主权项 |
1. A hub for a canopy support structure, comprising:
a first disc having a first mating surface; and a second disc having a second mating surface, wherein the first mating surface and the second mating surface abut to form a first plurality of cavities; wherein each of the first plurality of cavities is associated with at least one recess formed by the abutment of the first mating surface and the second mating surface, wherein each of the at least one recess is configured to receive a pin extending from an end of one of a plurality of articulating arms, and wherein at least one of the first plurality of cavities is configured for use in a first application supported by the hub but not a second application supported by the hub; and at least one removable cavity plug associated with the at least one of the first plurality of cavities, wherein each of the at least one removable cavity plug is insertable into a corresponding one of the first plurality of cavities; wherein the first disc has a third mating surface opposite the first mating surface and the second disc has a fourth mating surface opposite the second mating surface; and a third disc having a fifth mating surface mated to the third mating surface; a fourth disc having a sixth mating surface mated to the fourth mating surface, wherein each of the first disc, the second disc, the third disc, and the fourth disc has a central pole-receiving cavity that, together, are adapted to receive a canopy support pole, and wherein the third mating surface and the fifth mating surface abut to form a second plurality of cavities; and at least one of a first plurality of wheels on axels or a first plurality of roller bearings trapped in the second plurality of cavities. |