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Priority to ES0210788ApriorityCriticalpatent/ES210788A3/en
Publication of ES210788A3publicationCriticalpatent/ES210788A3/en
Automatic Analysis And Handling Materials Therefor
(AREA)
Abstract
New head valve system for tube wells characterized in that a valve is formed by an upper elbow that is screwed on the mouth or upper part of the well a second flexible valve and a counterweight for the flexible valve. (Machine-translation by Google Translate, not legally binding)
ES0210788A1953-08-071953-08-07A new system of head valves for pipe wells (Machine-translation by Google Translate, not legally binding)
ExpiredES210788A3
(en)