Pump

Details Pump Pump

2006-06-13

2006-06-13

Koczo, Jr., Michael (Department: 3746)

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

C417S413200, C417S557000

Reexamination Certificate

active

07059836

ABSTRACT:
The invention provides a pump which has reduced pressure loss by using fewer mechanical on-off valves, which has increased reliability, which can be used under a high load pressure, which can be driven at a high frequency, and which has good drive efficiency by increasing discharge fluid volume per pumping period. A circular diaphragm, disposed at the bottom portion of a case, has its outer peripheral edge secured to and supported by the case. A piezoelectric device to move the diaphragm is disposed at the bottom surface of the diaphragm. A space between the diaphragm and the top wall of the case is a pump chamber. An inlet flow path, having a check valve serving as a fluid resistor disposed thereat, and an outlet flow path, which opens to the pump chamber during operation of the pump, open towards the pump chamber. In the pump, driving of the piezoelectric device is controlled so that an average displacement velocity in a pump chamber volume reducing step of the diaphragm becomes a velocity at which the diaphragm reaches the reached-displacement-position in a time equal to or less than ½ and equal to or greater than 1/10 of a natural vibration period T of fluid inside the pump chamber and the outlet flow path.

REFERENCES:
patent: 5769608 (1998-06-01), Seale
patent: 6074178 (2000-06-01), Bishop et al.
patent: 6104127 (2000-08-01), Kameyama et al.
patent: 6109889 (2000-08-01), Zengerle et al.
patent: 6203291 (2001-03-01), Stemme et al.
patent: 6227809 (2001-05-01), Forster et al.
patent: 6280148 (2001-08-01), Zengerle et al.
patent: 6604909 (2003-08-01), Schoenmeyr
patent: 6623256 (2003-09-01), Takagi et al.
patent: 6716002 (2004-04-01), Higashino
patent: 2002/0009374 (2002-01-01), Higashino
patent: 25 19 962 (1976-11-01), None
patent: 44 22 743 (1996-01-01), None
patent: 197 06 513 (1998-08-01), None
patent: 197 11 270 (1998-09-01), None
patent: 0 844 395 (1998-05-01), None
patent: 0 844 478 (1998-05-01), None
patent: 1 236 900 (2002-09-01), None
patent: 741015 (1955-11-01), None
patent: A 8-506874 (1996-07-01), None
patent: A 8-312537 (1996-11-01), None
patent: A 10-220357 (1998-08-01), None
N.T. Nguyen et al.; “Hybrid-assembled micro dosing system using silicon-based micropump/valve and mass flow sensor”; Sensors and Actuators A 69; 1998; pp. 85-91.
Nam-Trung Nguyen et al.; “Integrated flow sensor for in situ measurement and control of acoustic streaming in flexural plate wave micropumps”; Sensors and Acutuators 79; 2000; pp. 115-121.
Olsson et al., An Improved Valve-Less Pump Fabricated Using Deep Reactive Ion Etching, 1996, IEEE, 479-484.

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