Manipulating particulate matter
Patent 4877516 Issued on October 31, 1989. Estimated Expiration Date: 
January 27, 2008. 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.
January 27, 2008. 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 3826740 Apparatus and method for removing fine particles from a liquid medium by ultrasonic waves Acoustic particle separation Methods and apparatus for moving and separating materials exhibiting different physical properties Patent #: 4759775 InventorAssigneeApplicationNo. 153833 filed on 01/27/1988US Classes:209/155, Liquid209/2, SPECIAL APPLICATIONS209/20, Gaseous suspension and stratifying209/210, With deflection209/590, Sonic or supersonic energy210/748Utilizing electrical or wave energy (directly applied to liquid or material being treated)ExaminersPrimary: Rolla, Joseph J.Attorney, Agent or FirmForeign Patent References
International ClassB03B 003/02Foreign Application Priority Data1986-05-27 GBAbstractAn acoustic standing wave is established in a fluid medium with a varying energy density in its nodal planes. Particles in the fluid medium responsive to the acoustic energy accumulate at these nodal planes and by the action of the variations of energy density in conjunction with the fluid viscous forces and/or field forces acting in the direction of the nodal planes, the movement of the particles held at these planes can be controlled. The adverse effects of attenuation of the acoustic beams producing the standing wave are reduced in this system, because any streaming due to imbalance of the acoustic forces forming the standing wave does not act in the direction in which the movement of the particles can be controlled.Other References
Field of SearchAcoustic emissionAcoustical impedance Acoustic parameter Amplitude, power, or intensity Current generating or modifying Utilizing electrical or wave energy (directly applied to liquid or material being treated) Separating SPECIAL APPLICATIONS Aqueous suspension and stratifying Gaseous suspension and stratifying Including sorting of special items or sorting by methods or apparatus includible in subclasses 509 through 707 Gaseous Horizontal current With deposition Grading deposition Current control Liquid Water or aqueous solution Grading deposition With deflection Sonic or supersonic energy | |
