• All sections
• B - Performing operations; transporting
• B60T - Vehicle brake control systems or parts thereof; brake control systems or parts thereof, in general; arrangement of braking elements on vehicles in general; portable devices for preventing unwanted movement of vehicles; vehicle modifications to facilitate cooling of brakes
• B60T 15/22 - Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed-air or vacuum source or atmosphere controlled by two fluid pressures with one or more auxiliary valves, for braking, releasing, filling reservoirs

Patent holdings for IPC class B60T 15/22

Total number of patents in this class: 17

10-year publication summary

Principal owners for this class