I stated previously that I started thinking about renewable power and one idea I had was the bellows hoover, updated and modernised to be powerful, quiet, cheap and entirely energy free.
It looks like the concept was abandoned decades ago, probably with the advent of the electric hoover.
My idea was to have a design much like a modern upright vacuum cleaner but with the wheels driving a rubber belt to two opposing cams driving push rods to pump two bellows in opposition so that there was suction all the time to two rows of nozzles sucking the dust from the carpet. The same cams and push rods would open and close valves which would allow the dust to be collected into an attached waste container that can be removed and emptied periodically.
Without a heavy motor or electrical cable and using low cost, long lasting parts it could be efficient, very cheap to purchase and run, light and manoeuvrable and have a very long service life.
Perfect for the global environment in this time of climate crisis.
I've Got Summink to Say 