Patent ID: 11885332
Assignee: J.WAGNER GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. A conveying device comprising:
an eccentric screw pump; and
a controller configured to:
receive a pressure of a construction material at an outlet of the eccentric screw pump when the eccentric screw pump is running to provide the construction material to a dispensing device;
based on the pressure exceeding an upper limit value, automatically switch off the eccentric screw pump;
detect a characteristic variable of the eccentric screw pump;
compare the characteristic variable with at least one of:
a first comparison variable that represents operation of the dispensing device in an open position, or
a second comparison variable that represents operation of the dispensing device in a closed position:

switch off the eccentric screw pump based on detecting operation of the dispensing device in the closed position;
based on the switch off of the eccentric screw pump, monitoring a pressure prevailing at the outlet of the eccentric screw pump and restarting the operation of the eccentric screw pump in response to detecting at least one of:
the pressure prevailing at the outlet of the eccentric screw pump falling by a first pressure difference within a first time interval due to opening of the dispensing device or the dispensing device being in the open position, or
the pressure prevailing at the outlet of the eccentric screw pump falling to a lower limit value or by a second pressure difference with the dispensing device in the closed position, the second pressure difference being greater than the first pressure difference.