Patent ID: 7967181
Filing Date: 2011-06-28
Classification: A61B,Y10T

Abstract:
1. A rotary cutting system for use with a surgical stapling device comprising: a knife blade having a distal cutting edge and a proximal base; a support base positioned within a surgical stapling device; a mainspring for imparting a motion to the knife blade relative to the support base; and a releasable latch mechanism engagable with the knife blade to releasably restrain the knife blade against the bias of the mainspring, wherein a first end of the mainspring is attached to the support base and a second end of the mainspring is engageable with the knife blade, and the mainspring is a length of material spiral coiled upon itself and expandable from a wound condition storing energy to an expanded condition releasing energy such that the mainspring imparts rotary motion to the knife blade relative to the support base as the mainspring moves from the wound condition to the expanded condition.