Apparatus and method for removing fine particles from a liquid medium by ultrasonic waves
Patent 4055491 Issued on October 25, 1977. Estimated Expiration Date: 
October 25, 1994. 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.
October 25, 1994. 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 2514471 2907455 3305481 3489679 3499437 3511380 3782547 3898164 InventorApplicationNo. 05/691982 filed on 06/02/1976US Classes:210/738, Including agitation209/5, Deflocculation and flocculation210/513, GRAVITATIONAL SEPARATOR210/521, Superposed compartments or baffles, e.g., parallel plate type210/748, Utilizing electrical or wave energy (directly applied to liquid or material being treated)47/1.4ALGAE CULTUREExaminersPrimary: Scovronek, JosephAttorney, Agent or FirmAbstractApparatus and method are described for using ultrasonic waves for removing microscopic particles from a liquid medium, such as algae from a solar or refuse pond, or blood cells from blood. The described apparatus includes an ultrasonic generator propagating ultrasonic waves of over one megacycle per second through the liquid medium to cause the flocculation of the microscopic particles at spaced points. In two described embodiments, the ultrasonic waves are propagated in the horizontal direction through the liquid medium, and baffle plates are disposed below the level of propagation of the ultrasonic waves. The baffles are oriented to provide a high resistance to the horizontal propagation therethrough of the ultrasonic waves and a low-resistance to the vertical settling therethrough of the flocculated particles. The ultrasonic generator is periodically energized to flocculate the particles, and then de-energized to permit the settling of the flocculated particles through the baffle plates from whence they are removed. | |
