Patents by Inventor Leonid Georgievich Rozhkov

Leonid Georgievich Rozhkov 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).

  • Pneumatic impact devices
    Patent number: 4070948
    Abstract: The present invention relates to pneumatic impact devices and can be used to the best advantage for making holes in compacted soils.The device is provided with a hollow casing which accommodates a stepped ram with the maximum-diameter step in its front part. This step has longitudinal channels which open at one end into a working chamber defined by the maximum-diameter step and the side walls of the casing and serving for receiving compressed air from the compressed air line, with the air moving the striker to impart a blow after which it is discharged through holes in the casing.
    Type: Grant
    Filed: November 13, 1975
    Date of Patent: January 31, 1978
    Inventors: Khaim Berkovich Tkach, Alexandr Dmitrievich Kostylev, Konstantin Konstantinovich Tupitsyn, Konstantin Stepanovich Gurkov, Vladimir Vasilievich Klimashko, Leonid Georgievich Rozhkov, Mikhail Jurievich Bondar, Boris Nikolaevich Smolyanitsky
  • Method of making built-in-place reinforced concrete piles
    Patent number: 4063423
    Abstract: Method consisting in forming a borehole in the ground preferably having a diameter smaller than the desired diameter of a pile, compacting a concrete mix poured into the borehole by repeatedly passing a pneumatic mole through the borehole filled with concrete to compact the concrete mix in the peripheral zone of the borehole thereby concurrently expanding the reinforcement.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: December 20, 1977
    Inventors: Konstantin Stepanovich Gurkov, Nikolai Grigorievich Nazarov, Evgeny Nikolaevich Cherednikov, Vladimir Dmitrievich Plavskikh, Leonid Georgievich Rozhkov, Khaim Berkovich Tkach, Vladimir Alexandrovich Grigoraschenko, Alexandr Dmitrievich Kostylev, Vasily Georgievich Davydov, Valentin Alexeevich Zuev
  • Soil sampler
    Patent number: 3955631
    Abstract: The present sampler is adapted to take soil samples from the ground surface, from a borehole sunk by other tools, as well as for drilling shallow boreholes. The sampler is provided with an air-operated percussion mechanism and a soil sample receiving sleeve arranged coaxially thereto. The side surface of the sleeve is provided with an annular ridge having a diameter somewhat larger than the diameter of the percussion mechanism housing. This feature enables a reduction of the forces applied to the sampler to sink it into or withdraw it from the soil.
    Type: Grant
    Filed: August 1, 1974
    Date of Patent: May 11, 1976
    Inventors: Alexandr Dmitrievich Kostylev, Konstantin Stepanovich Gurkov, Leonid Georgievich Rozhkov, Khaim Berkovich Tkach, Evgeny Ivanovich Tanov, Viktor Yakovlevich Ploschadny