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Individual
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Individual
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Priority to ES1971175566UpriorityCriticalpatent/ES175566Y/en
Publication of ES175566UpublicationCriticalpatent/ES175566U/en
Application grantedgrantedCritical
Publication of ES175566YpublicationCriticalpatent/ES175566Y/en
Improved case, provided with a spring by torsion spring made of appropriate material yarn, characterized in that its ends are bent two at right angles, so that one end adopts a vertical downward orientation and is housed in a hole made in the the back side of the box case, while the fold of the opposite side of the spring, is oriented in a plane perpendicular to the previous one and is housed in another hole made in the back side of the lid of the case, this when the spring after the tensioned and twisted when the case is closed, the lid, is required if you are left free to make a path corresponding to an angle of a certain number of degrees, opening automatically. (Machine-translation by Google Translate, not legally binding)