Patents by Inventor Marcel Entat

Marcel Entat 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 of producing propeller blades and improved propeller blades obtained by means of this method
    Patent number: 4135858
    Abstract: A propeller blade is rotatable about an axis of rotation and has a leading edge and a trailing edge. The blade has a configuration such that for any fixed point on the leading edge of the blade .gamma. has a maximum value of 90.degree., and for any fixed point on the trailing edge .gamma. has a maximum value of Arc cotg[(tg .beta.).sup.3 ] wherein .gamma. is the angle between a radius extending from the axis of rotation to the fixed point and a vector from the fixed point in the direction of rotation of the blade, the vector lying in a plane which is perpendicular to the axis of rotation and which passes through the fixed point. The vector is normal to a section outline formed by the plane passing through the blade. .beta. is the angle between the plane and the chord of a cylindrical profile or corss-section of the blade formed by an imaginary cylinder concentric to the axis of rotation and passing through the fixed point.
    Type: Grant
    Filed: May 28, 1976
    Date of Patent: January 23, 1979
    Inventor: Marcel Entat