Device for controlling the step-by-step displacement of an eleme

Details Device for controlling the step-by-step displacement of an eleme Device for controlling the step-by-step displacement of an eleme

1986-06-18

1987-05-19

Dorner, Kenneth J.

Chairs and seats

Movable back

Tiltable

297361, 74 8917, 74530, B60N 102, F16H 2702

Patent

active

046662103

ABSTRACT:
The device comprises inside a housing (14) a gear pinion (10) connected to rotate solely with a control rod (12) and engaged with a rack carried by a U-section rod (6) connected to the element to be displaced. A bolt (18), formed by two yokes which are pivotable relative to each other, comprises a set of teeth (20) engaged in the locking position with the rack and is retained in its lower part in the housing, so that the axial displacement of the control rod (12) folds it in its central part and releases the rack which can be displaced with the gear pinion. The bolt is resiliently biased to the locking position as soon as the pressure exerted by the rod (12) ceases.

REFERENCES:
patent: 1142974 (1915-06-01), Leonhauser
patent: 2859630 (1956-11-01), Hatch
patent: 3133764 (1964-05-01), Naef
patent: 3403581 (1968-10-01), Harness

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