iRobot, the maker of the Roomba vacuum cleaner, filed for bankruptcy protection on Sunday and is pursuing a buyout from its primary manufacturer in China after the company's acquisition by Amazon was blocked over a year ago on antitrust grounds. iRobot first raised concerns about its ability to remain in business in March and filed for Chapter 11 bankruptcy protection in a Delaware bankruptcy court on Sunday as it faces competition from lower-priced rivals and new U.S. tariffs. It now plans to go private af ...