US Patent 7386912 Expandable cleaning brush

A cleaning and scouring brush generally made from a pair of twisted wire arms, each arm having a cleaning portion shaped to conform to the interior profile of an article to be cleaned. The portions are provided with a cleaning or scouring device such as a sponge, scrubber or bristles intended to clean or scour the interior surface of the article to be cleaned. The brush is also provided with a handle which rotates the cleaning portions with respect to one another about an axis in order to facilitate the entry and removal of the device from the article to be cleaned which generally has a relatively small opening into a relatively large interior volume.