Patent ID: 8607414

Claim:
A shock absorbing caster assembly comprising: a mounting bracket comprising: a plate member; a plurality of holes disposed in the plate member; a pair of side members disposed perpendicularly from either length of the plate member, each of said side members comprising an irregular polygon; a bolt hole disposed upon each of the side members; a curved slot disposed on each of the side members; a panhead bolt releasably insertable through each bolt hole; a wheel axle configured to moveably position within extremes delimited by each curved slot; a spring bracket mounted within the mounting bracket, said spring bracket comprising: a center piece having an upper edge, a lower edge, and a pair of side edges; an arced portion disposed upwardly from the upper edge; a parallelepiped spring member disposed upon the arced portion, said spring member configured to torsionally engage with the mounting bracket plate member when the spring bracket is compressed upwardly; each of a pair of side prongs disposed upon each of the pair of side edges, each of said side prongs disposed angularly downward from the center piece; and a wheel having a pair of bushings disposed between each of the pair of side prongs; wherein the panhead bolt releasably inserts through each bolt hole to releasably secure the spring bracket within the mounting bracket and the wheel axle releasably inserts through each curved slot to releasably secure the wheel within the mounting bracket whereby upward movement of the wheel, when forced thereto, is accommodated within extremes delimited by each curved slot; wherein the mounting bracket is installable on an extant shopping cart whereby upward compression of the wheel is absorbed by means of the spring bracket torsionally engaging with the mounting bracket.