Protostar, Inc.

Haibin Wu

Yichuan Pan

Peter James Fellingham

Craig Timothy Shugert

The disclosure demonstrates a collapsible wheeled walker having two side frames supported above a walking surface with attached wheel assemblies. The side frames are interconnected by an X-folder apparatus. The X-folder apparatus has first and second elongate elements rotatably coupled to each other with the bottom ends of the elements rotatably attached to the bottoms of the side frames, and the top ends of the elements having perpendicular support elements that in the deployed open position, engage support brackets formed on the inner sides of the side frames. The support brackets have protrusions extending from bracket support surfaces to engage complementary apertures formed in the perpendicular support elements to provide stability to the wheeled walker.

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Xiamen, China

Haibin Wu