Patent ID: 8668220

Claim:
An accessory system for a wheelchair, comprising: an accessory frame having one or more interface elements to mount to a wheelchair frame; a wheel assembly rotatably coupled to the accessory frame by a first fastener; an engagement system further coupling the accessory frame to the wheel assembly, the engagement system including: a capture member defining a capturing region, the capture member rotatably coupled to one of the accessory frame or wheel assembly by a second fastener, and a captured element fixed to another one of the accessory frame or wheel assembly, the capture element adapted to fit within the capturing region of the capture member; a control element configured to release the captured element from the capturing region of the capture member upon activation of the control element by a user; and wherein an axis of rotation of a fork portion of the wheel assembly relative to a head portion of the wheel assembly is inclined relative to a vertical/gravitational axis if the captured element is located outside of the capturing region and is substantially aligned with the vertical/gravitational axis if the captured element is located within the capturing region.