Patents by Inventor Frederic Lechere

Frederic Lechere 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: 9284879
    Abstract: A piston for an internal combustion engine, including a body configured to collaborate with walls of a cylinder of axis of revolution C in which the piston is configured to slide along the axis C. The piston includes a transverse face including a central pip, a peripheral ring, and a bowl of axis of revolution B extending from the central pip towards the peripheral ring to which it connects at a lip. The bowl includes, in substantial vertical alignment with the lip, a torus in profile, of maximum radius capable of guiding fuel injected under the lip in a region of a re-entrant zone towards the central pip. The tip of the pip lying on the axis of revolution B of the bowl rises to a height that is a distance of between 4.8 mm and 5.5 mm, or equal to 5.4 mm, below the level of the peripheral ring.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: March 15, 2016
    Assignee: RENAULT S.A.S.
    Inventors: Mickael Dingreville, Frederic Lavoisier, Frederic Lechere
  • Publication number: 20110041794
    Abstract: A piston for an internal combustion engine, for example a diesel engine, including a body delimited laterally by a skirt and configured to collaborate with walls of a cylinder of axis of revolution C in which the piston is configured to slide along the axis C. The piston includes a transverse face including a central pip, a peripheral ring, and a bowl of axis of revolution B extending from the central pip towards the peripheral ring to which it connects at a lip. The bowl includes, in substantial vertical alignment with the lip, a torus in profile, for example dome-shaped, of maximum radius capable of guiding fuel injected under the lip in a region of a re-entrant zone towards the central pip. The tip of the pip lying on the axis of revolution B of the bowl rises to a height that is a distance of between 4.8 mm and 5.5 mm, or equal to 5.4 mm, below the level of the peripheral ring.
    Type: Application
    Filed: December 15, 2008
    Publication date: February 24, 2011
    Applicant: RENAULT S.A.S.
    Inventors: Mickael Dingreville, Frederic Lavoisier, Frederic Lechere