On 05/08/2019 11:29, Harry Bloomfield wrote:
Marland pretended :
but more is removed than is being pumped in by quite a percentage
using the
Venturi effect .

The venturi effect as invented by Dyson.

Yes

Not only didn't he come up with the idea, but industial cyclones had
been in use for decades. I am amazed that he was granted a patent -
there was no novel technology there.

SteveW