Piezoelectric micro-blower

Details Piezoelectric micro-blower Piezoelectric micro-blower

2011-07-05

2011-07-05

Kramer, Devon C (Department: 3746)

Pumps

Motor driven

Electric or magnetic motor

Reexamination Certificate

active

07972124

ABSTRACT:
A blower body is provided with a first wall and a second wall, and openings are provided in the walls at positions facing the approximate center of a diaphragm. An inflow passage that allows the openings to communicate with the outside is arranged between the two walls. When the diaphragm is vibrated in response to a voltage applied to a piezoelectric element, the first wall vibrates near the opening and sucks in air from the inflow passage so that the air can be ejected from the opening. A plurality of branch passages which provide sound absorption are connected to an intermediate section of the inflow passage so as to prevent noise generated near the opening from leaking from an inlet.

REFERENCES:
patent: 4512716 (1985-04-01), McHenry et al.
patent: 7550034 (2009-06-01), Van Rensburg et al.
patent: 2005/0074662 (2005-04-01), Cho et al.
patent: 2006/0201327 (2006-09-01), Van Rensburg et al.
patent: 6-143571 (1994-05-01), None
patent: 2000-87862 (2000-03-01), None
patent: 2005-113918 (2005-04-01), None
patent: 2006-522896 (2006-10-01), None
patent: 2008/069266 (2008-06-01), None
Official Communication issued in International Patent Application No. PCT/JP2008/067236, mailed on Oct. 21, 2008.

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