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| Patents |
| Inventor: Charles S. Irwin |
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| Ultrasonic horn assembly |
| Patent number: 4607185 PDF |
| Abstract: An ultrasonic horn assembly, particularly suitable for dissolving reagent tablets in a liquid solution in a cuvette which is moved along a path next to the front end face of the horn, includes a generally cylindrical converter fixed to a rear end face of the horn body substantially medial of the length of the rear end face. A pair of elongate resonating members are each fixed at one end to a different side end region of the rear end face on the horn body, and extend perpendicularly from the rear end face. The resonating members cause acoustic waves to propagate from the front end face of the horn body at substantially uniform amplitude along the length of the front end face, so that objects such as cuvettes moving parallel to the front end face are continuously subjected to uniform acoustic waves to insure a thorough dissolving or mixing operation. |
| Type: Grant |
| Filed: February 1, 1985 |
| Date of Patent: August 19, 1986 |
| Assignee: American Hospital Supply Corporation |
| Inventors: Lawrence E. Elbert, Charles S. Irwin |
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| Ultrasonic cleaning apparatus |
| Patent number: 4501285 PDF |
| Abstract: Ultrasonic transducer apparatus for cleaning applications and method for cleaning wafers of semiconductor material in which the method includes positioning the wafer proximate to but closely spaced away from a cleansing face of the ultrasonic transducer, supplying space between the cleansing face and the wafer with a cleansing fluid through an orifice in the cleansing surface and ultrasonically vibrating the cleansing face transversely to the wafer by applying an electrical signal to piezoelectric material symmetrically disposed about the orifice in the cleansing face via which the cleansing fluid is supplied, with the ultrasonic transducer including piezoelectric material symmetrically disposed with respect to the orifice in the cleansing face through which the cleansing fluid is supplied. |
| Type: Grant |
| Filed: April 5, 1982 |
| Date of Patent: February 26, 1985 |
| Assignee: Sonobond Ultrasonics, Inc. |
| Inventors: Charles Irwin, Janet Devine, Richard Kramer |
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