Collapsible frame for a portable shelter

Abstract

In a portable shelter frame, a frame support is selectively articulable between an erected state and a collapsed state. The frame support includes a central frame member; a pair of upper arcuate frame members rotatably coupled to the ends of the central frame member, each pair of frame upper frame members being selectively moveable between a first, fixed position when the frame support is in the erected state and a second, fixed position when the frame support is in the collapsed state; and a pair of lower arcuate frame members rotatably coupled to the other ends of the upper arcuate frame members, each pair of frame lower frame members being selectively moveable between a first, fixed position when the frame support is in the erected state and a second, fixed position when the frame support is in the collapsed state. A frame assembly may include two more of the frame supports, purlin assemblies interconnecting the frame supports, respectively, each purlin assembly including first and second purlin members rotatably coupled about a purlin mid-joint, a first end of the purlin assembly being pivotally coupled to one of the frame supports, and a second end of the purlin assembly being pivotally coupled to another frame support, the purlin assembly being selectively lockable in an extended position when the frame is in the erected state, the purlin members being rotatable to a folded position when the frame is in the collapsed state.

Dependencies are inferred from the claim text.