Linkage arm especially for awning

摘要

The linkage (1) has two arms which, when weight is not applied, include an angle of between 140 deg and 180 deg between them, and an angle of 0 deg when weight is applied. A pressure element (7) consisting of a helical spring (8) is positioned on the longitudinal axis of one or both arms (2,3). The screw's one end side may rest on a shoulder of the linkage arm. The second side of the helical spring may be pre-tensioned by a pin (14). The pressure element may be a hydraulic or pneumatic lifting cylinder.