| 摘要 |
<p>The self equalizing ball caster lift mat of the present invention includes a load support sub-assembly and a caster sub-assembly interconnected by a pressure member. The load support sub-assembly is a flat plate adapted for insertion under a load and for bearing the weight of a load. The caster sub-assembly comprises an alignment plate having a plurality of transverse bores therethrough arranged in an array. A ball caster is mounted for reciprocating movement in each of the bores.</p> |
