Patents by Inventor Ivan M. Peytchev

Ivan M. Peytchev 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).

  • Apparatus for the treatment and casting of metals and alloys in a closed space
    Patent number: 4616808
    Abstract: A method in which the melt is first treated with solid alloying additives and an alloying gas, and then the casting operation is effected. There is produced a differential between the pressures in the space for additional saturation with alloying gas and in the space where the casting takes place.An apparatus for practicing the above method comprising an induction furnace in a first hermetic chamber, and a second hermetic chamber inside which there is mounted a casting mold. The induction furnace and the first hermetic chamber are interconnected with the second hermetic chamber via a movable launder. Above the one end of the movable launder there is mounted a siphon, underneath its other end there is disposed an tundish, which is mounted inside the first hermetic chamber and is gas-tightly sealed against a separating plate, attached to the second hermetic chamber containing the casting mold. The tundish is provided with a bottom for blowing-through with alloying gas.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: October 14, 1986
    Assignee: Institute po Metaloznanie i Technologia na Metalite
    Inventors: Ivan D. Nikolov, deceased, by Vassilka P. Dimova, heir, Dobromir I. Dimov, heir, Petar I. Dimov, heir, Marin I. Marinov, Ivan M. Peytchev, Tzolo V. Rashev, Iliya G. Tchorbov