Surgical stapler apparatus
First Claim
1. In a surgical stapler apparatus the combination comprisinga housing;
- a shaft movably mounted in said housing for relative longitudinal movement therein;
an anvil mounted on a distal end of said shaft;
an annular stapler pusher projecting axially from a distal end of said housing towards said anvil;
means for mounting an annular stapling cartridge on said housing in alignment with said pusher, said means including a sleeve slidably mounted on said housing for movement between an extended position and retracted position;
means for moving said shaft into said housing and said anvil towards said knife; and
cam means between said housing and said sleeve for securing said sleeve relative to said housing during proximal movement of said anvil to a predetermined point relative to said housing, said cam means being positioned relative to said sleeve for movement relative to said housing in response to continued proximal movement of said anvil from said point whereby said anvil pushes said annular means relative to said pusher to expel staples from a stapling cartridge thereon for stapling of tissue between said anvil and a cartridge on said housing.
1 Assignment
0 Petitions
Accused Products
Abstract
The end-to-end anastomosis surgical stapling apparatus is actuated in a single step. The apparatus includes a shaft which is able to pull the stapling anvil proximally in one step relative to a stationary housing as well as a plurality of circumferentially disposed balls mounted in cage-like manner in the housing which serve to lock the sleeve relative to the housing. The sleeve carries the staple cartridge and is released to move with the anvil when the anvil clamps the tissue against the cartridge. Thereafter, cam surfaces on the shaft and the sleeve permit the balls to move radially inwardly releasing the sleeve for proximal movement relative to the housing so that the staples pierce the tissue for stapling purposes.
324 Citations
29 Claims
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1. In a surgical stapler apparatus the combination comprising
a housing; -
a shaft movably mounted in said housing for relative longitudinal movement therein; an anvil mounted on a distal end of said shaft; an annular stapler pusher projecting axially from a distal end of said housing towards said anvil; means for mounting an annular stapling cartridge on said housing in alignment with said pusher, said means including a sleeve slidably mounted on said housing for movement between an extended position and retracted position; means for moving said shaft into said housing and said anvil towards said knife; and cam means between said housing and said sleeve for securing said sleeve relative to said housing during proximal movement of said anvil to a predetermined point relative to said housing, said cam means being positioned relative to said sleeve for movement relative to said housing in response to continued proximal movement of said anvil from said point whereby said anvil pushes said annular means relative to said pusher to expel staples from a stapling cartridge thereon for stapling of tissue between said anvil and a cartridge on said housing. - View Dependent Claims (2, 3, 4, 5)
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6. A flexible surgical stapler apparatus comprising
a housing; -
a non-rotatable shaft slidably mounted in said housing; a flexible axially rigid tube abutting said housing; a cable within said tube and secured to said shaft for moving said shaft relative to said housing; an anvil mounted on a distal end of said shaft; an annular knife projecting from a distal end of said housing towards said anvil; an annular staple pusher projecting from said distal end of said housing towards said anvil; an annular stapling cartridge having a plurality of staples mounted in alignment with said pusher for stapling tissue disposed between said anvil and said cartridge; a mounting ring concentric to and about said pusher mounting said cartridge thereon, said ring being movable between an extended position and a retracted position; and means for securing said ring relative to said housing during movement of said anvil to a predetermined point spaced from said knife and for releasing said ring from securement with said housing in response to continued movement of said anvil towards said knife whereby said anvil pushes the tissue and said cartridge towards said pusher to expel said staples from said cartridge while pushing said staples through the tissue and against said anvil for clinching thereof. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A surgical stapler apparatus comprising
a housing; -
a shaft movably mounted in said housing for relative longitudinal movement therein, said shaft having a cam surface at an intermediate location within said housing; an anvil mounted on a distal end of said shaft; an annular knife projecting axially from a distal end of said housing towards said anvil; an annular staple pusher projecting axially from said end of said housing towards said anvil and radially outside said knife; annular means for mounting an annular stapling cartridge having a plurality of staples on said housing in alignment with said pusher, said means including a sleeve slidably mounted on said housing for movement between an extended position and retracted position; means for moving said shaft into said housing and said anvil towards said knife; and cam means for securing said sleeve relative to said housing during movement of said anvil to a predetermined point spaced from said knife, said cam means being positioned relative to said cam surface and said sleeve for movement relative to said housing in response to continued proximal movement of said anvil towards said knife from said point whereby said anvil pushes said annular means relative to said pusher to expel staples from a stapling cartridge thereon for stapling of tissue between said anvil and a cartridge on said annular means. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification