| US 7,549,433 B2 | ||
| Vertically stacked collapsible structures | ||
| Yu Zheng, Covina, Calif. (US) | ||
| Assigned to Patent Catergory Corp., Walnut, Calif. (US) | ||
| Filed on Aug. 01, 2005, as Appl. No. 11/194,160. | ||
| Application 11/194160 is a continuation of application No. 10/294519, filed on Nov. 13, 2002, granted, now 6,926,020. | ||
| Application 10/294519 is a continuation of application No. 09/607036, filed on Jun. 29, 2000, granted, now 6,481,451. | ||
| Application 09/607036 is a continuation of application No. 09/207183, filed on Dec. 09, 1998, granted, now 6,082,386. | ||
| Prior Publication US 2005/0263175 A1, Dec. 01, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. E04H 15/40 (2006.01); A63B 63/08 (2006.01) | ||
| U.S. Cl. 135—126 [135/128; 135/95; 446/487; 473/471; 473/479; 273/407] | 6 Claims |
| 1. A collapsible structure, comprising:
a set of at least three lower panels, each lower panel having a foldable frame member having a folded and an unfolded orientation,
with a fabric material covering portions of the frame member to form the lower panel, each lower panel further including a
top side, a bottom side, a left side and a right side, with the left side of each lower panel coupled to the right side of
an adjacent lower panel to form a ring of lower panels that enclose an interior space;
a set of at least three upper panels, each upper panel having a foldable frame member having a folded and an unfolded orientation,
with a fabric material covering portions of the frame member of the upper panel to form the respective upper panel, each upper
panel further including a bottom side, a left side and a right side, with the left side of each upper panel coupled to the
right side of an adjacent upper panel to form a ring of upper panels that enclose an interior space;
wherein the bottom side of each upper panel is coupled to the top side of a corresponding lower panel, with the bottom side
of each lower panel supported on a surface; and
wherein each panel is twisted and folded to form a plurality of concentric rings when in its folded orientation.
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