Abstract: A rocker mechanism (10) preferably intended for rotatable arm chairs, comprising an upper part (12) which is attached to a seat and which is pivotally journalled to an underpart (14) by means of a horizontal pivot shaft (24), the underpart being carried by the vertical supporting pin of, for example, a rotatable arm chair. The underpart presents an upstanding holder (36) having a throughpassing opening (38) for accommodating a locking rod (48) provided with a handle and extending parallel with the pivot shaft (24), and promontories (40) which have a trapezium-shape cross section and which are intended for abutment with recesses (41) in two clamping plates or jaws (76) located on a respective side of the holder. The locking rod (48) is journalled in bearing blocks (58) on the upper part (12) and presents a lefthand screwthread (50) and a righthand screwthread (52) which co-act with respective screwthreaded holes (51 and 53) provided in the clamping plates or jaws (76).

Abstract: A composite leg-support with high loadability having a tubular vertical shank (4) and legs (1) which are releasably affixed to the shank and extending essentially horizontally and radially therefrom. The ends of the legs (1) pointing toward the center of the shank (4) have extensions (2, 3, 13, 18) which protrude into the interior of the shank (4), through openings (5) distributed along the periphery of the shank (4), and they engage in a force-locking manner with profiled discs (6, 10, 15) contained in the shank (4). The discs (6, 10, 15) are pressed towards one another by means of screw (11) extending along the longitudinal axis of shanks (4) and it is accessible from the lower end portion thereof.