Patent ID: 8305747

Claim:
A rotary hinge comprising: a receiving assembly having a receiving panel having a first pivoting hole being circular and formed therethrough; a connecting assembly connected pivotally to the receiving assembly and comprising a connecting panel attached respectively to the receiving panel and having a second pivoting hole being non-circular, formed therethrough and aligning with the first pivoting hole; an additional panel having a third pivoting hole being non-circular, formed therethrough and aligning with the first and second pivoting holes, the additional panel and the connecting panel being attached respectively to two opposite sides of the receiving panel; and a pintle being non-circular in cross section and keyed with the second and third pivoting holes, mounted securely through the connecting panel, mounted rotatably through the receiving panel and mounted securely through the additional panel; and a retaining assembly connected to the receiving assembly and the connecting assembly and providing resilient force to selectively hold the receiving assembly and the connecting assembly at two relative positions.