Patent ID: 8091524

Claim:
A valve timing control device comprising: a driving side rotational member synchronously rotatable with a crankshaft of an internal combustion engine; a driven side rotational member arranged coaxially with the driving side rotational member and synchronously rotatable with a camshaft that controls opening and closing operations of a valve of the internal combustion engine; a fluid pressure chamber defined by the driving side rotational member and the driven side rotational member; a parting portion provided at at least one of the driving side rotational member and the driven side rotational member in order to divide the fluid pressure chamber into an advanced angle chamber and a retarded angle chamber; a restriction member accommodated within an accommodation portion, which is formed at one of the driving side rotational member and the driven side rotational member and being insertable into and retractable from the other one of the driving side rotational member and the driven side rotational member; a restriction recessed portion formed in an elongated groove shape at the other one of the driving side rotational member and the driven side rotational member so that the restriction member is insertable thereinto and restricting a displacement of a relative rotational phase of the driven side rotational member relative to the driving side rotational member in a range between one of a most advanced angle phase and a most retarded angle phase on the one hand and a predetermined phase between the most advanced angle phase and the most retarded angle phase on the other when the restriction member is inserted into the restriction recessed portion; and a restriction cancellation passage for connecting one of the advanced angle chamber and the retarded angle chamber and the accommodation portion in response to a rotatable movement of the driven side rotational member relative to the driving side rotational member so that the accommodation portion becomes in communication with the one of the advanced angle chamber and the retarded angle chamber and for canceling a restriction generated between the restriction member and the restriction recessed portion, wherein a communication between the accommodation portion and the one of the advanced angle chamber and the retarded angle chamber via the cancellation passage is interrupted at least when the restriction member contacts one of first and second end portions of the restriction recessed portion in a rotational direction of the other one of the driving side rotational member and the driven side rotational member, and the restriction member is restricted so as not to move over the other one of the first and second end portions of the restriction recessed portion, positioned so as to correspond to the predetermined phase, to be disengaged from the restriction recessed portion.