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 advancement assembly including an actuation shaft and a driving pawl, the actuation shaft having a toothed rack and being supported at least in part within the housing, the driving pawl being operatively associated with the movable handle and biased into engagement with the rack, wherein during the actuation stroke, the driving pawl is movable to effect longitudinal advancement of the actuation shaft; and
e) a retraction mechanism including a release plate operatively associated with the actuation shaft, the release plate being movable relative to the actuation shaft into operative engagement with the driving pawl to disengage the driving pawl from the rack.
1 Assignment
0 Petitions
Accused Products
Abstract
A surgical stapling device particularly suited for endoscopic procedures is described. The device can be used with both articulating and non-articulating disposable loading units and has a sensing mechanism for sensing the type of disposable loading unit secured to the device.
2359 Citations
9 Claims
-
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 advancement assembly including an actuation shaft and a driving pawl, the actuation shaft having a toothed rack and being supported at least in part within the housing, the driving pawl being operatively associated with the movable handle and biased into engagement with the rack, wherein during the actuation stroke, the driving pawl is movable to effect longitudinal advancement of the actuation shaft; and
e) a retraction mechanism including a release plate operatively associated with the actuation shaft, the release plate being movable relative to the actuation shaft into operative engagement with the driving pawl to disengage the driving pawl from the rack. - View Dependent Claims (2, 3, 4)
-
-
5. 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 advancement assembly including an actuation shaft, a driving pawl and a locking pawl, the actuation shaft having a toothed rack and being supported at least in part within the housing, the driving pawl being operatively associated with the movable handle and movable into engagement with the rack to effect longitudinal advancement of the actuation shaft during the actuation stroke, the locking pawl being biased into engagement with the rack to retain the actuation shaft in a longitudinally fixed position; and
e) an anti-reverse clutch mechanism including a gear assembly and a slide plate, the gear assembly being positioned to translate movement of the actuation shaft into movement of the slide plate, the slide plate having a cam surface and being movable, in response to longitudinal advancement of the actuation shaft, from a first position in which the cam surface engages the locking pawl to urge the locking pawl out of engagement with the rack to a second position in which the cam surface is spaced from the locking pawl. - View Dependent Claims (6, 7, 8, 9)
-
Specification