Patent ID: 8132860

Claim:
An armrest construction for a chair, comprising: a support post having an elongate main section along a major length thereof and an armrest mount defined at a free end of said main section, said free end being hollow so as to define a peripheral interior post surface and being shaped to define a non-circular outer peripheral profile when viewed from said free end which said profile is defined by a plurality of peripherally spaced lobes separated from each other by elongate channels, said interior post surface defining a central opening which opens end-wise from said free end; and an armrest assembly comprising an armrest body mountable to said armrest mount of said post, said armrest body comprising a hub mountable to said armrest mount and a support arm positioned to support a chair occupant, said hub defining an open socket which comprises a seat which receives said armrest mount therein, said seat being defined at an inner end by a socket end wall and having a non-circular inner peripheral profile defined by a plurality of ribs spaced apart by grooves which said ribs and grooves respectively conform to and mate with said channels and lobes of said armrest mount to non-rotatably position said hub relative to said armrest mount, said armrest assembly further including a fastener which projects through said socket end wall and fixedly engages said central opening of said armrest mount to fixedly secure and prevent removal of said armrest body from said post.