Patents by Inventor Benoit Le Chevalier

Benoit Le Chevalier 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).

  • Tubular threaded joint
    Patent number: 7823931
    Abstract: A tubular threaded joint which has excellent resistance to compression and which permits easy tightening operation in the field in a vertical state comprises a pin having a male threaded zone and a box having a female threaded zone. The pin or the box has an end shoulder surface on its end, and the other member has a shoulder surface which abuts against the end shoulder surface. The screw threads of the male threaded zone and the female threaded zone are trapezoidal threads having a crest, a load flank, and a stabbing flank. The lip length, which is the distance in the axial direction of a member having an end shoulder surface between the end shoulder surface and the closest engaged thread to that surface, is at least 140 times the stabbing flank clearance, which is the distance in the axial direction between the stabbing flanks of the male thread and the female thread when the load flanks of the male and female threads contact each other. The stabbing flank of the male thread is preferably chamfered.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: November 2, 2010
    Assignees: Sumitomo Metal Industries, Ltd., Vallourec Mannesmann Oil & Gas France
    Inventors: Takahiro Hamamoto, Katsutoshi Sumitani, Masaaki Sugino, Michihiko Iwamoto, Miyuki Yamamoto, Jean-Francois Charvet-Quemin, Benoit Le Chevalier, Eric Verger
  • Tubular threaded joint
    Publication number: 20090200798
    Abstract: A tubular threaded joint which has excellent resistance to compression and which permits easy tightening operation in the field in a vertical state comprises a pin having a male threaded zone and a box having a female threaded zone. The pin or the box has an end shoulder surface on its end, and the other member has a shoulder surface which abuts against the end shoulder surface. The screw threads of the male threaded zone and the female threaded zone are trapezoidal threads having a crest, a load flank, and a stabbing flank. The lip length, which is the distance in the axial direction of a member having an end shoulder surface between the end shoulder surface and the closest engaged thread to that surface, is at least 140 times the stabbing flank clearance, which is the distance in the axial direction between the stabbing flanks of the male thread and the female thread when the load flanks of the male and female threads contact each other. The stabbing flank of the male thread is preferably chamfered.
    Type: Application
    Filed: September 16, 2008
    Publication date: August 13, 2009
    Inventors: Takahiro Hamamoto, Katsutoshi Sumitani, Masaaki Sugino, Michihiko Iwamoto, Miyuki Yamamoto, Jean-Francois Charvet-Quemin, Benoit Le Chevalier, Eric Verger