Patents by Inventor Ion Lari

Ion Lari 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).

  • Tool joint for drill pipes
    Patent number: 4002359
    Abstract: The invention relates to a tool joint for drill pipes.According to the invention the tool joint consists of a threaded sleeve having an internal cylindrical recess, a pin 2 is threaded into the sleeve and has an internal cylindrical recess b, in which a convergent-divergent nipple 3 is pressure fitted, said nipple resisting the bending moments arising in the threaded joint and in the two critical zones of the drill pipe. The nipple permits self-balancing of said bending moments and the reduction and equalization of their values across each contact face of the nipple ends.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: January 11, 1977
    Assignee: Institutul de Cercetari si Proiectari de Petrol si Gaze
    Inventor: Ion Lari