Rotor-type oil pump - Unisia Jecs Corporation
A rotor-type oil pump as claimed in claim 4, wherein the width of the tooth base section of the internal gear of said outer rotor is equal to a width of a tooth section of the external gear of the inner rotor. 6. A rotor-type oil pump as claimed in claim 1, wherein each of said outer and inner rotors is formed of an iron-base sintered alloy.
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