Surgical stapling apparatus
First Claim
Patent Images
1. A surgical stapling apparatus comprising:
- a) a housing;
b) a movable handle supported by the housing, the movable handle being movable through an actuation stroke;
c) an elongated body extending distally from the housing and defining a longitudinal axis, the elongated body having a distal end adapted to releasably engage a disposable loading unit;
d) an actuation shaft supported at least in part within the housing, the actuation shaft being mounted for longitudinal movement within the housing in response to movement of the movable handle through the actuation stroke; and
e) a firing lockout assembly including a locking member and a plunger, the locking member being pivotably mounted at least partially within the housing and the plunger being linearly movable into operative engagement with the locking member to pivot the locking member from a first position obstructing longitudinal advancement of the actuation shaft to a second position permitting longitudinal advancement of the actuation shaft.
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Abstract
A surgical stapling apparatus particularly suited for endoscopic procedures is described. The device includes a firing lockout assembly including a linearly movable plunger which is movable into operative engagement with a locking member to move the locking member from a first position obstructing longitudinal advancement of an actuation shaft to a second position permitting longitudinal advancement of the actuation shaft.
2309 Citations
9 Claims
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1. A surgical stapling apparatus comprising:
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a) a housing; b) a movable handle supported by the housing, the movable handle being movable through an actuation stroke; c) an elongated body extending distally from the housing and defining a longitudinal axis, the elongated body having a distal end adapted to releasably engage a disposable loading unit; d) an actuation shaft supported at least in part within the housing, the actuation shaft being mounted for longitudinal movement within the housing in response to movement of the movable handle through the actuation stroke; and e) a firing lockout assembly including a locking member and a plunger, the locking member being pivotably mounted at least partially within the housing and the plunger being linearly movable into operative engagement with the locking member to pivot the locking member from a first position obstructing longitudinal advancement of the actuation shaft to a second position permitting longitudinal advancement of the actuation shaft. - View Dependent Claims (2, 3, 4, 5, 7, 8)
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6. A surgical stapling apparatus comprising:
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a) a housing; b) a movable handle supported by the housing, the movable handle being movable through an actuation stroke; c) an elongated body extending distally from the housing and defining a longitudinal axis, the elongated body having a distal end adapted to releasably engage a disposable loading unit; d) an actuation shaft supported at least in part within the housing, the actuation shaft being mounted for longitudinal movement within the housing in response to movement of the movable handle through the actuation stroke; and e) a firing lockout assembly including a locking member and a plunger, the locking member being pivotably mounted at least partially within the housing and the plunger being movable into operative engagement with the locking member to pivot the locking member from a first position obstructing longitudinal advancement of the actuation shaft to a second position permitting longitudinal advancement of the actuation shaft, wherein the plunger includes a shaft having a tapered, substantially annular, camming member formed thereon, the plunger being supported within the housing for movement in a direction substantially perpendicular to the longitudinal axis of the elongated body, a portion of the shaft extending through opposite walls of the housing, the locking member including a proximal extension having a slot configured to receive the camming member, the locking member being pivotably supported within the housing about its distal end, wherein movement of the plunger within the housing causes the camming member to abut either of opposite walls defining the slot to move the locking member from the first to the second position.
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9. A surgical stapling apparatus comprising:
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a) a housing; b) a movable handle supported by the housing, the movable handle being movable through an actuation stroke; c) an elongated body extending distally from the housing and defining a longitudinal axis, the elongated body having a distal end adapted to releasably engage a disposable loading unit; d) an actuation shaft supported at least in part within the housing, the actuation shaft being mounted for longitudinal movement within the housing from a proximal position to effect approximation of jaws of a disposable loading unit in response to movement of the movable handle through the actuation stroke; and e) a firing lockout assembly including a locking member and a plunger, the locking member being pivotably mounted at least partially within the housing and the plunger being movable into operative engagement with the locking member independent of the position of the actuation shaft to pivot the locking member from a first position obstructing longitudinal advancement of the actuation shaft to a second position permitting longitudinal advancement of the actuation shaft.
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Specification