Title:
PIEZOELECTRIC PUMP
Document Type and Number:
WIPO Patent Application WO/2010/035862
Kind Code:
A1
Abstract:
A piezoelectric pump capable of surely discharging a gas and surely delivering a liquid even if driven intermittently.
The piezoelectric pump (101) comprises a piezoelectric oscillator (65), a diaphragm (64) bent and deformed by the piezoelectric oscillator (65), a pump chamber (52) having one wall surface formed of the diaphragm (64), an inlet (51) through which a liquid, a gas, or the mixture thereof flows into the pump chamber (52), an outlet (53) through which the fluid is discharged from the pump chamber, and a liquid holding member (56) for forming the gap between liquid holding member and the inner surface of the pump chamber (52) and holding the liquid in the gap by capillarity or surface tension. A groove (59) for a flow passage is formed in a flow passage plate (62).
Inventors:
KAWAMURA KENICHIRO (JP)
MIYAMOTO MASAYUKI (JP)
MIYAMOTO MASAYUKI (JP)
Application Number:
PCT/JP2009/066901
Publication Date:
April 01, 2010
Filing Date:
September 29, 2009
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
KAWAMURA KENICHIRO (JP)
MIYAMOTO MASAYUKI (JP)
KAWAMURA KENICHIRO (JP)
MIYAMOTO MASAYUKI (JP)
International Classes:
F04B43/04; F04B45/047
Foreign References:
| JP2008163902A | 2008-07-17 | |||
| JP3948493B2 | 2007-07-25 | |||
| JPH0331589A | 1991-02-12 | |||
| JP2008163902A | 2008-07-17 |
Other References:
See also references of EP 2343456A4
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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