Patent application number | Description | Published |
20080312460 | Multi-Frequency Ultrasonic Apparatus and Process for Producing Biofuels - The present invention is an ultrasonic apparatus and process that utilizes multiple-frequency ultrasonic energy during production of biofuel. The ultrasonic apparatus includes a process tank containing a reactant fluid and at least two groups of ultrasonic transducers coupled to the process tank, wherein each group of transducers generates different frequencies. The process for transesterizing vegetable oils or fatty acids into fatty-acid alkyl esters includes steps of placing a reactant fluid including vegetable oils or fatty acids into the process tank, and applying ultrasonic energy to the reactant fluid in the tank at two separate frequencies in the range of 15 kHz to 1.5 MHz. | 12-18-2008 |
20100012148 | MEGASONIC PROCESSING APPARATUS WITH FREQUENCY SWEEPING OF THICKNESS MODE TRANSDUCERS - A megasonic processing apparatus and method has one or more piezoelectric transducers operating in thickness mode at fundamental resonant frequencies of at least 300 KHz. A generator powers the transducers with a variable-frequency driving signal that varies or sweeps throughout a predetermined sweep frequency range. The generator repeatedly vanes or sweeps the frequency of the driving signal through a sweep frequency range that includes the resonant frequencies of all the transducers. | 01-21-2010 |
20100126942 | MULTI-FREQUENCY ULTRASONIC APPARATUS AND PROCESS WITH EXPOSED TRANSMITTING HEAD - The present invention is an ultrasonic device with the transmitting head located outside a housing enclosure while radial mode PZTs and tail mass are located inside the housing enclosure. The ultrasonic device and related process are useful for any process involving supplying ultrasonic energy to a liquid, including controlling algae and decontaminating liquids with multiple ultrasonic transmitters driven at variable frequencies. A broad range of algae can be successfully controlled and various liquids can be decontaminated or otherwise processed in a rapid and effective way. Each transmitter is housed in an enclosure that can float on the surface of tanks; pools, reservoirs, lakes, ponds, and water and waste-water facilities. Alternatively, the transmitters can be attached to a structure and positioned with the transmitting head immersed into the liquid. The exposed transmitting head efficiently transmits ultrasonic energy to the liquid. | 05-27-2010 |
20110094548 | MEGASONIC MULTIFREQUENCY APPARATUS WITH MATCHED TRANSDUCERS AND MOUNTING PLATE - A megasonic processing apparatus matches the fundamental resonant or higher-level harmonic frequencies of megasonic thickness-mode transducers to the fundamental resonant or higher-level harmonic frequencies of a plate or other mounting structure upon which the transducers are mounted. The multifrequency transducers are piezoelectric transducers operating in thickness mode at different operating frequencies. The thickness of the mounting plate at the transducer locations is selected to provide a resonant or harmonic frequency matched to that of its corresponding transducer. Two or more megasonic transducers are bonded to the same radiating surface. | 04-28-2011 |
20110132575 | Cleaning Industrial Heat Exchangers Through Utilization of Thicknenss Mode Ultrasonics - Methods and apparatuses for cleaning heat exchangers and heat exchanger components utilizing thickness mode ultrasonics. Heat exchanger components are placed in a tank. The tank is filled with cleaning media. One or more thickness mode transducers are placed in the tank and the thickness mode transducers are operated to clean the tank. In further embodiments, one or more thickness mode transducers are integrated within a heat exchanger. The transducers are operated to clean the heat exchanger space and components located therein. | 06-09-2011 |
20110242944 | Unrestricted Mounting of Ultrasonic Transducers - An ultrasonic processing apparatus is disclosed that supports an ultrasonic rod transducer without restricting the transmission of ultrasonic vibrations from the rod transducer to liquid in a processing tank. A support structure supports one or both converter heads of the rod transducer without restricting its vibration. | 10-06-2011 |
20120279531 | ULTRASONIC AIR BLANKET REFLECTOR - An air blanket reflector, which is placed inside and next to the walls of an ultrasonic tank, reflects ultrasonic energy. The air blanket reflector has a relatively thin metal plate, such as 14 gauge stainless steel, facing the interior of the tank and an air-filled cavity on the opposite side of the thin metal plate. The thin metal plate reflects ultrasonic energy away from the walls of the tank to reduce the amount of ultrasonic energy absorbed by the tank. | 11-08-2012 |
20140275587 | ULTRASONIC AND MEGASONIC METHOD FOR EXTRACTING PALM OIL - A process for extracting palm oil includes an ultrasonic horn press and a megasonic clarifier. The ultrasonic horn press uses ultrasonic vibrations to rupture the palm fruit. After pressing and filtering the palm oil from the ultrasonic horn press, the megasonic clarifier applies megasonic vibrations to clarify the palm oil. The ultrasonic horn press and megasonic clarifier significantly reduce the use of water and minimizes pollution as compared to conventional processes. | 09-18-2014 |