Abstract: An improved hose coupling for railway vehicle brake pipe hoses, which coupling is characterized by a straight nipple portion and an angular extension of the lower end of the coupling lip for preventing inadvertent uncoupling due to excessive bouncing motion of the vehicle and, therefore, vertical oscillation of the hoses.

Abstract: In a proportioning type control valve device in which a piston valve assemblage is actuated to service position in accordance with a differential between brake pipe and control reservoir pressures on opposite sides of an actuating piston abutment forming a part of the piston valve assemblage, there is provided on the control reservoir side of the piston abutment a bellows device that is normally held under compression by the presence of control reservoir fluid pressure so as to be normally disengaged from the piston and engageable therewith only in the absence of control reservoir pressure to serve as the reference against which reductions in brake pipe pressure are measured to establish the actuating force on the piston abutment. When disengaged from the piston abutment under the influence of the control reservoir pressure, the bellows holds a control spring housed within the bellows under compression.

Abstract: When the deceleration of a vehicle wheel exceeds a certain chosen value, a wheel-slip-responsive means causes operation of a valve to close communication between a hydraulic master cylinder and a hydraulic brake-applying cylinder and connect this brake applying cylinder to a volume chamber to thereby release the braking force on the wheel until this wheel accelerates back to an angular velocity that corresponds to the linear velocity of the vehicle.

Abstract: This invention relates to a replaceable plastic wear member which is disposed within the center bowl of a railway vehicle truck bolster and interposed between the bottom of the center bowl and a vehicle body bolster center plate that extends from the bottom of the body into the center bowl in abutting relation with the upper side of the wear member, the purpose of which member is to prevent wear of the bottom of the center bowl by the relative movement between the car body and the truck bolster.