Abstract: A chair-drive interface assembly is for use with a wheelchair assembly having a first chair-connection member and a second chair-connection member, and also for use with a drive assembly including a wheel assembly, a motor assembly, a drive-connection member and a steering assembly. The chair-drive interface assembly has a first connection member configured to be fixedly attached to the first chair-connection member. The chair-drive interface assembly also has a second connection member configured to be fixedly attached to the second chair-connection member. The second connection member is spaced apart from the first connection member. The chair-drive interface assembly also has a third connection member configured to be fixedly attached to the drive-connection member of the drive assembly.

Abstract: A configurable assistive device comprising: a platform; at least three wheels; and, at least three independent leg mechanisms, each respective leg mechanism coupled to the platform and a respective one of the at least three wheels, each respective leg mechanism configured to move the platform relative to the respective wheel for positioning the platform at an elevation and for inclining the platform to an inclination to configure the assistive device into one of a plurality of configurations.