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...http://www.google.com.tw/patents/US7997469?utm_source=gb-gplus-share專利 US7997469 - Staple drive assembly
