Cleaning device
Patent 4052950 Issued on October 11, 1977. Estimated Expiration Date: 
October 11, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 11, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 487198 1718804 3321787 3444575 InventorApplicationNo. 682707 filed on 05/03/1976US Classes:114/222, Hull cleaning15/1.7, SUBMERGED CLEANERS WITH AMBIENT FLOW GUIDES15/385Axis non-parallel to work surfaceExaminersPrimary: Blix, Trygve M.Assistant: O'Connor, Gregory W. Attorney, Agent or FirmInternational ClassB60S 003/02Foreign Application Priority Data1975-05-06 JAAbstractA device for cleaning materials attached to a vessel and a building structure below water level is provided which comprises a generally cylindrical outer shell and a central chamber arranged concentrically within the outer shell, the chamber having an impeller for discharging the attached materials together with water through a circular space between the outer wall of the chamber and the inner wall of the shell, and a cleaning device for removing the materials on the surface of the vessel and the structure. In operation of the impeller the device is absorbed and adhered onto a cleaning surface of the vessel and the building structure whereby cleaning operation can be effected without the device being pressed onto the cleaning surface. | |
