Piezoelectrically driven fluids pump and piezoelectric fluid valve
February 14, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3029743 3270672 Micro pump powered by piezoelectric disk benders Peristaltic piezoelectric pump with internal load sensor Apparatus and method for piezoelectric pumping Piezoelectric pump with internal load sensor Piezoelectric actuator and a piezoelectric pump injector incorporating the same Piezo activated pump in an ink liquid supply system Differential thermal expansion driven pump Apparatus for transferring small amount of fluid InventorsAssigneeApplicationNo. 10073953 filed on 02/14/2002US Classes:417/413.2, Piezoelectric driven417/322, Magnetostrictive chamber417/478, Inlet and discharge distributors at opposite ends of tubular flexible wall pumping chamber417/505, Electrically or magnetically actuated distributor251/4, TUBE COMPRESSORS251/7, Perpendicularly reciprocating tube contacting element251/129.06Having element dimensionally responsive to fieldExaminersPrimary: Yu, Justine R.Assistant: Sayoc, Emmanuel Attorney, Agent or FirmInternational ClassF04B017/03AbstractA 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.Other References
Field of SearchMagnetostrictive chamberPiezoelectric driven Inlet and discharge distributors at opposite ends of tubular flexible wall pumping chamber Electrically or magnetically actuated distributor TUBE COMPRESSORS Perpendicularly reciprocating tube contacting element Having element dimensionally responsive to field | |
