Patent ID: 8894574

Claim:
A tissue retractor device for retracting tissue, said device comprising: a base; a plurality of blades connected to and distributed around said base, each of said blades being outwardly movable from the base, each of the blades including a respective straight portion that extends directly into a sloped portion on an interior region of the blades, wherein the straight portion of the plurality of blades forms a cylindrical interior region; and a pusher engaged to said base, wherein an outer surface of the pusher is substantially parallel to and directly abuts the cylindrical interior region when the blades are in a closed position, wherein a portion of said pusher directly abutting said sloped portion of each of the blades when the pusher moves the blades from the closed position to an open position, wherein the straight portion extending directly into the sloped portion on the interior region of the blades guides the pusher during movement from the straight portion to the sloped portion; wherein movement of said pusher in a longitudinal direction engages said portion of said pusher against said sloped portion of each of the blades to move said blades and angularly displace the blades between the respective closed position and the open position; wherein each of the blades further comprises: a first portion extending from the base substantially parallel with an outer surface of the pusher when the blades are in a closed position; and the sloped portion extending from the first portion having a slope with respect to the outer surface of the pusher; wherein a second portion of said each of the blades is sloped greater than the sloped portion.