Patents by Inventor Andrew Ruhman

Andrew Ruhman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Device for transferring ultrasonic energy into a liquid or pasty medium
    Patent number: 5994818
    Abstract: A device (10) for transferring ultrasonic energy into a liquid or pasty medium, the device consisting of the following functional elements: a) an AC generator (35) designed for frequencies between 1 kHz and 100 kHz, b) a magnetostrictive or piezoelectric transducer (20) controlled by the output voltage of the AC generator to execute high-frequency (longitudinal) mechanical oscillations, c) a cylindrical waveguide (23) which is excited by the transducer to execute longitudinal resonant oscillations and d) a tubular cavity resonator (24) which is acoustically coupled to the waveguide and which converts the longitudinal resonant oscillations into oscillations transverse to its longitudinal axis (26'), the oscillation energy of the resonator being transferred into the medium (11) which is to be exposed to the ultrasonic energy. The cavity resonator (24) is designed so that the resonance condition is fulfilled for both longitudinal and transverse natural oscillations of its case (36).
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: November 30, 1999
    Assignee: Tech Sonic Gesellschaft Fur Ultraschall-Technologie m.b.H.
    Inventors: Vladimir Abramov, Vyacheslav Alenichev, Leonid Makarov, Andrew Ruhman