Patents by Inventor Edward H. Leszak

Edward H. Leszak 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).

  • Process for modifying capillary grooves
    Patent number: 4004441
    Abstract: The process of passing a rotating tool through a tubular workpiece such as a heat pipe having longitudinal capillary grooves in the walls thereof such that a swaging ball carried by the tool flattens the lands between the grooves to thereby produce a capillary configuration in which the width of the opening of the grooves is narrower than a cross-section of the groove and the lands between the grooves have a mushroom-shaped cross-section. Deformation of the lands by the swaging ball is essentially of a limited-load point-contact type to avoid a destructive collapse of the lands during the swaging process.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: January 25, 1977
    Assignee: Grumman Aerospace Corporation
    Inventor: Edward H. Leszak