Frederick W Greene

US Patent:

45596697, Dec 24, 1985

Filed:

Jun 7, 1984

Appl. No.:

6/618345

Inventors:

Richard C. Bonzer - Long Beach CA
Frederick C. Greene - Long Beach CA

Assignee:

Darnell Corporation, Ltd. - Downey CA

International Classification:

B60B 3300

US Classification:

16 44

Abstract:

A shock resistant caster includes two structures one of which is connectable to a unit to be supported, and the second of which carries a wheel and is connected to the first structure for pivotal movement relative thereto. A cushion formed of elastomeric material is positioned to be compressed upon imposition of a load on the caster, to attain a cushioned support of the load, and may be held in position by a locating pin connected to one of the two relatively movable structures and extending through a passage in the cushion. The wheel preferably has an elastomeric portion formed of a material which is softer than the elastomeric material of the cushion, with the overall effect of the entire assembly being to produce a ride which is soft under low load conditions and becomes progressively stiffer in non-linear fashion as the load increases to optimize the support of the carried unit under all conditions.