Abstract: In the door stop, the arm which is pivotally mounted on the door has the shape of a flat strip against the respective edges of which strip are applied under elastically yieldable pressure two rollers. The first roller, which, in the open position of the door, is engaged in a stop notch, is fixed in position, whereas the other roller is rotatably mounted on a transverse portion of a stirrup which connects adjacent end portions of two helical windings of a torsion spring. Each roller comprises two rings which are fitted one inside the other and have a sliding contact between each other, with the pins on which they are mounted, with the arm and with inner faces of a bracket carrying the pins.

Abstract: A door closer comprising at the end of one of two pivotally interconnected arms a closing device whose housing encloses a cylindrical piston driven by the arm through a rack-and-pinion system. On each side of this piston a return spring and a bag, filled with an incompressible but deformable viscous gum placed in a hollow piston biased elastically toward the cylindrical piston are placed on each side of the first-mentioned piston. The hollow piston has a diameter distinctly larger than the diameter of the first-mentioned piston, and the combined actions of this difference in diameters and of the viscosity of the gum ensure an effective braking of the return of the first-mentioned piston.

Abstract: Pivotally mounted on the door is an arm which has a stop recess in which there may be retained a fixed roller which is mounted in a bracket member fixed to the fixed post of the door. The arm is applied against the roller under the effect of a movable roller which is mounted on the bracket member and is biased into contact with the arm by a torsion spring which has two windings which are disposed symmetrically on each side of branches of the bracket member.

Abstract: In the illustrated window raiser, the window is raised or lowered by a motor which drives a screw engaged with a nut constituting a slide guided in a slideway by means of two symmetrical crossed arms. The arms are connected to the slideways at the base of the window and to two fixed center slideways and are connected to each other at their crossing point by an articulation carried by the nut. The articulation rigidly interconnects two semi-arms constituting one of the arms and disposed on each side of the other arm which is in a single piece. The two arms are capable of undergoing angular movements on each side of the axis of the articulation. A drive comprising a pinion and a rack cable may be substituted for the illustrated screw and nut mechanism.

Abstract: A device comprises a cap formed by a body (4) provided with a base (8) which is biased outwardly by a spring (12) and carries an annular sealing element having a lip (10). The base is provided with a center orifice (14). Mounted on the outer face of the base (8) is a sealing element (20) which is also provided with a center orifice. A filtering element (18) is clamped between the element (20) and the lipped element (10) and closes the orifice (14) so as to substantially preclude the passage of the liquid while allowing the passage of air. The filtering element is formed for example by a tablet which may be partly protected by a thin and impermeable diaphragm (110).

Abstract: The door stop device comprises two pivotally interconnected links for pivoting, one link, to a door and, the other link, to a fixed part on which the door is pivotally mounted. The links are capable of being unfolded and folded when opening and closing the door. A first link is extended beyond its pivotal connection to the other link by two semi-cams. Each of the semi-cams defines a stop notch. A cam follower movably mounted in the second link is capable of engaging the stop notches under the action of a spring in the second link to create a retention in the course of the unfolding of the links. This retention may be overcome to permit the return of the links to their folded position.