US 2011/0236241 A1Published application

Hybrid Pump for Delivering a Liquid Pump Medium

AssigneeHorn GmbH & Co. KG

InventorRalf Diekmann

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Abstract

The invention relates to a hybrid pump for delivering a liquid pump medium, comprising a rotor consisting of substantially non-elastic plastic, which is situated in the pump chamber and can rotate about a rotor axis. Said rotor has a base plate associated with the lower lateral surface of the pump chamber and several rotor parts that are spaced substantially at a uniform distance around the periphery, extend towards the opposite lateral surface of the pump chamber and are permanently connected to the base plate. A preferably curved rotor blade is pivotally hinged on the outer end of each rotor part, forming pump chambers of the rotor between neighboring rotor parts and rotor blades, said chambers being open towards the upper lateral surface of the pump chamber and the bases of said chambers being formed by the base plate of the rotor. The pump is characterized in that the bases of the pump chambers follow a concave arc, rising from the outer edge of the base plate inward towards the rotor axis.

Claims6

Dependent claims

Hybrid pump for delivering a liquid pump medium, with a housing, having a pump space as well as an inlet opening into pump space and an outlet leading out of pump space, and with a rotor, rotatable about a rotor axis and consisting of essentially inelastic, preferably chemically-resistant plastic, in particular PEEK, arranged in pump space, wherein pump space has an essentially circular or rounded running surface and a respective side face on both sides of rotor, wherein rotor is eccentrically arranged in pump space relative to running surface, wherein rotor has a baseplate associated with the lower side face of pump space and several rotor parts arranged at essentially uniform intervals in the circumferential direction extending towards the opposite side face of pump space and fixedly connected to baseplate, wherein a preferably curved rotor blade is pivotably hinged to the outer end of each rotor part and wherein, between adjacent rotor parts and rotor blades, pump chambers of rotor are formed that are opened to the upper side face of pump space and the bottoms of which are formed by baseplate of rotor, wherein the bottoms of pump chambers rise in a concave curved shape from the outer edge of baseplate inwardly towards rotor axis.

Dependencies are inferred from the claim text.