Patent ID: 6015413
Filing Date: 2000-01-18
Classification: A61B

Abstract:
Device for extracting screwthreaded wires for osteosynthesis, comprising at least two lever pieces (20-21, 120-121, 220-221) hinged together and having at one longitudinal end thereof (20a-21a, 120a-121a, 220a-221a) seats or jaws (22-23, 122-123, 222-223) for grasping the end of a wire (19) which is required to be extracted, and manually operable clamp means acting on the other end (20b-21b, 120b-121b, 220b-221b) of said lever pieces to promote opening or closing thereof to thereby generate at least one gripping couple on the end of the wire, and characterized in that said clamp means are provided with means (24-25, 128-129, 224-230) for preventing relaxation of the grip on the end of the wire to be extracted, and said seats are provided with means (21-23, 122-123, 222-223) for gripping the end of the wire, said relaxation-preventing means (24-25, 128-129, 224-230) including at least a threaded pin (24a, 124, 224) mounted at one end of one of the lever pieces for selectively locking the end of the other lever piece, said gripping means (22-23, 122-123, 222-223) having semicylindrical cavities whose diameter is approximately equal to the diameter of the wire to be extracted and whose longitudinal axis is coaxial with the longitudinal axis of the device, and having a first cylindrical end part (20a-21a, 120a-121a, 220a-221a) whose diameter is slightly greater than the diameter of the wire to be extracted and a second, generally frustoconical part joining said first part and a generally cylindrical central part of the two lever pieces thereby to enable the wire to be gripped beneath the surface of the skin.