The present invention relates generally to handling and/or storing hazardous waste materials, such as radioactive materials, and is more specifically directed to loading and/or unloading radioactive material into or out of a container, such as a drum, by remote operation, and more particularly the present...http://www.google.es/patents/US6151862?utm_source=gb-gplus-sharePatente US6151862 - Container cover closure apparatus
