Patents by Inventor Leroy P. Kennedy

Leroy P. Kennedy 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 car hand brake signal device
    Patent number: 4296707
    Abstract: A railroad car hand brake signal device alerts a train crew when a rail car hand brake is set and air is supplied to the brake pipe during operation of the train. If a rail car hand brake remains applied when air is supplied to the train's brake pipe, a whistle is sounded to enable the crew to identify the car having a set hand brake and a leakage path is provided to cause the air pressure in the brake pipe to fall to alert the train crew in the locomotive that a hand brake is set.
    Type: Grant
    Filed: February 13, 1980
    Date of Patent: October 27, 1981
    Assignee: Abex Corporation
    Inventor: Leroy P. Kennedy
  • 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