Patent ID: 8430189

Claim:
A power add-on device for powering a manual wheelchair, comprising: a support structure; a motorized component supported by the support structure, the motorized component comprising dual electric motors and a power source configured to provide power to the electric motors; a set of drive wheels supported by the support structure in communication with the motorized component; an engagement mechanism configured to detachably couple the power add-on device to a camber tube that extends laterally between a first and a second rear wheel of the manual wheelchair; and a controller supported by the support structure configured to permit a user to control at least the motorized component of the power add-on device; wherein: the engagement mechanism is configured to move between a first position and a second position; when the engagement mechanism is in the second position, at least a portion of the engagement mechanism is configured to surround a portion of the camber tube of the manual wheelchair, thereby removably coupling the power add-on device to the manual wheelchair; and each of the electric motors is configured to turn a respective one of the set of drive wheels to propel the manual wheelchair removably coupled with the power add-on device.