A mop head wringer is designed to be placed on a bucket and used therewith. The mop head wringer includes a screen basket which is mounted within a supporting frame. The screen basket is to be movable from an upper at-rest position to a lower wringing position. The screen basket is mounted on a shaft...http://www.google.co.uk/patents/US5611104?utm_source=gb-gplus-sharePatent US5611104 - Mop head wringer to be used with a bucket
