Surgical stapler with tiltable anvil assembly
First Claim
Patent Images
1. A tiltable anvil assembly comprising:
- a center rod;
a head assembly including a housing, a post, an anvil plate having staple deforming pockets, and a backup member, the head assembly being pivotally secured to the center rod and pivotal in relation to the center rod between an operative position and a tilted position, wherein the backup member is movable about the post from a first position in which a portion of the backup member is positioned to prevent movement of the head assembly from the operative position to the tilted position, to a second position in which the backup member is positioned to permit movement of the head assembly in relation to the center rod from the operative position to the tilted position, and further including a retainer member positioned in the head assembly to prevent movement of the backup member from the first position to the second position until a predetermined force has been applied to the backup member, wherein the retainer member includes a plurality of deformable tabs positioned to engage the backup member and deform in response to the predetermined force applied to the backup member.
2 Assignments
0 Petitions
Accused Products
Abstract
A surgical stapling device comprises a tiltable anvil assembly. The anvil assembly includes a center rod and a head assembly which is pivotally secured center rod. The head assembly includes a housing, a post, an anvil plate and a backup member. The backup member is movably positioned about the post from a first position preventing pivotal movement of the head assembly to a second position permitting pivotal movement of the head assembly. A retainer member is positioned between the backup member and the housing to prevent movement of the backup member from its first position to its second position until a predetermined force has been applied to the backup member.
445 Citations
18 Claims
-
1. A tiltable anvil assembly comprising:
-
a center rod; a head assembly including a housing, a post, an anvil plate having staple deforming pockets, and a backup member, the head assembly being pivotally secured to the center rod and pivotal in relation to the center rod between an operative position and a tilted position, wherein the backup member is movable about the post from a first position in which a portion of the backup member is positioned to prevent movement of the head assembly from the operative position to the tilted position, to a second position in which the backup member is positioned to permit movement of the head assembly in relation to the center rod from the operative position to the tilted position, and further including a retainer member positioned in the head assembly to prevent movement of the backup member from the first position to the second position until a predetermined force has been applied to the backup member, wherein the retainer member includes a plurality of deformable tabs positioned to engage the backup member and deform in response to the predetermined force applied to the backup member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A surgical stapling assembly comprising:
-
a handle assembly; an elongated body portion; and a distal head portion including a shell assembly supporting a plurality of staples and a tillable anvil assembly, the tiltable anvil assembly having a center rod and a head assembly pivotal with respect to the center rod from an operative position to a tilted position, the head assembly including a housing, a post, an anvil plate and a backup member, wherein the backup member is movable about the post from a first position preventing pivotal movement of the head assembly from the operative position to the tilted position to a second position permitting movement of the head assembly from the operative position to the tilted position, and a retainer member supported on the head assembly at a position to prevent movement of the backup member from its first position to its second position until a predetermined force has been applied to the backup member, wherein the retainer member includes a plurality of deformable tabs deformable by movement of the backup member in response to the predetermined force, applied to the backup member. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
Specification