TAMPER RESITANT HINGE PIN RETENTION

摘要

A pin can be retained in a hinge or other set of workpieces by a ferrule crimped onto an annular notch near the terminus of the pin. The ferrule can have a flange that acts as a stop preventing the pin from being removed from the workpieces. With appropriate length of the ferrule and location of the notch, a particular desired degree of play can be introduced. One use of this fastener assembly can be to join two or more workpieces in a way that provides for the workpieces to pivot around the pin.

主权项

1. A hinge assembly comprising:
a first leaf and a second, complementary leaf of a butt hinge with knuckles interposed; a pin positioned through the hinge knuckles as to mutually retain the hinge leafs to each other, the pin having a head at one end and a portion at the other end extending beyond the last knuckle, the portion extending beyond the last knuckle having an annular notch; and, a ferrule with a portion non-elastically deformed into the notch; the ferrule having a flange where the flange has a diameter greater than the inside diameter of the lowermost knuckle and thereby preventing removal of the pin while the ferrule is in place and intact.