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Chairback with side torsional movement

  • US 5,951,109 A
  • Filed: 04/30/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 04/30/1997
  • Status: Expired due to Fees
First Claim
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1. A chair assembly comprising:

  • a chair base;

    a seat assembly connected to said chair base, said seat assembly including a horizontally enlarged seat thereon;

    a back assembly which includes an upright which is pivotally connected to a rear portion of said seat assembly and extends upwardly therefrom, said upright being tiltable relative to said seat assembly in a direction rearwardly away from a normal upright position toward a rearwardly tilted position, said upright having a lower first back member and an upright second back member extending upwardly away from said first back member and above said seat assembly for supporting the back of a user, a forward section of said lower first back member including a first rearward pivot pivotally connecting said upright to said seat assembly for said rearward tilting of said upright about a horizontal first pivot axis which extends sidewardly, a lower section of said upright second back member being pivotally connected to a rearward section of said first back member by a sideward pivot which defines a second horizontal pivot axis oriented transverse to said first pivot axis and extending in a generally forward-rearward direction such that said upright second back member pivots laterally about said second pivot axis.

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