Patents by Inventor DeLacy F. Ferris

DeLacy F. Ferris 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).

  • Expulsion bladder
    Patent number: 4013195
    Abstract: A liquid expulsion device having a tank enclosing a flexible bladder containing liquid to be expelled and an insoluble gas. Prior to expulsion the combined liquid and gas volume remains constant so that during environmental changes the bladder is forced into intimate flush contact with the tank and is incapable of flexing and becoming ruptured. Liquid is expelled through a surface tension screen that blocks passage of the gas.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: March 22, 1977
    Assignee: Rockwell International Corporation
    Inventor: DeLacy F. Ferris