Patent ID: 7363864

Claim:
A mechanic's track creeper, comprising: a body; a support feature disposed on an upper surface of the body, configured to support a user thereon; and a rail interface coupled to the body, the rail interface being operatively engageable with a first rail having a translational axis, the rail interface comprising an outwardly protruding flange disposed on a first axial end of the rail interface, the flange configured such that when the rail interface is operatively engaged with the first rail, the flange is operatively disposed along a first side-wall of the first rail, thereby ensuring substantially proper alignment of the rail interface relative to the first rail; wherein the creeper is enabled to translate from a first position to a second position along the translational axis of the first rail; wherein the rail interface comprises a first wheel, rotatably mounted on the body, and configured to operatively engage with the first rail, wherein the outwardly protruding flange is disposed on a first axial end of the wheel; and wherein the rail interface also comprises a guide bar configured to slidingly contact the side-wall of the first rail when the wheel is operatively engaged with the first rail, thereby further ensuring substantially proper alignment of the first wheel relative to the first rail.