Patents Assigned to Duluth & Iron Range Co., Inc.
  • Air brake pilot adaptor
    Patent number: 5390988
    Abstract: A pilot mechanism for improving operation of various functions of the pneumatic brake of a train. The mechanism includes solenoid valves, controllable by either a radio/battery mode of operation or a train wire system mode of operation. The solenoid valves can be interposed in various passages in fluid communication with passages of a conventional ABD control valve, as modified to enable operation of the invention, to permit substantially immediate venting of air in those passages to atmosphere.
    Type: Grant
    Filed: February 2, 1993
    Date of Patent: February 21, 1995
    Assignee: Duluth & Iron Range Co., Inc.
    Inventor: Donald B. Shank