Patents by Inventor Edward F. Graham

Edward F. Graham 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).

  • Liquid level indicator apparatus
    Patent number: 4409831
    Abstract: An apparatus for measuring the liquid level adjacent the bottom of a slurry vessel is provided with a liquid level indicator that works in conjunction with a flow conduit which passes through a container with an imperforate side surface that covers a first open-topped fluid retaining container to permit the liquid within the slurry vessel to enter the open-top first fluid retaining container and the flow conduit in response to the level of liquid within the slurry vessel.
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: October 18, 1983
    Assignee: Olin Corporation
    Inventor: Edward F. Graham
  • Life and weight saving aircraft seat structure
    Patent number: 4204657
    Abstract: Life and weight saving aircraft seat structure employs frame supported interconnected pneumatic seat and seatback cushions with automatic compensation for pressure and temperature changes primarily by provision of predetermined pneumatic overflow envelope elastic force variables; in preferred embodiment self-extinguishing inflating gas is provided, a vented sleeve or sheath limits amount of expansion of the overflow envelope and an overflow relief valve limits system pressure.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: May 27, 1980
    Inventor: Edward F. Graham
  • Combustion-product retardant barrier system for aiding passenger escape from aircraft fuselage structure
    Patent number: 4121790
    Abstract: A temporary barrier for retarding heat, fire and smoke within a fuselage while permitting unobstructed physical access and visual access to escape routes by passengers and crew, includes a light-weight inflatable curtain system with air jet curtain structure guarding otherwise unobstructed access therethrough; in embodiments the system includes partial and full curtains, curtains movable for maximum isolation of combustion areas, and special sealing provisions.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: October 24, 1978
    Inventor: Edward F. Graham