Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
2005-03-22
2005-03-22
Yu, Juntine R. (Department: 3746)
Pumps
Motor driven
Electric or magnetic motor
C417S322000, C417S478000, C417S505000, C417S413200, C251S004000, C251S007000, C251S129060
Reexamination Certificate
active
06869275
ABSTRACT:
A piezoelectrically driven fluid pump includes a chamber having two opposite sidewalls formed by flexible membranes, and an inlet and an outlet each regulated by a valve. Separate piezo elements are fixed to each of the membranes, to flex the membranes and increase or reduce the chamber volume and thereby draw fluid into the chamber or expel fluid from the chamber. The valves are each formed by two adjacent piezo elements that are supported or flexibly joined together at two opposite ends. When actuated, the valve piezo elements flex outward between the two opposite ends, opening the valve to form an aperture between the two piezo elements. In another embodiment, a fluid pump includes a chamber having one flexible membrane sidewall. A valve-regulated inlet or outlet aperture through the membrane communicates with the pump chamber. A ring-shaped piezo centered around the aperture, on the membrane, flexes the membrane.
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Notification of Transmittal of International Preliminary Examination Report for PCT/US03/02747 dated May 25, 2004.
Alonso Hector
Dante Henry M.
Lilly, Jr. A. Clifton
Burns Doane , Swecker, Mathis LLP
Philip Morris USA Inc.
Sayoc Emmanuel
Yu Juntine R.
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