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Priority to ES90924UpriorityCriticalpatent/ES90924Y/en
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Publication of ES90924YpublicationCriticalpatent/ES90924Y/en
An injection pump, characterized by having provided on the inner end of the rod, a hole in its base through which enters a threaded cylindrical end of a screw in which the rest of its body is frustoconical, holding between its frustoconical area and the end of the shank to a metal washer that forms the piston body, said washer being perfectly fixed by threading a nut in the cylindrical area of the screw. (Machine-translation by Google Translate, not legally binding)