Patent ID: 9541089
Date: 2017-01-10
CPC Classifications: F04B,F04C,F04D

Claim:
1. An electrically driven dual pump, comprising: a housing comprising suction ports and discharge ports at respective end sections of the housing, the housing having a cylindrical inner circumferential surface and comprising a plurality of coils disposed in a circumferential direction of the housing; a common shaft that extends between the respective end sections; a cylindrical outer rotor rotatably disposed with respect to the inner circumferential surface side of the housing and having a plurality of permanent magnets on an outer circumferential surface of the outer rotor to comprise a motor section in cooperation with the coils of the housing; a partitioning plate disposed to partition an inner circumferential side of the outer rotor into a first pump chamber and a second pump chamber; a first inner rotor and second inner rotor, each of the first and second inner rotors being rotatably disposed within the first and second pump chambers with a rotation center of each of the first and second inner rotors eccentric to the center of the outer rotor, comprising a space against the outer rotor which is in communication with a corresponding one of the suction ports and the corresponding one of the discharge ports, and a plurality of slots radially formed on an outer circumferential surface of each of the first and second inner rotors; and a plurality of linkage plates disposed to transmit a rotational force from the outer rotor to each of the first and second inner rotors, the respective linkage plates having an outer radial end section swingably supported on an inner circumferential section of the outer rotor and an inner radial end section slideably received in the respective slots of the first and second inner rotors, the linkage plates dividing the space formed between the outer rotor and each of the first and second inner rotors into a plurality of chambers, wherein the partitioning plate protrudes from the outer rotor.