Method of driving pump

Details Method of driving pump Method of driving pump

2006-10-17

2006-10-17

Koczo, Jr., Michael (Department: 3746)

Pumps

Processes

C417S413200, C417S557000

Reexamination Certificate

active

07121809

ABSTRACT:
A pump is provided having a pump chamber that is capable of changing a volume thereof by a diaphragm, an inlet passage permitting an operating fluid to flow into the pump chamber; an outlet passage permitting an operating fluid to flow out from the pump chamber; and a check valve provided on the inlet passage. An inertance value of the inlet passage is smaller than the inertance value of the outlet passage. The diaphragm is driven by a frequency f (Hz) satisfying the following formula:f≥0.26X⁢L⁢⁢Swherein the inertance value of the outlet passage is L (kg/m4), the displacement from an upper end point to a bottom end point of the diaphragm is X (m), and the cross section area of the pump chamber is S (m2).

REFERENCES:
patent: 6623256 (2003-09-01), Takagi et al.
patent: 7011507 (2006-03-01), Seto et al.
patent: 2003/0215342 (2003-11-01), Higashino et al.
patent: 2004/0013539 (2004-01-01), Takagi et al.
patent: 2004/0018100 (2004-01-01), Takagi et al.
Yoshida et al, “Simulation of Micropump Using Inertia Effect of Fluid” (Japanese original document, 2 pages and English translation, 3 pages).

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