Patents by Inventor David Mikhailovich Angorin

David Mikhailovich Angorin 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).

  • Well pumping equipment
    Patent number: 6135732
    Abstract: A well pumping equipment comprises a pump (1) with an electric motor (2), each having its body suitable for location in a well using a tubing (3), a frequency converter (4) electrically coupled by a cable (5) to the electric motor (2) and including a rectifier (6) and inverter (7). The inverter (7) is adapted to be located in the well and is connected to the rectifier (6) by a single-conductor cable (5), while the other single-conductor connection line to supply power to the electric motor (2) and the inverter (7) is the electric connection of the motor (2) and inverter (7) bodies with the tubing (3).
    Type: Grant
    Filed: December 11, 1998
    Date of Patent: October 24, 2000
    Assignee: Otkrytoe Aktsionernoe Obschestvo "Almetevski Nasosnyi Zavod"
    Inventor: David Mikhailovich Angorin