A device for sampling liquefied gas from a receptacle including a sample-receiving container arranged within a compressed-gas vessel, the sample-receiving container being double-walled, the interspace in the double wall communicating with the receptacle for cooling the sample-receiving container by the...http://www.google.es/patents/US3938391?utm_source=gb-gplus-sharePatente US3938391 - Sampling device for liquefied gases
