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Hoover Ltd
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Hoover Ltd
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Priority claimed from US484205Aexternal-prioritypatent/US2954802A/en
Application filed by Hoover LtdfiledCriticalHoover Ltd
Publication of ES226076A2publicationCriticalpatent/ES226076A2/es
Mejoras introducidas en las mangueras o tuberías flexibles objeto de la patente principal caracterizándose porque comprenden un arrollamiento helicoidal y elástico de refuerzo y un tubo profundamente ondulado de material elastómero preparado con ondulaciones helicoidales abiertas hacia el interior y hacia el exterior estas sin ocupar mientras que las primeras contienen el filamente del arrollamiento de refuerzo y además porque la profundidad de ondulación varía gradual y progresivamente por lo menos en una parte de la longitud de la manguera.
ES0226076A1955-01-261956-01-13PERFECCIONAMIENTOS EN MANGUERAS O TUBERiAS FLEXIBLES
ExpiredES226076A2
(es)
Procedimento e macchina per la fabbricazione di raccordi tubolari aventi tratti terminali diritti, uno dei quali conformato a bicchiere e un tratto intermedio curvo