Patent ID: 7395791

Claim:
A valve timing controller disposed in a drive system which transmits torque of a drive shaft to a driven shaft for opening and closing of a valve to control opening and closing of the valve, the valve timing controller comprising: a first rotating element which rotates in association with the drive shaft; a second rotating element which rotates in association with the driven shaft; a phase changing mechanism part including arm members for coupling to the first rotating element and the second rotating element by a revolute pair to change a relative rotational phase between the first rotating element and the second rotating element caused by motion of the revolute pair of the arm members; a cam plate disposed at one of the first rotating element and the second rotating element so as to be rotated integrally therewith to be coupled to the arm members by the revolute pair; and a stopper disposed in the other of the first rotating element and the second rotating element to restrict a rotational angle of the cam plate in a predetermined range, wherein a changing angle of the relative rotational phase between the first rotating element and the second rotating element is defined by contacting the cam plate to the stopper, wherein: a concave part having a bottom is disposed at one of the stopper and the cam plate and formed in a contact face part where the stopper and the cam plate contact such that the other is inserted into the concave part; and a damper chamber is defined between the concave part and the other of the stopper and the cam plate.