Horizontally supported planar surfaces – Vertically adjustable
Patent
1986-08-27
1988-07-05
Dorner, Kenneth J.
Horizontally supported planar surfaces
Vertically adjustable
2481882, A47B 900
Patent
active
047547138
ABSTRACT:
An extendable and retractable structure with an orientable plane, adapted to cooperate with a holding surface. Connection arrangement are connected to the plane and the holding surfce. The structure includes connecting assemblies of at least two rigid arms of constant length, at least two linearly extendable and retractable actuators which are independent of each other, and controlling device connected to actuators.
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Chen José V.
Dorner Kenneth J.
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