Mechanical device for synchronous movement of the backrest and s

Details Mechanical device for synchronous movement of the backrest and s Mechanical device for synchronous movement of the backrest and s

1999-07-13

2000-09-19

Cuomo, Peter M.

Chairs and seats

Back movement resiliently opposed in operating position

Back adjusts independent of seat

2973001, 2973002, 2973005, A47C 1024

Patent

active

061200964

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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