Patent ID: 11951517
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 18:
19. A method for cleaning the inner side of a tank using the apparatus of claim 1, the method comprising:
rotating the nozzle support with respect to the frame about the first axis of rotation; and
rotating the nozzle with respect to the nozzle support about the second axis of rotation, wherein:
the nozzle is rotated about the second axis alternatingly (i) from the cleaning start position to the cleaning stop position by the cleaning angle and (ii) from the cleaning stop position to the cleaning start position;
the cleaning angle is smaller than one revolution; and
the angular velocity of the nozzle with respect to the nozzle support during the movement of the nozzle from the cleaning start position to the cleaning stop position within the cleaning angle is (i) smaller than the angular velocity of the nozzle support with respect to the frame and (ii) smaller than the angular velocity of the nozzle with respect to the nozzle support during the movement of the nozzle from the cleaning stop position to the cleaning start position.