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Individual
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Individual
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Priority to ES288398ApriorityCriticalpatent/ES288398A1/en
Publication of ES288398A1publicationCriticalpatent/ES288398A1/en
Improvements in the systems for closing and opening doors, characterized by the provision of an endless shaft parallel to the direction of opening and closing of the door, on which a nut that is attached to the door is attached so that the rotation of the endless shaft produces the displacement of the nut and with it that of the door, achieving the opening and closing of the same depending on the direction of rotation of the shaft. (Machine-translation by Google Translate, not legally binding)
ES288398A1963-05-251963-05-25Improvements in door closure and opening systems (Machine-translation by Google Translate, not legally binding)
ExpiredES288398A1
(en)