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AMIS
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AMIS
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Priority to ES364700ApriorityCriticalpatent/ES364700A3/en
Publication of ES364700A3publicationCriticalpatent/ES364700A3/en
Perfeccionamientos in valves without return, of the type of those constituted by a valve hollow element in flexible material, apt to be mounted in a drainage conduit and having an exit tip that is decreasing, the aforementioned extremity being formed by a pair of flexible lips defining a slit that is closed or opened according to the relative fluid pressures inside or outside of the valve element, characterized in that a continuous rib in relief is formed on the inner surface of one of the lips and it is apt to form a substantially linear sealed contact, with a corresponding face apt to receive said rib and located on the inner surface of the other lip at the edges defining the crevice of said lips. (Machine-translation by Google Translate, not legally binding)
ES364700A1969-03-131969-03-13Improvements in valves without return. (Machine-translation by Google Translate, not legally binding)
ExpiredES364700A3
(en)