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Individual
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Individual
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Priority to ES97538UpriorityCriticalpatent/ES97538U/en
Publication of ES97538UpublicationCriticalpatent/ES97538U/en
Expansion screw for anchoring in walls and similar, which is characterized by being formed by an outer cylindrical bushing open on both sides, which has towards its middle part extended windows and from these, to one of its ends, some cuts parallel to each other and with respect to the axis thereof that divide said end into other so many cylindrical sectors; a partially threaded shank having at its rear end a thickness of frusto-conical shape with the greater base outward, briefly extending in a smooth part and of the same diameter as said greater base and a threaded head that is applied to the anterior end of the shank and which is supported, by means of a washer, in the front mouth of the aforementioned bushing. (Machine-translation by Google Translate, not legally binding)
ES97538U1963-02-081963-02-08Expansion screw for wall anchoring and similar (Machine-translation by Google Translate, not legally binding)
PendingES97538U
(en)