Abstract: A handheld device according to an exemplary embodiment of this disclosure, among other possible things, includes an emergency stop valve including an inlet, at least one outlet, an exhaust, a main passage, and a stem passage. Air flows from the inlet to the outlet and from the outlet to the exhaust during normal operation of the handheld device, and the inlet is blocked and the air is exhausted through the exhaust during emergency operation of the handheld device. The handheld device includes a valve stem assembly received in the main passage, and the valve stem assembly includes a button and a cavity having a pocket. The handheld device also includes a locking stem including an end portion, and the locking stem is received in the stem passage and the end portion of the locking stem is received in the cavity of the valve stem assembly.

Abstract: A handheld device according to an exemplary embodiment of this disclosure, among other possible things, includes an emergency stop valve including an inlet, at least one outlet, an exhaust, a main passage, and a stem passage. Air flows from the inlet to the outlet and from the outlet to the exhaust during normal operation of the handheld device, and the inlet is blocked and the air is exhausted through the exhaust during emergency operation of the handheld device. The handheld device includes a valve stem assembly received in the main passage, and the valve stem assembly includes a button and a cavity having a pocket. The handheld device also includes a locking stem including an end portion, and the locking stem is received in the stem passage and the end portion of the locking stem is received in the cavity of the valve stem assembly.

Abstract: A pneumatic control system for a freight car having a brake pipe, auxiliary and emergency reservoirs normally charged with pressurized fluid from the brake pipe, a fluid pressure activated brake cylinder device and an exhaust including an electronic controller, at least one pressure sensor, an electrically operated supply valve controlled by the electronic controller selectively communicating the brake cylinder with one of the reservoirs to perform a brake application, an exhaust valve selectively communicating the brake cylinder with the atmosphere thereby performing a brake release function, and an electronically operated exhaust latching valve controlled by the electronic controller to selectively signal the exhaust valve to connect the brake cylinder to the exhaust.

Abstract: A pneumatic control system for a freight car having a brake pipe, auxiliary and emergency reservoirs normally charged with pressurized fluid from the brake pipe, a fluid pressure activated brake cylinder device and an exhaust including an electronic controller, at least one pressure sensor, an electrically operated supply valve controlled by the electronic controller selectively communicating the brake cylinder with one of the reservoirs to perform a brake application, an exhaust valve selectively communicating the brake cylinder with the atmosphere thereby performing a brake release function, and an electronically operated exhaust latching valve controlled by the electronic controller to selectively signal the exhaust valve to connect the brake cylinder to the exhaust.