Control mechanism for the seat carriers of chairs, especially sw

Details Control mechanism for the seat carriers of chairs, especially sw Control mechanism for the seat carriers of chairs, especially sw

1994-10-14

1996-12-31

Nelson, Jr., Milton

Chairs and seats

Movable back

Tiltable

2974631, A47C 1027

Patent

active

055887066

ABSTRACT:
A control mechanism for a seat carrier of a chair, especially a swivel chair. A pivotable part is clamped and released by lamellae with rotatably anchored ends. One set of ends is anchored without play; the other, with play. The ends anchored with play are suspended via holes from a clamping bolt which can slide, inside the clamping mechanism, against a spring that clamps the pivotable part. The lamellae are released by a control lever. The clamping bolt is slideably fitted in a pressure sleeve of diameter greater than the holes in the lamellae. The bolt behind the pressure sleeve has a stop that bears against the pressure sleeve during active clamping. On its other side this bolt passes through the wall at which the clamping action takes place. The outside of the clamping bolt, at a distance from this wall, has a mounting for a pressure spring that acts between the bolt and the wall. The pressure spring pushes the bolt outward, thus directing the clamping force to the lamellae. The control lever is pivotably mounted in a rigidly anchored support. A pressure nose of the control lever bears against the bolt head and moves the bolt transversely and horizontally toward the lamellae against the pressure spring.

REFERENCES:
patent: 4062587 (1977-12-01), Wolters
patent: 4198094 (1980-04-01), Bjerknes et al.
patent: 4636004 (1987-01-01), Neumuller
patent: 5066869 (1991-11-01), DeGelder
patent: 5228748 (1993-07-01), Neumuller
patent: 5356200 (1994-10-01), Stumpf et al.

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