Patents by Inventor Alexandr G. Krichevsky

Alexandr G. Krichevsky 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).

  • Electromagnetic vibrator
    Patent number: 4788968
    Abstract: Disclosure is made of an electromagnetic vibrator comprising a housing (1) having a cover (6), which accommodates a striker (2) and an excitation coil (3) producing an alternating magnetic field which makes the striker (2) reciprocate along the geometrical axis of the excitation coil (3), the striker (2) being arranged freely in the housing (1) and comprising a permanent magnet (4) having an end surface in a plane parallel to a base (5) of the excitation coil (3) which is located, when the magnetic field of the excitation coil (3) and the magnetic field of the permanent magnet (4) are interacting, at a distance from the base (5) of the excitation coil (3), which is equal to 0.6-0.7 of the height of the excitation coil (3).
    Type: Grant
    Filed: March 11, 1987
    Date of Patent: December 6, 1988
    Assignee: Institute Mashinovedeniya imeni Blagonravova A.A. AN USSR
    Inventors: German E. Rudashevsky, Alexandr G. Krichevsky, Olga G. Blokhina, Alexandr S. Mirkin