Mechanical device for synchronous movement of the backrest and seat of a chair
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 19, 2000
Grant Date -
N/A
app pub date -
Jul 13, 1999
filing date -
Jul 16, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mechanical device for synchronous movement of a seat and a backrest of a chair comprising a first supporting bracket which is associated with a central column which protrudes from a rotating base and is pivoted transversely to an end of a second fixing bracket for the seat. The second bracket cooperates with two pairs of slotted laminar elements which are pivoted to the first bracket. A third anchoring bracket for the backrest is also provided which is pivoted to the first bracket and to a pair of linkages which are in turn pivoted to the second bracket. Moreover, a piston is present between the third and first brackets and a pair of springs is present between the first and second brackets.
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Cited Art Landscape
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