a locking member formed of a resilient material, the locking member aligned with the stop surface on the staple actuator when the staple actuator is in the actuator advanced position and the knife carrier is in the carrier retracted position to prevent readvancement of the knife carrier;
- and
- a knife supported on the knife carrier.
4 more elements
A reload assembly comprising:
- a shell housing;
- an annular staple cartridge supporting staples;
- a staple actuator supported within the shell housing, the staple actuator having a stop surface and movable from an actuator retracted position to an actuator advanced position to eject the staples from the staple cartridge, the staple actuator defining a through bore;
- a knife carrier supported within the through bore and movable between a carrier retracted position and a carrier advanced position, the knife carrier defining a longitudinal axis and supporting a resilient locking member, the resilient locking member aligned with the stop surface on the staple actuator when the staple actuator is in the actuator advanced position and the knife carrier is in the carrier retracted position to prevent readvancement of the knife carrier;
- and
- a knife supported on the knife carrier.
3 more elements
Dependencies are inferred from the claim text.