Jtekt Corporation

Toyoda Koki Kabushiki Kaisha

Atsushi Eto

Toshiyuki Saito

Koji Nishi

Takumi Mio

Hiroyuki Yao

Hajime Fukami

Kentaro Yamauchi

A metal part in which a base material of silicon-aluminum alloy having 1 to 25% by mass of silicon as an anode is immersed in an electrolyte together with a cathode, and at least a portion of a surface of the base material is anodized and coated with an anodic oxide film. A current density provided to both the anode and the cathode is increased from an initial current density of 0 A/dmat a rate between 0.15 and 0.35 A/dmper minute, wherein once the current density reaches a prescribed current density of between 0.8 A/dmand 1.2 A/dm, the current density provided to the anode and the cathode is maintained at the prescribed current density.

Metal part and method of manufacturing metal part

In an oil pump apparatus, a drain outlet is positioned outwardly from an inner peripheral surface of a suction passage or from an extended line thereof at a sectional view which takes along an orthogonal direction relative to a central axis of the suction passage and which shows the drain outlet, and/or the drain outlet is positioned at a side of a shaft aperture to be away from an imaginary line connecting a central axis of a discharged passage and a central axis of the suction passage at a sectional view which takes in parallel with the central axis of suction passage and which shows the drain outlet, such that the opening center of the drain outlet is not overlapped on the imaginary line.

Oil pump apparatus having oil drain

Growing community of inventors

Okazaki, Japan

Atsushi Eto