Train-pipe-valve Structure Patents (Class 246/190)
  • Patent number: 4404987
    Abstract: A trip cock device including a pilot valve actuable by a trip lever, when the train on which the trip cock is mounted passes over a trip arm secured to the track, for causing a release valve in the trip cock to be opened and opening brake pipe pressure to atmosphere, at an emergency rate, for effecting an emergency brake application. Axial displacement of the pilot valve, along with a stem thereon, causes a groove in the stem to be engaged by a detent member for securing the trip cock in open disposition until the detent is released manually.
    Type: Grant
    Filed: September 24, 1981
    Date of Patent: September 20, 1983
    Assignee: American Standard Inc.
    Inventors: Robert J. Bridigum, William S. Johnston