Patent ID: 6163929
Filing Date: 2000-12-26
Classification: E05D,E05Y,Y10T

Abstract:
A hinge resistive to unauthorized tampering, the hinge having a first hinge leaf hingedly connected to a second hinge leaf for movement about a hinge axis, the hinge leaves being inter-engaged to prevent axial separation along the hinge axis, and at least one hinge pin extending along the hinge axis, the hinge pin having a terminal axial end face located internally of one of the hinge leafs, comprising:the first hinge leaf including a first journal arm and the second hinge leaf including a pair of second journal arms spaced apart along the hinge axis, said first journal arm being located between said pair of second journal arms in order to prevent axial separation between the first and second hinge leaves, the first and second journal arms having bores aligned along the hinge axis and receiving said at least one hinge pin;the bore extending through one of said second journal arms being stepped to define a wide bore portion and a shoulder, the wide bore portion being of a predetermined length defined between said shoulder and an external mouth of the bore, said bores containing said at least one hinge pin having a shank portion and an enlarged head portion, the enlarged head portion being located within the wide bore portion and co-operating with said shoulder to prevent axial displacement of said at least one hinge pin in the insertion direction of the hinge pin, said bore being closed to prevent access to said terminal axial end face of said at least one hinge pin;the bore extending through each of said second journal arms being stepped to define a wide bore portion and a shoulder, the wide bore portion of each of said bores being of a predetermined axial length defined between said shoulder and the external mouth of the bore;said at least one hinge pin comprising a first hinge pin having an enlarged head portion and a shank portion located within the bore of one of said second journal arms, and a second hinge pin having an enlarged head portion and a shank portion located within the bore of the other of said second journal arms;the enlarged head portions of the first and second hinge pins being resistive to drilling and being located within the wide bore portions of the bores of the respective second journals and co-operating with the respective shoulders to prevent axial displacement of the hinge pin in the hinge pin insertion direction; andeach shank portion of the respective hinge pins extending partially into the bore of the first journal arm.