Patent ID: 7597043
Filing Date: 2009-10-06
Classification: F04B

Abstract:
1. A diaphragm pump, comprising: a case; a diaphragm unit comprising a plurality of diaphragms which are layered on top of each other, wherein the case and the diaphragm unit define a pump chamber, the diaphragm unit has a first surface and a second surface on the side opposite to the first surface, and wherein, when the diaphragm unit changes its form, the volume in the pump chamber increases or decreases, and as a result, a fluid flows into or out of the pump chamber; and a support member for supporting the diaphragm unit, wherein the support member has a first support surface for supporting the first surface and a second support surface for supporting the second surface, and the support member allows the diaphragms to slide between the first support surface and the second support surface in case where the diaphragm unit changes its form, wherein a minimum gap between the first support surface and the second support surface is set to a value no less than the thickness of the diaphragm unit.