Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Publication date
Publication of GB259660ApublicationCriticalpatent/GB259660A/en
259,660. Green, E. W., and Unthank, G. R. July 13, 1925. Vacuum apparatus. - Ships' oil tanks are cleaned out, and viscous liquids removed generally from surfaces by a suction mouthpiece a combined with a pressure nozzle b supplying a broad thin jet of steam or other heated fluid to the oil &c. to render it mobile. The steam may be supplied through a valve which is opened by the operator against spring pressure.