Patents by Inventor Michael Filshtinsky

Michael Filshtinsky 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).

  • Coring device with an improved core sleeve and anti-gripping collar with a collective core catcher
    Patent number: 4566545
    Abstract: An improved coring device that incorporates a nonrotatable inner barrel disposed within the outer driving structure of the drill string which is coupled to the coring bit. A woven metal mesh sleeve is circumferentially mounted outside the inner barrel and tucked around its lower end. The lower end of the mesh sleeve in the inner barrel is in turn connected to a stripper tube which is pulled upwardly during the coring operation. As the core is cut by the coring bit and enters the inner barrel, the woven metal mesh sleeve is disposed about the core and constricts about the core when pulled upwardly by the stripper tube. The opposing end of the woven metal mesh sleeve is under a weight which serves to compress the metal sleeve when outside the inner barrel, thereby increasing its diameter.
    Type: Grant
    Filed: September 29, 1983
    Date of Patent: January 28, 1986
    Assignee: Norton Christensen, Inc.
    Inventors: Arthur L. Story, Michael Filshtinsky
  • Coring device with an improved weighted core sleeve and anti-gripping collar
    Patent number: 4512423
    Abstract: An improved coring device that incorporates a nonrotatable inner barrel disposed within the outer driving structure of the drill string which is coupled to a coring bit. A woven metal mesh sleeve is circumferentially mounted outside the inner barrel and tucked around its lower end. The lower end of the mesh sleeve in the inner barrel is in turn connected to a stripper tube which is pulled upwardly during the coring operation. As the core is cut by the coring bit and enters the inner barrel, the woven metal mesh sleeve is disposed about the core and constricts about the core when pulled upwardly by the stripper tube. The opposing end of the woven metal mesh sleeve is connected to a weight which serves to compress the metal sleeve when outside the inner barrel, thereby increasing its diameter to prevent binding or jamming.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: April 23, 1985
    Assignee: Christensen, Inc.
    Inventors: James T. Aumann, Michael Filshtinsky