Patent ID: 7758501
Filing Date: 2010-07-20
Classification: A61B

Abstract:
1. A refractor comprising: a first blade assembly defining a first housing having a top surface, a bottom surface, a first side surface connecting the top surface and the bottom surface, and a second side surface connecting the top surface and the bottom surface, the first side surface intersecting and oriented perpendicular to the second side surface, the first housing having a first opening between the top surface and the bottom surface and second opening between the top surface and the bottom surface and spaced apart from the first opening, the first opening opposite the first side surface and the second opening opposite the second side surface, the first blade assembly having a first blade having a proximal end and a distal end, the proximal end of the first blade including a rotation opening, the proximal end of the first blade including the rotation opening positioned within the first housing, the first blade extending through the first opening in the first housing such that the distal end of the first blade is positioned outside of the first housing, the first blade assembly including a second blade having a proximal end and a distal end, the proximal end of the second blade including a rotation opening, the proximal end of the second blade including the rotation opening positioned within the first housing, the second blade extending through the second opening in the first housing such that the distal end of the second blade is positioned outside of the first housing; and a second blade assembly defining a second housing having a top surface, a bottom surface, a first side surface connecting the top surface and the bottom surface, and a second side surface connecting the top surface and the bottom surface, the first side surface intersecting and oriented perpendicular to the second side surface, the second housing having a first opening between the top surface and the bottom surface and second opening between the top surface and the bottom surface spaced apart from the first opening, the first opening opposite the first side surface and the second opening opposite the second side surface, the second blade assembly having a third blade having a proximal end and a distal end, the proximal end of the third blade including a rotation opening, the proximal end of the third blade including the rotation opening positioned within the second housing, the third blade extending through the first opening in the second housing such that the distal end of the third blade is positioned outside of the second housing, the second blade assembly including a fourth blade having a proximal end and a distal end, the proximal end of the fourth blade including a rotation opening, the proximal end of the fourth blade including the rotation opening positioned within the second housing, the fourth blade extending through the second opening in the second housing such that the distal end of the fourth blade is positioned outside of the second housing connected thereto, a first rack connecting the first blade assembly and the second blade assembly, a first end of the first rack positioned in the first housing and a second end of the first rack positioned in the second housing, at least one of the first blade assembly and the second blade assembly being movable along the first rack, a second rack connecting the first blade assembly and the second blade assembly, a first end of the second rack positioned in the first housing and a second end of the second rack positioned in the second housing, at least one of the first blade assembly and the second blade assembly being movable along the second rack, the retractor being adjustable between a closed configuration in which the first blade assembly and second blade assembly are proximate one another at least the proximal end thereof and an expanded configuration in which the first blade assembly and the second blade assembly are displaced from another and wherein the first rack extends through the rotation opening of the first blade, the first blade being rotatable about the first rack, and the second rack extends through the rotation opening of the third blade, the third blade being rotatable about the second rack.