Patent ID: 6484678
Filing Date: 2002-11-26
Classification: F01L,Y10T

Abstract:
A valve timing regulation device comprising:a first rotating body having a plurality of shoes on an inner peripheral face, the first rotation body being rotated by an output of an internal combustion engine; a second rotating body having a plurality of vanes on an outer peripheral face of a boss, the second rotating body stored to rotate relative to the inner section of the first rotating body and connected directly to a cam shaft of the internal combustion engine opening and closing at least one of an air-intake or exhaust valve of the internal combustion engine; a retarding oil pressure chamber and an advancing oil pressure chamber formed between the first rotating body and the second rotating body, and between the shoes and vanes; a seal mounting groove provided on the tip of the shoes and the vanes; a seal member which is indented in cross section and is inserted into the seal mounting groove; a fixing step for fixing a plate spring, the fixing step provided on both end faces of the seal member; the plate spring formed in a waveform having a backwardly curved section on both ends of the central curved section, the end of the backwardly curved section resiliently engaging with the fixing step, a stem of each backwardly curved section abutting at two positions on the inner bottom face of the seal member, the plate spring biasing the scat member in a direction of abutment with respect to an outer peripheral face of the boss of the second rotating body or an inner peripheral face of the first rotating body; and spring deformation preventing projections projecting from the inner bottom central section of the seal member and creating a space with the central curved section of the plate spring.