Patent ID: 7735847

Claim:
An all-terrain adapter for a wheelchair of the type having a seat frame, including a foot support, and large rear wheels and smaller front wheels mounted to the seat frame for allowing the wheelchair to be rolled over a surface, the adapter comprising: a strut for removable attachment at one end to the foot support; a single nose gear wheel having a diameter that is at least ten inches; a swivel mount for attaching the nose gear wheel to another end of the strut so that the nose gear wheel swivels about an axis that is slightly inclined from the vertical; attachment means for attaching and detaching the one end of the strut to the foot support; and wherein the front wheels of the wheelchair are lifted from the ground and remain suspended above the ground by the action of propelling the wheelchair in the forward direction to cause the nose gear wheel to swivel in a direction that shortens the wheelbase of the wheelchair between the nose gear wheel and the rear wheels.