Chair with tilting backrest

  • US 5,580,127 A
  • Filed: 05/26/1994
  • Issued: 12/03/1996
  • Est. Priority Date: 05/27/1993
  • Status: Expired due to Term
First Claim
Patent Images

1. A chair comprising a base structure, a seat supported by the base structure and a backrest having a support structure which is pivotally mounted on the base structure around a transverse horizontal axis and movable between a relatively upright position and a backwardly reclined position, and spring means biasing the backrest towards its upright position,wherein said spring means comprise a leaf spring arranged along said transverse horizontal axis of the backrest support structure and having a central portion operatively connected to said base structure and opposite ends connected to said backrest support structure, andwherein said base structure includes a tubular cross member inside which said leaf spring is arranged, said tubular cross member extending the entire length of said leaf spring and having at its central portion at least an inner stop element adapted to cooperate with said leaf spring to limit rotation of the latter.

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