Patent ID: 7017540
Filing Date: 2006-03-28
Classification: F01L

Abstract:
1. A valve timing adjusting device comprising: a first rotor that rotates synchronously with a crankshaft of an internal combustion engine; a second rotor that is relatively rotatable by a predetermined angle within the first rotor, and is integrally secured on the end face of an intake camshaft or an exhaust camshaft of the internal combustion engine; and a lock mechanism having a receiving hole that is formed passing through the first rotor radially to the device; a lock pin that is slidably provided within the receiving hole; an engaging hole that is formed within the second rotor, and engages with the lock pin; an urging member for urging the lock pin toward the second rotor; and a locking member for locking the urging member within the receiving hole; wherein the receiving hole of the lock mechanism is a stepped structure having a small part at the outermost located radially to the device.