Patent ID: 8834136
Filing Date: 2014-09-16
Classification: F04B

Abstract:
1. An undulating diaphragm pump having a propulsion chamber for receiving a diaphragm, wherein the diaphragm has mechanical characteristics that vary from an inlet of the propulsion chamber towards an outlet of the propulsion chamber in such a manner that when said pump is operated, the diaphragm is actuated to deform with a traveling wave that propagates from the inlet towards the outlet of the propulsion chamber in order to propel the fluid and the propagation speed of the wave in the diaphragm in any cross-section relative to the movement of the fluid inside the propulsion chamber is equal to or greater than the mean travel speed of the fluid in said section, and wherein the diaphragm is made out of at least one material so as to have a modulus of elasticity (E) in the material of the diaphragm that increases going from the inlet towards the outlet of the propulsion chamber.