Patents by Inventor Anatoly Nikolaevich Koltunov

Anatoly Nikolaevich Koltunov 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).

  • Superfine oil cleaning filter
    Patent number: 5895568
    Abstract: Proposed herein is a superfine oil cleaning filter, comprising a casing joined together with a cover, an antidrain valve, a filter element, a relief valve with a coarse-cleaning filter element, and a spring, the coarse-cleaning filter element being positioned upstream of the filter element and the relief valve in the space confined within the internal surface of the casing and the external surface of the filter element and of the filter cover. Depending on operating conditions the coarse-cleaning filter element either may be provided with a safety valve or be made up of two components one of which is positioned upstream of the filter element, and the other is located upstream of the relief valve.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: April 20, 1999
    Assignee: Poltavskoe Chastnoe Nauchno-Tekhnicheskoe Predpriyatie
    Inventor: Anatoly Nikolaevich Koltunov