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US 3,963,380 AGranted
Micro pump powered by piezoelectric disk benders
OwnerLyell J. Thomas, Jr., Samuel P. Bessmaninventors
Life of this patent
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Abstract
The pump has a piezoelectric variable volume chamber and a solenoid controlled valve operated in sequence to pump small volumes of liquid. The sequence is produced by developing a phase difference between the control of the piezoelectrical chamber and the solenoid valve.
Claims11
A pump having an inlet and an outlet comprising:
- a variable volume chamber having a single port and at least one piezeoelectric wall;
- a single solenoid valve for controlling the communication of said port to said inlet and outlet;
- a signal generator;
- and
- a transformer having said solenoid valve and said signal generator connected in series on one side of the transformer and said piezeoelectric wall connected to the other side of the transformer;
- the sequentral operation of said solenoid valve and said piezoelectric wall needed to produce a pumping effect being produced by the electrical characteristics of the transformer, solenoid valve and piezeoelectric wall.
3 more elements
A pump having an inlet and an outlet comprising:
- a chamber means for holding a medium being pumped and having a port;
- a piezoelectric means connected to said chamber means for varying the volume of said chamber means;
- a solenoid valve connected between said inlet, said outlet and said port for controlling the communication of said port with said inlet and said outlet;
- and
- control means connected to said piezoelectric means and said solenoid valve for electrically activating said piezoelectric means and said solenoid valve in a desired sequence to move said medium from said inlet to said chamber means and from said chamber means to said outlet, past said solenoid valve.
2 more elements
Dependencies are inferred from the claim text.