Patent ID: 7140340
Filing Date: 2006-11-28
Classification: F01L

Abstract:
1. A decompression device for an engine comprising: a flyweight to be freely extended by a centrifugal force caused by the rotation of a camshaft; a decompression cam to forcibly open at least one of an exhaust valve and an intake valve of the engine in association with movement of a shaft part of the flyweight; and a return spring to urge the flyweight in the angle-closing direction by a predetermined urging force, wherein the flyweight has a slide unit to allow the position of transmission of a return spring urging force to slide toward the shaft part as the flyweight is moved by a centrifugal force; and the return spring having a free end portion that slidably contacts the slide unit is pivotably supported at a position different from that of the shaft part of the flyweight.