Patent ID: 8024839

Claim:
An electronic equipment enclosure installation, comprising (a) an electronic equipment enclosure, including a first structure and a second structure, at least one of which is a door structure against which air is directed, and (b) an indexing hinge rotatably supporting the door structure, comprising: (i) a two arm hinge half, including two hinge arms, a projecting indexing element disposed therebetween, and a first mounting element adapted to mount and connect the two arm hinge half to the first structure of the electronic equipment enclosure; and (ii) an axle hinge half, including two axles, each extending from a toothed indexing element, and a second mounting element adapted to mount and connect the axle hinge half to the second structure of the electronic equipment enclosure; (iii) wherein when the axle hinge half is connected to the two arm hinge half by interconnecting each axle with a respective hinge arm, the projecting indexing element abuts the toothed indexing element in such a way as to prevent rotation of the door structure, when air is directed against the door structure, unless an additional rotational torque is applied; (c) wherein the door structure may be selectively positioned to control the flow of air in the electronic equipment enclosure; and (d) wherein the door structure and the indexing hinge are both entirely disposed within an interior of the electronic equipment enclosure.