Patent ID: 8187293
Filing Date: 2012-05-29
Classification: A61B,A61F

Abstract:
1. A microsurgical instrument, comprising: a cutting member having: a base having an actuating mechanism for reciprocating actuation of said inner cutting member so that said inner cutting member opens and closes said port and cuts tissue disposed in said port, said actuating mechanism comprising: whereby upon actuation of said inner cutting member via a pressure differential across said flexible diaphragm created using said first pneumatic port and said second pneumatic port, said rigid distal limiting surface contacts said distal wall portion when said third cutting surface is disposed proximate said distal cutting surface at an end of a cutting stroke in which said inner cutting member is moving in a distal direction, and said rigid proximal limiting surface contacts said proximal wall portion when said third cutting surface is disposed proximate said proximal cutting surface at an end of a return stroke in which said inner cutting member is moving in a proximal direction.