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Ultrasonic MHz oscillator, in particular for liquid atomization

  • US 4,912,357 A
  • Filed: 09/19/1988
  • Issued: 03/27/1990
  • Est. Priority Date: 05/20/1986
  • Status: Expired due to Fees
First Claim
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1. An ultrasonic MHz oscillator for operation in the range from approximately 1 MHz to 5 MHz and operating in a power range of ≦

  • 30 watts, for the atomization of a dosed amount of liquid into an aerosol spray inhalable into the human lung, comprising a piezoceramic, a metal amplitude transformer having a concavely curved plate, said amplitude transformer comprising an upwardly tapering amplitude transformer which comprises at an upper widening end a continuous concave surface without an opening in said surface adapted to the dosed liquid quantity to be atomized and liquid surface tension, said concave surface comprising a concave mirror for receiving the dosed liquid quantity to be atomized, and further comprising at a lower end, said piezoceramic comprising a planar piezoceramic disk, said piezoceramic disk being operated without a counter-mass on a side of said piezoceramic disk opposite said amplitude transformer, the total height of the ultrasonic atomizer being 4 to 6 times the half wavelength of the amplitude transformer and the total height of the amplitude transformer to the diameter of the piezoceramic being in the ratio of 1;

    2.

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