Patents by Inventor James L. Kalkstein

James L. Kalkstein 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 air brake systems
    Patent number: 4153305
    Abstract: Brake system for a railroad vehicle in which the angle cocks and cut-off valve are eliminated and supplanted by a single valve assembly in a valve housing positioned at the junction of the brake pipe and branch pipe; the valve element is in the form of a selectively positionable seal support member carried on a shaft which may be operated from a safe position at either side of the vehicle; a positive lock holds the position of the valve element and is designed to discourage vandalism.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: May 8, 1979
    Assignee: Abex Corporation
    Inventors: Leroy P. Kennedy, James L. Kalkstein