| 摘要 |
Disclosed is a creeper for movably supporting a reclining worker in confined space on a variety of ground surfaces. The creeper includes a body platform; at least three wheels rotatably mounted relative to the platform for rolling ground contact whereby the platform is movable by the worker above the ground surface. Each wheel has a circumferential outer rib, preferably having an outside diameter not less than approximately 5 inches and a rib width not greater than approximately 1.5 inches for smooth rolling contact with the ground surface when the ground surface is hard and flat; and a plurality of side ribs laterally extending on opposite sides of the outer rib, the side ribs collectively having a major diameter preferably not less than approximately 1.4 inches greater than a minor diameter of the ribs, the outside diameter being between approximately 0.1 inch and 0.6 inch greater than the major diameter. The side ribs preferably extend proximately to an outside width of the wheel that is not less than approximately 5 inches for rotating engagement with the ground surface and buoyant support thereby when the ground surface is soft and unstable, each side rib having a smooth undulating contour between the major diameter and the minor diameter. At least one pair of the wheels can be rotatably mounted on a common axis fixably located relative to the body, another pair of the wheels being movably located for permitting steerage of the creeper.
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