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Priority to ES89417UpriorityCriticalpatent/ES89417Y/en
Publication of ES89417UpublicationCriticalpatent/ES89417U/en
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Publication of ES89417YpublicationCriticalpatent/ES89417Y/en
An articulated coupling, characterized by consisting of two tubes joined to two elbow sleeves, joined in turn to each other, the three joints being made by as many sets consisting of a hollow screw, a joint equipped with a central passage, a spring and an annular nut , the union between the elbow sleeves being rotatable, the angles formed by the branches of both elbows being equal. (Machine-translation by Google Translate, not legally binding)
Improvements in the devices maintaining the hermeticity in the joints of articulated pipes (Machine-translation by Google Translate, not legally binding)