Rotatable chair on five-legged undercarriage for use in office has central column supporting inflatable rubber cushion and fixed backrest

摘要

The chair may have five feet with casters and a central swiveling column (A) or may have four legs without casters or swiveling action. The seat (B) may consist of an air-filled closed rubber bag. The backrest (C) is connected to the central column by a thin rod with an approximately 90 degrees bend.