Chairs characterised by structural features Chairs or stools with rotatable or vertically-adjustable seats

AHUMAN NECESSITIES A47Furniture A47CCHAIRS SOFAS BEDS

A47C3/00Chairs characterised by structural features Chairs or stools with rotatable or vertically-adjustable seats

A47C3/02Rocking chairs A47C3/021having elastic frames A47C3/023made of tubular material A47C3/025with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame A47C3/0252connected only by an elastic member positioned between seat and base frame A47C3/0255pivotally mounted in the base frame A47C3/0257slidingly movable in the base frame A47C3/026with central column A47C3/027with curved rocking members between seat and base frame A47C3/029with curved rocking members resting on the floor A47C3/03Locking members A47C3/04Stackable chairs Nesting chairs A47C3/045with tipping-up seats A47C3/12with shell-shape seat and back-rest unit A47C3/14of asymmetrical shape A47C3/16of legless type A47C3/18Chairs or stools with rotatable seat A47C3/185self-returning to the original position A47C3/20Chairs or stools with vertically-adjustable seats A47C3/22with balancing device A47C3/24with vertical spindle A47C3/245resiliently supported A47C3/26with vertical, or inclined toothed rack; with peg-and-notch mechanism A47C3/265with rack-and-pinion gearing A47C3/28with clamps acting on vertical rods A47C3/285with radially expansible clamping elements telescopically engaged in a tube or the like A47C3/30with vertically-acting fluid cylinder A47C3/32with flexible height-adjusting means A47C3/34with pins coacting with holes or bolt-and-nut adjustment A47C3/36with means, or adapted, for inclining the legs of the chair or stool for varying height of seat A47C3/38with additional seat or additional legs for varying height of seat A47C3/40Telescopic guides