Operating device for a tube lifter and tube lifter
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United States of America Patent
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May 12, 2020
Grant Date -
Sep 12, 2019
app pub date -
Feb 25, 2019
filing date -
Mar 12, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
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 a valve for controlling the fluid communications.
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