Patent ID: 6206644
Filing Date: 2001-03-27
Classification: F04B

Abstract:
A dual pump for pumping a first fluid and a second fluid independently, comprising:a pump body, including:(a) a first concave depression on a first side of said pump body;(b) a first inlet fluid port and a first outlet fluid port in fluid communication with said first depression;(c) a second concave depression on a second side of said pump body opposite said first depression; and(d) a second inlet fluid port and a second outlet fluid port in fluid communication with said second depression;a first diaphragm coupled to said first side of said pump body and enclosing said first depression to form a first inner chamber;a second diaphragm coupled to said second side of said pump body and enclosing said second depression to form a second inner chamber;a shell enclosing said pump body on said first and second sides of said pump body, said shell defining a first outer chamber with said first diaphragm in pressure communication with said first inner chamber and defining a second outer chamber with said second diaphragm in pressure communication with said second inner chamber;a first pressure port in said shell providing a first pressure passage to said first outer chamber; anda second pressure port in said shell providing a second pressure passage to said second outer chamber.