Abstract: A longitudinally adjustable leg assembly, comprising a holder (9, 12) which is adapted to be fixed to the underside of a table top (1); first and second elongate carrier elements (2, 3) which are directed away from the holder (9, 12) and cooperate by threaded engagement. The first carrier element (2) is mounted rotatably but axially immovably in the holder (9, 12) and one (2; 3) of the first and second carrier elements (2, 3) having an external thread and the other (3; 2) of the first and second carrier elements (2, 3) being a tube having an internal thread portion at one end in threaded engagement with the external thread. An electric motor is arranged for rotating the first carrier element (2). A device is arranged for interrupting the current to the motor when the leg assembly is in a limit position of maximum or minimum length.

Abstract: A longitudinally adjustable leg assembly comprises a holder (11, 8) which is adapted to be fixed to the underside of a table top (1), and first, second and third elongate carrier elements (2, 3, 4). These cooperate by threaded engagement and are telescopingly displaceable inside each other. One of the first and third carrier elements (2, 4) is along essentially its entire length enclosed by and mounted rotatably but axially immovably in the holder (11, 8), and the other of the first and third carrier elements (4, 2) is arranged non-rotatably relative to the holder (11, 8). The leg assembly has a means for preventing rotation of the other of the first and third carrier elements (4, 2).

Abstract: A longitudinally adjustable leg assembly, comprising a holder (9, 12) which is adapted to be fixed to the underside of a table top (1); first and second elongate carrier elements (2, 3) which are directed away from the holder (9, 12) and cooperate by threaded engagement. The first carrier element (2) is mounted rotatably but axially immovably in the holder (9, 12) and one (2; 3) of the first and second carrier elements (2, 3) having an external thread and the other (3; 2) of the first and second carrier elements (2, 3) being a tube having an internal thread portion at one end in threaded engagement with the external thread. An electric motor is arranged for rotating the first carrier element (2). A device is arranged for interrupting the current to the motor when the leg assembly is in a limit position of maximum or minimum length.