Patents by Inventor Petr V. Dobroselsky

Petr V. Dobroselsky 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 drilling holes in the ground
    Patent number: 5133416
    Abstract: The device for drilling holes in the ground comprises a body (1), a drive and a base member (3), connected with the body by means of a thread (4) and provided a with a lug (7) located on an external side surface (6). The lug (7) is intended for locking the base member (3) relative to the body (1) and is projected beyond the latter. One of the sides (10) is inclined to the generatrix of the side surface (6) of the base member (3) in the direction creating a turning-in moment at the connecting thread. Located on the base member side surface is an additional lug (12) which creates a turning-in moment at the connecting thread in case the device is reversed.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: July 28, 1992
    Inventors: Petr V. Dobroselsky, Igor V. Nikolaev