The invention relates to an operating device for a tube lifter having a lifting tube that has a tube interior and can be shortened by applying a vacuum to the tube interior, and having a suction grip device arranged on one end of the tube lifter, which suction grip device can be supplied with a vacuum through the tube interior, the operating device having a suction port for fluid communication with the suction grip device, a lifting tube port for fluid communication with the tube interior of the lifting tube, and valve means for controlling the fluid communications, the valve means including a control valve which is adjustable between a closed position and an open position, in the open position a flow path from the surroundings to the lifting tube port being open, and in the closed position said flow path being substantially closed, and a control mechanism comprising a manually actuable operating element being provided for adjusting the control valve.
Operating Device For A Tube Lifter And Tube Lifter
2019-09-12
Patent
Electronic Resource
English
IPC: | B66C Krane , CRANES |