Patents by Inventor Voldemar V. Apsit

Voldemar V. Apsit 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).

  • Patent number: 4276832
    Abstract: A transportation device with an electrodynamic suspension comprises a motor system, a suspension system, and a transverse stabilization system, the systems being provided with field coils of the motor, levitation and transverse stabilization, arranged on a vehicle, and a single-layer three-phase armature winding mounted horizontally along a track bed. The armature winding consists of active portions of turns formed as plates up to one third of the pole pitch of the armature winding in width, and end portions formed in two layers and made as rectangular plates mounted parallel to the track axis. The end portions of the three-phase armature winding are used as reactive buses or conveyors of transverse stabilization. At least one layer of the end portions is mounted parallel to the planes of the field coils of transverse stabilization.
    Type: Grant
    Filed: December 12, 1978
    Date of Patent: July 7, 1981
    Inventors: Zigurd K. Sika, Voldemar V. Apsit, Khubert L. Daugulis, Ivan I. Kurkalov
  • Patent number: 4131811
    Abstract: Disclosure is made of a traction means with electrodynamic suspension of a ehicle, intended for high-speed land transport and comprising a synchronous linear motor whose exciting winding is mounted on the vehicle and at the same time serves as the exciting winding for electrodynamic suspension of the vehicle, whereas the three-phase armature winding of said synchronous linear motor extends horizontally along the track and is a single-layer winding with one turn for the pole and phase. In the active area, the conductors of the armature winding are made as strips parallel to the track plane and having a width up to one third of the pole pitch. The exciting winding induces eddy currents in said strips on the side of the vehicle, which eddy currents ensure electrodynamic suspension of the vehicle. Traction means of this type can be used in the future in high-speed urban and suburban transport.
    Type: Grant
    Filed: June 28, 1977
    Date of Patent: December 26, 1978
    Assignee: Fiziko-Energetichesky Institut Akademii Nauk Latviiskoi SSR
    Inventors: Voldemar V. Apsit, Zigurd K. Sika, Ivan I. Kurkalov