>>like xerox for photocopier etc

Although I have noticed more and more folk say Dyson instead of Hoover in conversation, even though almost no-one would say Electrolux in the same context.

I guess it may be because Dyson had a sufficiently innovative idea to be distinguished from Hoover.

And I have no idea what a zamboni is. From the earlier posts it obviously has something to do with ice-rinks but it has never impinged on my consciousness. Is it American?