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US 2026/0248502 A1Published application
Powered Surgical Device With Switch to Control Automatic Retraction
AssigneeCovidien LP
InventorChirong LIU
Life of this patent
Estimating the term…
Abstract
A powered surgical device includes a handle assembly (12, 312, 512) having a rack (56, 356, 556), a first switch (62) for initiating clamping and firing of the surgical device, and a second switch (68, 368, 568) for initiating automatic retraction of the rack (56, 356, 556). The second switch (68, 368, 568) is controlled by a switch control mechanism (80, 380, 580) that is engaged with the rack (56, 356, 556) in the handle assembly (12, 312, 512) to initiate automatic retraction of the rack (56, 356, 556) when firing is completed.
Claims20
A powered handle assembly comprising:
- an outer housing defining a cavity;
- an inner housing secured within the cavity, the inner housing defining a longitudinally extending path through the inner housing;
- a rack positioned along the longitudinally extending path of the inner housing, the rack including a first engagement surface and movable between retracted and advanced positions;
- a drive assembly supported by the inner housing, the drive assembly engaged with the rack and operable to move the rack between the retracted and advanced positions;
- a first switch supported within the cavity and coupled to the drive assembly, the first switch manually movable from an open position to a closed position;
- an automatic retraction switch supported within the cavity, the automatic retraction switch coupled to the drive assembly and movable between open and closed positions;
- and
- an automatic retraction switch control mechanism including an actuator supported on the inner housing adjacent the automatic retraction switch, the actuator movable from a first position to a second position in response to movement of the rack from the retracted position to the advanced position to move the automatic retraction switch from the open position to the closed position;
- wherein the first switch and the automatic retraction switch are configured such that when the first switch is in the closed position and the automatic retraction switch is in the open position, the drive assembly is actuated to move the rack towards the advanced position, and when the first switch is in the closed position and the automatic retraction switch is in the closed position, the drive assembly is actuated to move the rack towards the retracted position.
6 more elements
A surgical device comprising:
- an elongate body having a proximal portion and a distal portion;
- a tool assembly supported on the distal portion of the elongate body, the tool assembly including a first jaw and a second jaw, the first and second jaws being movable between unclamped and clamped positions;
- and
- a powered handle assembly secured to the proximal portion of the elongate body, the powered handle assembly including:
- an outer housing defining a cavity;
- an inner housing secured within the cavity, the inner housing defining a longitudinally extending path through the inner housing;
- a rack positioned along the longitudinally extending path of the inner housing, the rack including a first engagement surface and movable between retracted and advanced positions;
- a drive assembly supported by the inner housing, the motor gear/assembly engaged with the rack and operable to move the rack between the retracted and advanced positions;
- a first switch supported within the cavity and coupled to the drive assembly, the first switch manually movable from an open position to a closed position;
- an automatic retraction switch supported within the cavity, the automatic retraction switch coupled to the drive assembly and movable between open and closed positions;
- and
- an automatic retraction switch control mechanism including an actuator supported on the inner housing adjacent the automatic retraction switch, the actuator movable from a first position to a second position in response to movement of the rack from the retracted position to the advanced position to move the automatic retraction switch from the open position to the closed position;
- wherein the first switch and the automatic retraction switch are configured such that when the first switch is in the closed position and the automatic retraction switch is in the open position, the drive assembly is actuated to move the rack towards the advanced position, and when the first switch is in the closed position and the automatic retraction switch is in the closed position, the drive assembly is actuated to move the rack towards the retracted position.
10 more elements
A powered handle assembly comprising:
- an outer housing defining a cavity;
- an inner housing secured within the cavity, the inner housing defining a longitudinally extending path through the inner housing;
- a rack positioned along the longitudinally extending path of the inner housing, the rack including a first engagement surface and movable between retracted and advanced positions;
- a drive assembly supported by the inner housing, the drive assembly engaged with the rack and operable to move the rack between the retracted and advanced positions;
- a first switch supported within the cavity and coupled to the drive assembly, the first switch manually movable from an open position to a closed position;
- an automatic retraction switch supported within the cavity, the automatic retraction switch coupled to the drive assembly and movable between open and closed positions;
- an automatic retraction switch control mechanism including an actuator supported on the inner housing adjacent the automatic retraction switch, the actuator movable from a first position to a second position in response to movement of the rack from the retracted position to the advanced position to move the automatic retraction switch from the open position to the closed position;
- and
- a retraction button supported on the housing, the retraction button engaged with the actuator and movable to move the actuator from the first position to the second position to cause retraction of the rack prior to movement of the rack to the advanced position;
- wherein the first switch and the automatic retraction switch are configured such that when the first switch is in the closed position and the automatic retraction switch is in the open position, the drive assembly is actuated to move the rack towards the advanced position, and when the first switch is in the closed position and the automatic retract switch is in the closed position, the drive assembly is actuated to move the rack towards the retracted position.
7 more elements
Dependencies are inferred from the claim text.