Patent ID: 7451523

Claim:
A hinge comprising: a stationary bracket having a sleeve being tubular and having a first end; a second end; and a first opening formed in the first end of the sleeve; multiple limiting notches formed in the first end of the sleeve and being adjacent to the first opening; two resilient spacers mounted securely in the sleeve; a pintle mounted rotatably in the resilient spacers and having a bar having multiple oil grooves formed around the bar; a protruding end protruding in the sleeve from the first opening; and an outer diameter; and an enlarged head being opposite to the protruding end; and a stop element mounted around the pintle between the enlarged head of the pintle and the resilient spacers and having multiple limiting tabs extending out of the stop element and corresponding to and mounted in the limiting notches in the stationary bracket; and a keyhole mounted around the pintle and having an inner diameter corresponding to the outer diameter of the bar.