Staple drive assembly

Details Staple drive assembly Staple drive assembly

2011-01-11

2011-01-11

Nash, Brian D (Department: 3721)

Elongated-member-driving apparatus

Surgical stapler

With magazine

C227S019000, C227S175100

Reexamination Certificate

active

07866528

ABSTRACT:
A staple drive assembly includes an actuation sled and at least one staple pusher. The staple drive assembly is adapted to fit within a staple cartridge having a plurality of staples and a corresponding number of retention slots. The at least one staple pusher includes at least one pusher plate for releasably engaging a backspan of a staple. The staple pusher may include a plurality of pusher plates that may be laterally and longitudinally spaced apart. An actuation member has at least one angled camming surface for engaging a complimentary angled surface of the at least one staple pusher. Camming engagement between the actuation member and the at least one staple pusher causes vertical movement of the at least one staple pusher. Lateral and longitudinal offset of the actuation member camming surfaces and the corresponding staple pusher following surfaces improves stability and control of the staple pusher during firing.

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European Search Report for EP 08252860.5-2310 date of completion is Feb. 4, 2009 (3 pages).

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