There are three main types of diaphragm pumps:
When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine.
Agency Reviews Patent Application Approval Request for "Compressing Diaphragm Pump Having Abnormal Pressure Preventing Features for Spray Use"
Dec 20, 2012; By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventors Cai, Ying Lin...
Wipo Publishes Patent of Reinhausen Plasma, Stefan Nettesheim, Andreas Albrecht, Johann Menath for "Diaphragm Pump and Method for Delivering Fine-Grain Powder with the Aid of a Diaphragm Pump" (German Inventors)
Oct 25, 2012; GENEVA, Oct. 25 -- Publication No. WO/2012/139898 was published on Oct. 18. Title of the invention: "DIAPHRAGM PUMP AND METHOD...