Patents by Inventor Dimiter V. Tsvetkov

Dimiter V. Tsvetkov 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: 4997468
    Abstract: The method for decorative processing is performed with repetitively pulsed cross discharge at atmospheric pressure by CO.sub.2 -laser with pulse energy 1 to 5J, power density at operation from 1.10.sup.6 W/cm.sup.2 to 6.10.sup.7 W/cm.sup.2, pulse duration from 50 to 100 ns and average power 1 to 1000W whereby the mated area with one shot is from 0.5 to 2 cm.sup.2.The device for laser engraving comprises a base with mounted console, on which are fastened parallel elements and a screw that is seated in its upper end in a thrust and in its lower end it is linked by a hinge to an electric motor. There is a fork which is seated in parallel elements whereby to this fork by means of handle and fixator is fastened a slide with longitudinal channels and a plate for axial inclination per 15.degree.. To this slide is fastened a second electric motor, and on its axis is mounted a bearer on which is fastened a mask in which is fixed the item to be decorated.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: March 5, 1991
    Assignee: PU "Paissii Hilendarski"
    Inventors: Dimiter A. Dimitrov, Mincho S. Dakov, Dancho T. Tonchev, Hristo A. Kalafirov, Todor S. Botev, Krassimir E. Shterev, Vladimir S. Kojuharov, Yordan I. Dimitrov, Dimiter V. Tsvetkov