Self equalizing ball caster lift mat

Details Self equalizing ball caster lift mat Self equalizing ball caster lift mat

1975-06-16

1976-04-06

Song, Robert R.

Land vehicles

Wheeled

Extensible

280 791, B62B 2118

Patent

active

039485382

ABSTRACT:
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.

REFERENCES:
patent: 171367 (1875-12-01), Estes
patent: 2671242 (1954-03-01), Lewis
patent: 2805098 (1957-09-01), Robinson
patent: 2830824 (1958-04-01), Young
patent: 3411802 (1968-11-01), Diller
patent: 3420541 (1969-01-01), Flurscheim

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