Patents by Inventor Pascal Lesage

Pascal Lesage 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).

  • Device to determine the coefficient of the hydric expansion of the elements of a composite structure
    Patent number: 5134891
    Abstract: So as to determine the coefficient of hydric expansion .beta. of the elements of a composite structure, a sample of this structure is placed in a rigid cradle (10) so that one extremity of the sample is rigidly maintained and that the length variations of the sample are measured by a displacement transducer (12) borne by the cradle. The transducer (12) is preferably a linear differential transformer contact transducer and it is kept under constant humidity by injecting dry air through a flexible tube (60, 64) connected to its rear section. By placing the cradle (10) bearing the sample in a climatic chamber (40), whose humidity is made to vary at a constant temperature, and by at the same time measuring the weight of the sample, it is possible to determine the coefficient .beta..
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: August 4, 1992
    Assignee: Societe Nationale Industrielle et Aerospatiale
    Inventors: Maurice Canevet, Pascal Lesage