How is that even possible? I thought UL was a SAFETY certification! How can an appliance with an unfused, non-overheat-protected 110v motor possibly meet any kind of safety standard?
I can assure you that UL will have tested it. It is not a UL requirement that everything has to have a fuse. I have put equipment through UL without a fuse.
There are many other ways of preventing fires other than a fuse.
Was it a UL mark or a RUL mark with the R backwards? If the latter then it was only a component, it is the whole system that gets the normal UL mark. An approved component by itself does not have to be safe only conform to certain standards.