Patent ID: 7377242

Claim:
A valve timing adjusting apparatus that adjusts valve timing of at least one of an intake valve and an exhaust valve of an internal combustion engine, which are opened and closed by a camshaft upon transmission of a torque from a crankshaft to the camshaft, the valve timing adjusting apparatus comprising: a first rotatable body that includes a first inner gear and is rotated synchronously with one of the crankshaft and the camshaft; a second rotatable body that includes a second inner gear, which has an axial extent that does not overlap with an axial extent of the first inner gear, wherein the second rotatable body is rotated synchronously with the other one of the crankshaft and the camshaft; and a planet gear that includes a first outer gear and a second outer gear, wherein: the first outer gear and the second outer gear are meshed with and are driven together with the first inner gear and the second inner gear, respectively, to have a sun-and-planet motion, so that the planet gear changes a relative rotational phase between the first rotatable body and the second rotatable body; and the first rotatable body supports the second rotatable body from a radially inner side of the second rotatable body at a location, which is radially outward of the first inner gear.