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Motion imparting deviceMotion imparting device description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080193307, Motion imparting device. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION
The invention relates to a novel method and device for imparting motion to fluids and solids at arbitrary rates with high efficiency. BACKGROUND OF THE INVENTIONMicro-pump devices are essential building blocks in MEMS and BIO-MEMS technology. Many state-of-the-art micro-pump devices are based on a deformable element (e.g., plate or membrane) that vibrates periodically. The deflections of the deformable element are utilized to induce motion in confined fluids, often with the assistance of valves. To ensure sufficiently large deflections, these devices are operated at the resonance frequency of the system. In other operation frequencies, the achievable deformation is much lower, and much of the supplied power is invested in deforming the structure. Furthermore, in the current state-of-the-art methods, achieving high pressure requires the use of a series of separate pumping chambers that successively increase the fluid pressure. This is due to the limitations on pressure increase attainable in each pumping chamber. BRIEF DESCRIPTION OF THE INVENTIONThere is thus provided, in accordance with some preferred embodiments of the present invention, a device for inducing motion on fluids or solids, the device comprising: a structure with a deformable sheet compressed to form a structural wave; and a actuator for actuating the deformable sheet and driving the structural wave in a predetermined manner. Furthermore, in accordance with some preferred embodiments of the present invention, the deformable sheet is a deformable plate, peripherally supported by a frame. Furthermore, in accordance with some preferred embodiments of the present invention, the deformable sheet is a beam. Furthermore, in accordance with some preferred embodiments of the present invention, the beam is coupled to an elastic foundation. Furthermore, in accordance with some preferred embodiments of the present invention, a first wall is provided against the deformable sheet so as to define a first conduit between the first wall and the deformable sheet. Furthermore, in accordance with some preferred embodiments of the present invention, the first conduit is provided with an inlet and an outlet. Furthermore, in accordance with some preferred embodiments of the present invention, the device is further provided with a second wall positioned opposite the first wall, with the deformable sheet between the walls, the second wall defining a second conduit between the second wall and the deformable sheet. Furthermore, in accordance with some preferred embodiments of the present invention, the second conduit is provided with an inlet and an outlet. Furthermore, in accordance with some preferred embodiments of the present invention, the actuator is selected from the group including: electrostatic actuators, piezoelectric actuators, thermoelastic actuators and magnetic actuators. Furthermore, in accordance with some preferred embodiments of the present invention, some or all of the device is made from silicon. Furthermore, in accordance with some preferred embodiments of the present invention, there is provided a method for inducing motion on fluids or solids, the method comprising: providing a structure with a deformable sheet formed to present a structural wave,
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