Patent ID: 7243572

Claim:
A control shaft for coupling a user interface to a platform that supports a standing user of a personal transporter, the control shaft comprising: a. a lower shaft segment having at least one rib on an interior surface that extend parallel to an axis of the lower shaft segment and having an exterior surface; b. an upper shaft segment, with first and second apertures, coupled to the lower shaft segment; c. a first ring, circumferentially coupled to the exterior surface of the upper shaft segment, having at least one groove substantially parallel to an axial direction for meshing with the rib of the interior surface of the lower shaft segment and a first tab that fits within the first aperture of the upper shaft segment; and d. a second ring, circumferentially coupled to the exterior surface of the upper shaft segment, having at least one groove for meshing with the rib of the interior surface of the lower shaft segment and a second tab that fits within the second aperture.