Patent ID: 7258535

Claim:
A pump comprising: a first housing member including a cylindrical wall, a bottom wall provided at one end of the cylindrical wall, a fixing portion provided at an outer side of the cylindrical wall, the other end of the cylindrical wall being open, and an inlet port and an outlet port being formed in the cylindrical wall; a rotor installed within the first housing member; a separating member to be rotated with the rotor, an edge of the separating member being in contact with an inner face of the first housing member, wherein an inner cavity of the first housing member is separated into a plurality of divided spaces by the separating member and the rotor, and wherein the edge of the separating member slides along the inner face of the first housing member while the separating member is rotated with the rotor; and a second housing member including a sealing portion, a side portion and a connecting portion, wherein the sealing portion makes tight contact with the open end of the cylindrical wall of the first housing member, the side portion extends from the sealing portion to the fixing portion of the first housing member along an outer face of the cylindrical wall of the first housing member, the connecting portion is provided at a distal end of the side portion, and the connecting portion is connected to the first housing member, wherein a supporting groove for supporting the separating member extends within the rotor both in a radial direction of the rotor and in an axial direction of the rotor, and the supporting groove extends from the rotor into a rotary shaft connected with the rotor, and wherein the separating member protrudes from the rotor both in the radial direction of the rotor and in the axial direction of the rotor.