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: 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: 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.