Patents by Inventor John V. Carleton

John V. Carleton 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).

  • Railroad vehicle
    Patent number: 4388873
    Abstract: A closed railroad hopper car for solid commodities is loaded through hatches at its top. A pivoted lid or cover on each hatch is held shut by a single quick-acting cam lever. A catch prevents pressure in the car from throwing the hatch cover open when the tension from the cam lever is released. The hatch cover cannot be opened until after the cam lever is moved transversely out of contact with the catch.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: June 21, 1983
    Assignee: Union Tank Car
    Inventors: John V. Carleton, Nick Nenadic