US 6,786,709 B1Granted

Gear pump with a drive and a hydraulic tank

AssigneeHydac Fluidtechnik GmbH

InventorsHarald Klahm, Rudiger Jung

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Abstract

A device for pumping fluid has a hydraulic pump (10) and a drive (12). The hydraulic pump (12) is produced as an independent component with different types of drive devices (12) as additional components that can be coupled in the form of a modular system, and is configured as a coupling piece (14) for this purpose. Hydraulic tanks (16) having different volumes represent a third, different type of component. Each hydraulic tank (16) can be connected on one side to the coupling piece (14). The corresponding drive device (12) can be connected on the opposite or same side of the coupling piece (14). The coupling piece (14) is built as a single component and embodied in the form of a base plate. The hydraulic pump (10) is an external gear pump (20), whose toothed wheels (22) are received or integrated into the base plate. A compact, modularly constructed building block system is achieved which is functionally reliable and easy to maintain.

Claims16

Dependent claims

A device for pumping fluid, comprising:

a hydraulic tank;
a drive mechanism;
and
a hydraulic pump with an external gear pump mechanism coupled to said drive mechanism, said gear pump mechanism being housed in an integral coupling piece in a form of an independent base plate with a first and second sides connected to said hydraulic tank and said drive mechanism, said first and second sides having first and second flange elements, respectively, with substantially similar external dimensions, said flange elements having an external circumferential sides with radial recesses receiving seals overlapped by a free end on at least one of said hydraulic tank and said drive mechanism;
whereby, differently sized hydraulic tanks and different types of drive mechanisms can be interchangeably coupled to said coupling piece in a manner of a building block system with said hydraulic tank, said drive mechanism and said hydraulic pump being three separable and independent components of the system, and with said hydraulic tank and said drive mechanisms being on one of said first side and said first and second sides, respectively.

2 more elements

Dependencies are inferred from the claim text.