Dyson V6 Operating Manual page 22

A new idea
A local sawmill caught James' eye. Under cover
of dark he sketched the timber yard's giant cyclone.
It spun sawdust out of the air, collecting it in a
chamber. Could the same principle signal the end
of clogging vacuum cleaner bags?
Five years and 5,127 prototypes later, a machine
that had no bag and no loss of suction.
Dyson proves no loss of suction on using IEC60312. 9 test standard