Abstract: A device for locking and unlocking the position of a moving part of a seat such as a seat on an airplane or other vehicle is disclosed. The device includes a screw and nut assembly with a clamping element. The clamping element allows movement of the moving part of the seat when the clamping element is released and holds the moving part of the seat in position when engaged.

Abstract: The invention concerns a device for locking the configuration of an equipment such as a vehicle seat comprising a support and a mobile part. It comprises: at least three mutually mobile elements (42, 48) linked respectively to a support and to the mobile part in spatial succession; means (54) for clamping the elements (42, 48) to prevent a displacement of the mobile part relative to the support; and an unlocking member (58) for allowing movement, the unlocking member being controllable independently of the mobile part. The unlocking member (58) is designed to cancel the clamping exerted by the clamping means (54).

Abstract: The invention concerns a device making it possible to firstly limit the dynamic or static force applied to a linear electric jack with a reversible screw/nut system, and secondly translation-disengage the screw of the jack. This device is formed of an element (2) integral with the screw (7) of the jack and an element (1) integral with the activated load and interconnected by a friction system (3). The force applied on the screw (7) tends to make the latter rotate inside the screw (8) of the jack. This rotation is stopped by the friction system (3) until the latter slides and separates the elements (1) and (2). The screw (7) then rotates with respect to the element (1) which limits the force. The replacement of the friction element (3) by a coupling makes it possible to externally control the rotation and translation of the screw (7). The end of travel stops (13) secured to the screw (7) rotate with this screw whilst retaining their characteristics.