Apparatus for cleaning inner surfaces of hollow cylindrical container

An apparatus, for washing and polishing inner surfaces of a hollow cylindrical container, comprising:

• (i) a support
• (ii) a shaft carried in rotatable manner by said support, said shaft having its axis of rotation vertical when in use,
• (iii) drive means coupled to said shaft for rotating it,
• (iv) a first arm secured at one of its ends to said shaft for rotation therewith,
• (v) brush means carried at the other end of said first arm for contacting the inner surface of the hollow cylindrical container, said first arm including along its length a plurality of arm portions coupled serially end to end by pivot means whereby the radial extent of said first arm is variable by relative pivoting of adjacent coupled arm portions and the radial extent of said first arm may be varied by centrifugal force to urge said brush means against the inner surface of the hollow cylindrical container when said shaft and said first arm are rotated,
• (vi) a second brush supporting arm coupled by a universal joint to a lower part of said shaft and having thereon a radially positioned brush, said second arm being movable by means of said joint with respect to the axis of the shaft to permit said radial brush to follow a container bottom which is inclined with respect to the shaft axis.

An apparatus, for washing and polishing inner surfaces of a hollow cylindrical container, comprising:

• (i) a support
• (ii) a shaft carried in rotatable manner by said support, said shaft having its axis of rotation vertical when in use,
• (iii) drive means coupled to said shaft for rotating it,
• (iv) at least one arm secured at one of its ends to said shaft for rotation therewith,
• (v) brush means carried at the other end of said arm for contacting the inner surface of the hollow cylindrical container, and
• (vi) cover means to seal an open top of the hollow cylindrical container, said cover means having an exhaust duct.