In 1841 it was decided to coupling a kind of bicycle pump to a standard percolator to increase the water pressure. It’s from 1874 a patent for the use of a pump diaphragm rubber to compress the air inside a vessel containing boiling water and thus speed up the extraction: this system is known in England as "Pull and push ".
Model “Aeropercolateur” produced by Neofiltre Vite et Bon in France, about 1940.
