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Chair, particularly a data display chair

  • US 4,411,469 A
  • Filed: 07/17/1980
  • Issued: 10/25/1983
  • Est. Priority Date: 07/23/1979
  • Status: Expired due to Term
First Claim
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1. A chair comprising:

  • base means, seat means pivotally supported at said base means;

    back rest means pivotable with respect to said seat means about a substantially horizontal axis, spring means kinematically coupling said seat means and said back rest means, a first pair of links having first ends pivotally connected to said seat means and second ends pivotally connected to said back rest means, a second pair of links having first ends pivotally connected to said seat means and second ends pivotally connected to said base means, one of said pairs of links forming an angle lever pivotally connected at said seat means, said angle lever provided with means for adjustably supporting one end of said spring means, said means for adjustably supporting said spring means comprises a nut journaled on a threaded spindle, said nut supporting a pivot supporting one end of said spring means, and a bar having one end pivotally supported at said pivot and the other end pivotally supported as said angle lever.

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