Patent ID: 8439877
Filing Date: 2013-05-14
Classification: A61M,Y10T

Abstract:
1. A cannula with a bi-directionally engageable crimp feature for preventing the cannula from protruding from a cannula shield once the cannula is withdrawn into the cannula shield, the cannula comprising: an elongated tubular portion having a proximal end and a distal end, the distal end comprising a sharpened distal tip; a crimp feature formed between a first and a second location on the elongated tubular portion of the cannula, the first location being distal to the second location, wherein the outside diameter of the elongated tubular portion at the first location is a first outside diameter and the outside diameter of the elongated tubular portion at the second location is a second outside diameter, the crimp feature comprising an expansion of the outside diameter of the cannula from both the first outside diameter at the first location and the second outside diameter at the second location to a maximum outside diameter at a third location on the elongated tubular portion, the third location being between the first and second locations, the maximum outside diameter being greater than the first and the second outside diameters; and a notch at least partially disposed within the crimp feature, the notch having a distal end and a proximal end, the proximal end of the notch being at a fourth location on the elongated tubular portion of the cannula, the fourth location being between the first and the third locations such that the outside diameter of the crimp feature at the fourth location is less than the maximum outside diameter at the third location but greater than the first outside diameter at the first location.