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Priority to ES0211878ApriorityCriticalpatent/ES211878A2/en
Publication of ES211878A2publicationCriticalpatent/ES211878A2/en
Improvements in the object of the patent of invention no. 208,713 relating to a compressed air device for regulating respiration characterized by the existence of a valve inside the terminal nozzle of the conduit tube consisting of a protractor rod axis of a circular ring on whose ribbed spine act by friction the edges of two levers that tightened with the teeth by the swimmer determine their rise or fall in the interior of a guide whose mouth seals or leaves free air passage. (Machine-translation by Google Translate, not legally binding)
ES0211878A1953-10-271953-10-27A compressed air device to regulate breathing (Machine-translation by Google Translate, not legally binding)
ExpiredES211878A2
(en)
Improvements introduced in the rigid lungs especially for automatic breathing apparatus. (Machine-translation by Google Translate, not legally binding)