Patent ID: 7500288

Claim:
A hinge, comprising: a barrel having a through hole; an inner surface having a keyway formed longitudinally in the inner surface; a proximal end; a distal end; and a leaf being mounted on the distal end and having a central hole aligning coaxially with the through hole in the barrel; a positioning sleeve being resilient, being mounted in the through hole in the barrel and having an inner surface; a proximal end; a distal end; two keys protruding respectively from the proximal end and the distal end and being mounted in the keyway in the barrel; a stepped expansion slot formed through the positioning sleeve to allow the positioning sleeve to contract and expand; and at least one flat surface being formed opposite to the expansion slot on the inner surface; a combination leaf-pivot pin having a proximal end; a distal end; a leaf being formed at the distal end of the combination leaf-pivot pin, extending longitudinally from the proximal end of the barrel and having a proximal end; a pivot pin being formed at the proximal end of the combination leaf-pivot pin and protruding longitudinally from the leaf at the proximal end thereof, being mounted rotatably in the barrel and having a positioning ring being formed on the pivot pin, being mounted rotatably in the positioning sleeve and having a distal end; an outer surface; and two flat surfaces being formed opposite to each other on the outer surface of the positioning ring and selectively corresponding to the at least one flat surface in the positioning sleeve; a connecting shaft being non-circular, being formed on and protruding coaxially from the distal end of the positioning ring and extending through the central hole in the leaf of the barrel; and a fastener being cylindrical, being mounted rotatably in the central hole in the leaf of the barrel, connecting to the connecting shaft and holding the combination leaf-pivot pin in the barrel.