| 摘要 |
<p>A carriage assembly and a base therefor, are disclosed. The base comprises a pair of elongated feet, a bi-ended stiffening member and mounting means. The mounting means are located on each of the feet for mounting a portion of a leg of an upstanding, bi-legged frame member. Each foot defines a longitudinal axis between respective ends thereof. Each end of the stiffening member is affixed to a respective foot to keep the longitudinal axis of one foot in parallel relation with the longitudinal axis of the other foot thereby providing the base with structural rigidity. Each foot includes respectively a wheel at one end thereof and a pad at an opposite end thereof. As to an individual foot, the wheel is aligned to provide the foot with mobility in the direction of its longitudinal axis, and each such mounting means is superimposed intermediate a certain pair of load-bearing regions of the foot thereby providing the base with stability.</p> |
