Abstract: A swivel gladhand for vehicle air brake systems which includes a continuously torsioned body portion which when not in use is automatically urged to a position wherein the outlet opening therein is seated against a stop member which seals the outlet opening therein and which also includes a selectively movable locking arm which is operable to cam the body portion against the stop member to thereby positively secure the body in sealed engagement with the stop member to prevent the loss of air pressure therethrough when the gladhand is not in use.

Abstract: An air brake control system for use in truck trailers having at each axle compressed-air brakes including spring brakes and service brakes, and each trailer being coupled to receive compressed air through an emergency (supply) gladhand and to receive service brake signals through a service (control) gladhand, the invention comprising an integrated brake valve system for each axle of each trailer, including a common valve housing; a spring brake valve cluster having a non-return check valve connected to receive and pass air pressure from the emergency gladhand and to deliver it directly to the spring brakes and an air pressure responsive shuttle operative to open the check valve whenever the emergency line pressure falls below a predetermined spring brake isolation pressure above which the spring brake holding pressure is not affected by fluctuations of the emergency gladhand pressure; and including an air tank supply valve cluster connected between the emergency gladhand and the tank and operative to sense pr