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US 12,571,384 B2Granted
Pump unit, storage device equipped therewith, and method for operating the storage device
AssigneeScheugenpflug GmbH
InventorAndreas Hoibl
Life of this patent
Estimating the term…
Abstract
In order to make the two pump units which are generally present in an emptying device for a storage container and which feed in alternating fashion as compact as possible on the one hand and subject to as little wear as possible on the other hand, both pump units are preferably equipped with a feed pump in the form of a diaphragm pump, which is driven by a hydraulically operated working cylinder unit.
Claims23
Pump unit for conveying liquid or pasty material, wherein the pump unit comprises a feed pump which has:
- a pump element which is movable relative to a feed pump housing in a direction of movement and which is or comprises an elastic element;
- a feed pump drive in the form of a drive working cylinder which comprises a drive plunger movable in the direction of movement, which is operatively connected to the elastic element,
- wherein:
- the drive working cylinder can be operated hydraulically and at least one working chamber on a rear side of a drive piston facing away from the pump element has a hydraulic connection;
- a drive chamber of the feed pump has a hydraulic connection configured to be pressurized during operation with the same pressure as the hydraulic connection of the at least one working chamber, and
- a connecting line is provided between the at least one working chamber of the drive working cylinder facing away from the feed pump and the drive chamber of the feed pump.
3 more elements
Dependencies are inferred from the claim text.