| US 7,479,089 B2 | ||
| Differential gear apparatus | ||
| Kosuke Yamanaka, Kashiwara (Japan); Shiro Nakano, Minamikawachi-gun (Japan); Kenji Higashi, Yamatokoriyama (Japan); Atsushi Ishihara, Yamatokoriyama (Japan); and Daisuke Maeda, Kashiwara (Japan) | ||
| Assigned to JTEKT Corporation, Osaka (Japan) | ||
| Filed on Jan. 24, 2006, as Appl. No. 11/339,760. | ||
| Claims priority of application No. 2005-018174 (JP), filed on Jan. 26, 2005; and application No. 2005-064533 (JP), filed on Mar. 08, 2005. | ||
| Prior Publication US 2006/0166771 A1, Jul. 27, 2006 | ||
| Int. Cl. F16H 57/08 (2006.01) | ||
| U.S. Cl. 475—344 | 10 Claims |
| 1. A differential gear apparatus, comprising:
a first sun gear coupled to a freely rotatable first shaft to be rotated in conjunction with the first shaft;
a second sun gear coupled to a freely rotatable second shaft to be rotated in conjunction with the second shaft;
a first planetary gear meshed with the first sun gear;
a second planetary gear rotated with the first planetary gear and meshed with the second sun gear; and
a carrier supporting the first and second planetary gears, wherein
the sun gears and the planetary gears have profile shifted teeth of which addendum modifications are different at the positions
in a flank width direction.
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