Patent ID: 11927188
Assignee: MAHLE INTERNATIONAL GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A pump apparatus for pumping at least one liquid, comprising:
a cavity, through which at least one flow path leads, and
a gerotor device arranged in the cavity, which during operation delivers the at least one liquid, the gerotor device including:
at least two gerotor stages that respectively comprise an inner rotor rotating during operation about an inner axis with teeth projecting radially outside, and an outer rotor rotating during operation about an outer axis radially offset relative to the inner axis with radially inner open tooth gaps, in which the teeth of the inner rotor engage;
a rotor body rotating during operation about a rotor axis comprises radially open tooth gaps of a first gerotor stage of the at least two gerotor stages and teeth projecting radially outside of a second gerotor stage of the at least two gerotor stages;
a housing that receives the at least two gerotor stages;
wherein the tooth gaps of the at least two gerotor stages are fluidically sealed at least one of against one another and relative to a surrounding area; and
wherein the rotor body on at least one axial front side comprises an axially open and circumferential groove, and the housing comprises an axially projecting and circumferential rib, which for sealing the tooth gaps engages in the axially open and circumferential groove.