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US 6,712,513 B2Granted
Fluid bearing device
AssigneeNsk Ltd.
InventorsKatsuhiko Tanaka, Ikunori Sakatani, Yukio Higuchi, Takenobu Otsubo, Masayuki Ochiai
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Abstract
A fluid bearing device achieves superior in wear start-stop resistance and in manufacturing ability. The fluid bearing device includes a shaft having a flange portion, a sleeve opposing to the shaft across a fluid bearing clearance of a radial fluid bearing, a counterpart member opposing to at least one of plane of the flange portion across a fluid bearing clearance of a thrust bearing. The flange portion and the sleeve portion being formed of copper alloy of mutually difference composition.
Claims25
A fluid bearing device comprising:
- a shaft having a flange portion;
- a sleeve opposing the shaft across a radial fluid bearing clearance;
- and
- a counterpart plate opposing one plane of said flange portion across an axial fluid bearing clearance,
- wherein said flange portion and said sleeve are formed of copper alloys of mutually different compositions and the copper alloy forming the sleeve has a Vickers hardness Hv of 180 or higher.
2 more elements
Dependencies are inferred from the claim text.