Chairs and seats – Movable back – Tiltable
Patent
1979-04-16
1982-04-27
Lyddane, William E.
Chairs and seats
Movable back
Tiltable
74800, 16333, 16354, A47C 1025
Patent
active
043267483
ABSTRACT:
An adjustment device for adjusting the relative angular position of two elements pivotally connected to one another, in particular two elements connectable one to the cushion and the other to the back of a seat, the device including a case; first and second gears facing each other inside said case and having a different number of teeth; a ball-and-socket joint arranged centrally within said case to support said second gear in an inclined position relative to said first gear and in meshing contact therewith; first and second co-axial shafts pivotally mounted on said case, said first shaft being rigidly connected to said first gear; key means to prevent rotation of said second gear relative to said case; and transmission means arranged between said second gear and said second shaft to transform a rotation of the latter into a precession movement of said second gear about the center of said joint and in meshing contact with said first gear.
REFERENCES:
patent: 2699690 (1955-01-01), Kobler
patent: 3640154 (1972-02-01), Massie
patent: 4054966 (1977-10-01), Putsch et al.
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