Chairs and seats – Movable back – Tiltable
Patent
1985-03-11
1986-12-23
Dorner, Kenneth J.
Chairs and seats
Movable back
Tiltable
74 8915, 744248R, 185 39, 297354, 297362, B60N 102, F16H 2920, F03G 100
Patent
active
046308660
ABSTRACT:
A recline unit (6) for controlling the recline angle of the back rest (2) of a seat (1) is interposed as a strut between the back rest (2) and the seat base (3). The recline unit (6) has a recirculating ball screw (7) and nut (8) of which the former is mounted to the back rest (2) so as to be restrained against rotation and of which the latter is mounted to the seat base (3) so as to be restrained from moving axially but to be free to rotate. Manual pressure applied to the back rest (2) to incline it will move the ball screw (7) axially and cause the nut (8) to rotate. A locking mechanism (25) is provided to lock the nut (8) against rotation when the back rest (2) is in the desired reclined attitude and so prevent further axial movement of the ball screw (7). The occupant of the seat (1) can unlock the locking mechanism (25 ) by operating a button (40) which acts through a pull cable (37) on the locking mechanism (25). A back rest return device (41) includes a constant torque torsion spring (43) which, when manual pressure is removed from the back rest (2) and when the locking mechansim (25) is unlocked, will reversely rotate the nut (8) thereby to axially move the ball screw (7) reversely and so return the back rest (2) towards its upright attitude, the torsion spring (43) being strained when the nut (8) is rotated during reclining of the back rest (2).
REFERENCES:
patent: 895492 (1908-08-01), Neate
patent: 1895948 (1933-01-01), Van Den Broek
patent: 2175516 (1939-10-01), Bugatti
patent: 2579305 (1951-12-01), Cushman
patent: 2899193 (1959-08-01), Foster
patent: 3151704 (1964-10-01), Clarke
patent: 3194344 (1965-07-01), Sindlinger
patent: 3246868 (1966-04-01), Martens et al.
patent: 3479890 (1969-11-01), Howell
patent: 4000664 (1977-01-01), Christensen
patent: 4186615 (1980-02-01), Adams
patent: 4459867 (1984-07-01), Jones
Binder Mark W.
Dorner Kenneth J.
Morse Controls Limited
Wray James C.
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