| 摘要 |
A steerable carriage apparatus for manually transporting a payload across a surface, the apparatus including a frame having a first end portion and a second end portion, further included is a plurality of arms each having a pivotal attachment to the first end portion. Wherein each pivotal attachment having a pivotal axis that is at an obtuse angle in relation to the surface, further each pivotal attachment is operational to allow a pivotal movement about each pivotal axis of each arm in relation to the first end portion. Also included in the apparatus is a plurality of first rotating elements that are each rotationally attached to each of the arms, each of the plurality of first rotating elements forming a contact on the surface, wherein each obtuse angle is adjacent to each contact on the surface, also each of the first rotating elements is operational to be steerable.
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