Surgical instrument with replaceable loading unit
First Claim
Patent Images
1. A surgical instrument comprising:
- an elongated body having a proximal end, a distal end, and a rod extending therethrough;
a loading unit removably mountable on the elongated body and having a tool assembly;
a sensor mechanism arranged for engagement by the loading unit and movement with the loading unit upon mounting of the loading unit on the elongated body, the sensor mechanism having a sensor tube configured to rotate along with the loading unit when the loading unit is mounted on the elongated body; and
a handle assembly including a locking structure having a release flange, the locking structure having a first position for blocking movement of the sensor mechanism and a second position for allowing movement of the sensor mechanism so that the loading unit is removable from the elongated body when the sensor mechanism is in the second position, wherein the locking structure is configured to inhibit rotation of the sensor tube when located in the first position and the release flange rotates relative to the handle assembly and remains axially stationary with respect to the elongated body in response to translation of the locking structure between the first and second positions.
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Abstract
A surgical stapling device has an elongated body and a removable loading unit and a securing structure for securing the loading unit onto the elongated body. Guiding ramps guide the movement of the loading unit as it is mounted onto the elongated body. A movable yoke secures the loading unit onto the elongated body. A sensor mechanism is engaged by the loading unit and moves with the securing structure. The locking structure has a first position for blocking movement of the sensor mechanism and preventing removal of the loading unit. The locking unit has a second position for allowing the loading unit to be removed from the device.
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Citations
16 Claims
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1. A surgical instrument comprising:
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an elongated body having a proximal end, a distal end, and a rod extending therethrough; a loading unit removably mountable on the elongated body and having a tool assembly; a sensor mechanism arranged for engagement by the loading unit and movement with the loading unit upon mounting of the loading unit on the elongated body, the sensor mechanism having a sensor tube configured to rotate along with the loading unit when the loading unit is mounted on the elongated body; and a handle assembly including a locking structure having a release flange, the locking structure having a first position for blocking movement of the sensor mechanism and a second position for allowing movement of the sensor mechanism so that the loading unit is removable from the elongated body when the sensor mechanism is in the second position, wherein the locking structure is configured to inhibit rotation of the sensor tube when located in the first position and the release flange rotates relative to the handle assembly and remains axially stationary with respect to the elongated body in response to translation of the locking structure between the first and second positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A surgical instrument comprising:
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an elongated body having a proximal end, a distal end, and a rod extending therethrough; a loading unit removably mountable on the elongated body and having a tool assembly; a sensor mechanism arranged for engagement by the loading unit, the sensor mechanism having a sensor tube that rotates with the loading unit coaxially with a longitudinal axis of the elongated body relative to the elongated body in order to releasably lock the loading unit on the elongated body in response to mounting the loading unit thereon; and a handle assembly including a locking structure having a first position for blocking movement of the sensor mechanism and a second position for allowing movement of the sensor mechanism so that the loading unit is removable from the elongated body when the sensor mechanism is in the second position, wherein the locking structure is configured to inhibit rotation of the sensor tube when in the first position. - View Dependent Claims (15, 16)
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Specification