Patent ID: 6561774
Filing Date: 2003-05-13
Classification: F04B

Abstract:
A pump for pumping a supercritical fluid comprising:a. a first chamber comprising a first cavity and a first diaphragm, the first chamber coupled to a pump inlet and a pump outlet; b. a second chamber comprising a second cavity and a second diaphragm, the second chamber coupled to the pump inlet and the pump outlet; c. a mechanical link coupling the first diaphragm of the first chamber to the second diaphragm of the second chamber; and d. a drive mechanism coupled to the mechanical link, wherein the drive mechanism drives the mechanical link to actuate the first diaphragm and the second diaphragm in opposing directions, wherein the mechanical link directly applies a force to the first diaphragm and the second diaphragm such that the force drives the first diaphragm, thereby causing supercritical fluid within the first cavity to exit the pump outlet while causing supercritical fluid to be drawn from the pump inlet into the second cavity and further such that in operation the mechanical link imparts an inlet pressure force from the second diaphragm to the first diaphragm.