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Priority to ES1974203851UpriorityCriticalpatent/ES203851Y/en
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Publication of ES203851YpublicationCriticalpatent/ES203851Y/en
An antagonistic device for metal doors, characterized in that it is formed on the pivot pin of the door hinge, for which said pin protrudes at one end of the hinge in the form of a connecting rod of an opposing spring, while at the same time at the other end, the same pin forms a crush or square to which the movable leaf of the hinge is molded with a bent fold, so that the rotation of said movable sheet, with the opening of the door, drags the pin to produce the twisting or antagonistic twisting of the spring, so that the later elastic restoring force of the spring in the opposite direction pulls in reverse of the moving leaf, causing the door to close by itself. (Machine-translation by Google Translate, not legally binding)
ES1974203851U1974-06-111974-06-11
ANTAGONISTIC DEVICE FOR METAL DOORS.
ExpiredES203851Y
(en)