US Patent 7159681 Personal transporter

A four-wheel personal transporter having a collapsible shell and a seat mounted on at least one shaft disposed at the rear end of the device, such shaft(s) movable approximately 90 degrees rearward from an upright position to a storage position and maneuvered into a receipt slot defined in the top portion of the rear shell, and a steering column disposed at the front end of the personal transporter in an upright position for use and rotatable approximately 90 degrees downward to a storage position against the top of the shell when such shell is in its collapsed storage mode, such steering column having a handle usable to pull the device on its front wheels in its storage mode.