US Patent 6957860 Stackable chair with glides

A stackable chair having a support structure and a seat and a back mounted to the support structure. The support structure includes two horizontally extending runner portions, each with two pairs of grooves. Mounted to the runner portions and engaged with the pairs of grooves are four glides. Each glide includes two arms and a base and a recess in the base. The arms each have a horizontally extending rib projecting inwardly so as to engage the grooves. Molded into each glide at the recess is a hard industrial felt member.