Patent ID: 7322935

Claim:
A surgical instrument, comprising: a) a shaft having a proximal end and a distal end; b) a push rod having a proximal end and a distal end and extending substantially parallel to said shaft; c) actuation means coupled to said proximal end of said shaft and said proximal end of said push rod for moving said push rod relative to said shaft; and d) a multi-segment canopy coupled to said distal end of said shaft and said distal end of said push rod, wherein movement of said push rod in a first direction causes said multi-segment canopy to move from a substantially cylindrical configuration wherein segments of the canopy are arranged to form a circle to a substantially planar configuration wherein the segments are spread out to form a substantially continuous substantially planar surface, and movement of said push rod in a second direction opposite said first direction causes said multi-segment canopy to move from said substantially continuous substantially planar surface to said substantially cylindrical configuration.