Patent ID: 8640798

Claim:
A motorized sled for attachment to a stair chair including first and second rear wheels, the sled comprising: a motorized track configured to engage steps of a staircase; and first and second spaced apart stair-engaging portions configured to contact steps of the staircase while the motorized track is engaging steps of the staircase, said first and second stair-engaging portions being pivotably attachable to the stair chair proximate the stair chair rear wheels, wherein the first and second stair-engaging portions comprise first and second rails; said motorized track being separately attachable to and detachable from said first and second stair-engaging portions while said first and second stair-engaging portions remain pivotably attached to the stair chair, wherein said motorized track and said first and second stair-engaging portions are pivotable in unison from a generally upright stowed position to a deployed position for engagement with steps of the staircase.