Patent ID: 6662769
Filing Date: 2003-12-16
Classification: F01L

Abstract:
A valve timing control device comprising:a rotary member adapted to be rotatably arranged in a torque transmitting route between a crankshaft of an internal combustion engine and a camshaft of the internal combustion engine; a rotational transmitting member rotatable relative to the rotary member; a pressure chamber formed by the rotary member and the rotational transmitting member; a vane provided on the rotary member or the rotational transmitting member dividing the pressure chamber into an advancing chamber and a delaying chamber; a helical spring which urges the rotary member in the advancing direction to expand the advancing chamber, the helical spring having a coil portion, a first end portion engaging the rotary member and a second end portion engaging the rotational transmitting member; and at least one of the first and second end portions of the helical spring extending on an imagined radial plane arranged in a radial direction of the coil portion.