Pneumatic control device for a pressurized air hoist

摘要

The device has a shiftable 3/3-way valve arrangement (2) for controlling different operating conditions of a compressed air lifting device (6), and a connection at a pneumatic source (5). A pressurized load connection (8) is provided to a lifting cylinder. A throttle device is provided for actuation proportional pressurization of the load connection. A hand operable actuation organ realizes different shifting conditions of the arrangement, where the organ mechanically cooperates with the throttle device having adjustable throttle pistons that are pressurized in two regulating directions.