Patents by Inventor Semen Abramovich Vigdorchik

Semen Abramovich Vigdorchik 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: 4023225
    Abstract: A method of fabricating headed-shank parts from high-strength two-phase titanium alloys characterized by using an oxalate coating capable of forming a fine-crystalline salt film, cold shaping the shank by reduction, and simultaneous heading and rolling the shank and the radius under the head. The shank is reduced and headed at a speed of 0.5 - 1.0 m/s. The use of the oxalate coating and of the cold-shaping speeds within the above-mentioned limits has made it possible to use automatic cold-heading machines thus raising the productivity of the process 20 - 30 times and producing parts of a higher quality. The method can be widely used for making such parts as rivets, bolts, screws, rivet-bolts and core rivets.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: May 17, 1977
    Inventors: Anatoly Andreevich Tochilkin, Vladilen Filippovich Pshirkov, Semen Abramovich Vigdorchik, Igor Andreevich Vorobiev, Viktor Grigorievich Petrikov, Alexandr Andreevich Kastosov