#1209: Coughvac

I’m perpetually irritated by our vacuum cleaner hose blocking up. Today’s invention is a response.

Just as when someone develops a restriction in their airway, this vacuum cleaner would have a sensor fitted to the motor which could detect the rise in current drawn when the hose began to block.

Quickly, it would change the motor direction, causing a sudden reversal of flow or ‘cough’.

This would last for only a fraction of a second, so that there would be no danger that a blockage could emerge from the hose inlet at any speed.

The cough could be repeated several times in succession if the motor load was not rapidly reduced.