Patents by Inventor Edgar H. Haehner

Edgar H. Haehner 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).

  • Method and device for measuring the torque transmitted by a shaft subjected to temperature variations
    Patent number: 4774845
    Abstract: According to this method the linear expansion (.DELTA.L) of a reference shaft is measured with reference to that of the power shaft. The linear expansion of the reference shaft (R.sub.3) is converted into a movement of rotation of an annular phonic wheel (B.sub.3) by means of the free end (J) of this shaft engaged in a helical groove in the inner surface of the annular wheel (B.sub.3).
    Type: Grant
    Filed: August 26, 1986
    Date of Patent: October 4, 1988
    Assignee: Turbomeca
    Inventors: Roger H. L. Barbe, Alain M. Dufau, Edgar H. Haehner