Patent ID: 7125078
Filing Date: 2006-10-24
Classification: A47C,B60N

Abstract:
1. A device for adjustment of a compression force of a helical compression spring in an articulation of a chair, the device comprising: a threaded bushed bearing; a threaded pin extending through said bushed bearings, said threaded pin having a knob at one end and a hemispherical cap at an opposite end; a cylindrical articulation body that is at least partially hollow: a lever positioned in said articulation body and having a retaining pin pivotably gearing the lever to said articulation body, said threaded pin cooperative with said lever; a support rod having a hole at one end thereof, said hole receiving a fixation pin therein, said end of said support rod received in said articulation body; and a spring support slidably mounted in said articulation body, said lever cooperative with said spring support so as to move said spring support within said articulation body relative to a movement of said threaded pin, said spring support having a surface suitable for bearing against the helical compression spring.