Chair or armchair with adjustable backrest
AssigneeDonati S.p.A.
InventorArmando Donati
Life of this patent
Estimating the term…
Abstract
A chair assembly (1) of a chair or an armchair comprises a seat body (2), a backrest body (6), a locking and adjustment device (4), and a backrest support (10). The backrest support (10) is engaged with an articulated parallelogram that allows the position of the backrest body (6) to be changed while keeping it parallel to itself. The backrest support (10) further comprises spring return means.
Claims12
A chair assembly for a chair or an armchair, comprising a seat body for a seat, a backrest body for a backrest, a locking and adjustment device applied to the seat body and a backrest support that connects the locking and adjustment device to the backrest body,
- wherein the backrest support comprises a lower engagement portion fixed to the seat body, an upper engagement portion fixed to the backrest body, a first arm, hinged to the lower engagement portion in a first lower axis and to the upper engagement portion in a first upper axis, and a second arm, hinged to the lower engagement portion in a second lower axis and to the upper engagement portion in a second upper axis, to form an articulated parallelogram that allows the position of the backrest body to be changed while keeping the backrest body parallel to the previous position,
- wherein the backrest support comprises return means suitable to operate permanently to bring the backrest support towards a retracted limit position, and
- wherein said return means are elastic and comprise at least one spring, permanently in traction, operating on one of said arms and on a fixed stop.
Dependencies are inferred from the claim text.