Patent FR-2863872-A1 (FR)
Title: Disposable ophthalmic microsurgical forceps for cataract surgery, comprises gripping part molded by single part, pinching part made of metal tips inserted during molding of gripping part in distal ends of arms, and pre-centering units
IPC: A61B17/30
Filed: 2003-12-22
Abstract: The disposable ophthalmic microsurgical forceps comprises a gripping part (1) molded by a single part that is made of plastic material and consists of two arms connected each other by one of their ends to form a proximal end of the forceps, a pinching part (2) made of metal tips (2A, 2B) inserted during molding of the gripping part in distal ends of the arms to form two branches of the forceps, and pre-centering units. The distal part of the forceps is provided with centering units, which comprise a male part that is formed by a pin or finger (3). The disposable ophthalmic microsurgical forceps comprises a gripping part (1) molded by a single part that is made of plastic material and consists of two arms connected each other by one of their ends to form a proximal end of the forceps, a pinching part (2) made of metal tips (2A, 2B) inserted during molding of the gripping part in distal ends of the arms to form two branches of the forceps, and pre-centering units. The distal part of the forceps is provided with centering units, which comprise a male part that is formed by a pin or finger (3) to form cylinder that is fixed to one of arms and oriented towards the other arm and a female part constituted by a transfixing opening (4) provided in the arm with respect to the male part. The centering units are provided in the end portions of plastic arms in which the proximal portions of metallic pinching point are inserted. The centering opening transfixes or crosses the plastic part and the part of the metal tip embedded in the plastic material. The transfixing opening has an oblong shape of which a major axis is parallel to an axis of the arms provided with the opening. The pre-centering units comprise a male part consisting of a pin that is fixed to one of branches of the forceps and oriented toward the other arm, and a female part consisting of a transfixing opening. The pre-centering units are arranged away from the centering units in the direction of the proximal end of the forceps. The arrangement of male and female elements of centering units and pre-centering units on the arms of the forceps is reversed. The pin and transfixing opening of pre-centering units have: an oval shape of which a main axis is oriented perpendicular to the axes of arms provided with tenon and the opening respectively; and volumes greater than that of a pivot and a centering hole respectively. In the area of gripping or finger pressure of the arm, an inner face of the plastic arms is provided, where the trust bearings are oriented towards the inner face of the other arm. The finger and/or pre-centering pin comprise a circular shoulder at their base and the centering and/or pre-centering opening are bordered by a collar, where the shoulders and collars are contacted with each other in the pinching position to constitute the thrust bearing while joining the arms of the forceps. The thrust bearings restrict the movement of connecting arms, and are distributed over the entire length of a gripping zone of the forceps.