Chairs and seats – Movable bottom – Bottom and back movable as a unit
Patent
1993-09-03
1995-10-31
Dorner, Kenneth J.
Chairs and seats
Movable bottom
Bottom and back movable as a unit
192 481, 74665GD, 74 8915, B60N 202
Patent
active
054623375
ABSTRACT:
A driving apparatus which is capable of adjusting the forward and backward position and the height of a seat section by using a single motor to reduce the weight of the apparatus and simplify the structure. Nut members are mounted on operating threaded shafts which are rotated in normal or reverse by an electric motor so that the operating threaded shafts go through the nut members. A nut body constituting each nut member is structured so as to be engaged with one of first and second clutch members by a clutch operating member. In the first shift condition where the nut body is engaged with the first clutch body, power is turned on and the nut member moves back and forth relative to the operating threaded shaft. In the second shift condition where the nut is engaged with the second clutch body, power is turned off to hinder the movement of the nut member. The system of the apparatus is arranged so that the first nut members adjust the forward and backward position of the seat section and the second nut member adjusts the heights of the seat at the front and rear ends.
REFERENCES:
patent: 2839124 (1958-07-01), Desmond et al.
patent: 2919744 (1960-01-01), Tanaka
patent: 3022681 (1962-02-01), Cook
patent: 3125318 (1964-03-01), Lohr et al.
patent: 3194530 (1965-07-01), Heyl, Jr.
patent: 5014958 (1991-05-01), Harney
Dorner Kenneth J.
Jr. Milton Nelson
Matsuba Electric Manufacturing Co., Ltd.
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