Patent ID: 7716828
Filing Date: 2010-05-18
Classification: B29C,B29L,F02D,F16K,Y10T

Abstract:
1. A method of manufacturing a throttle body comprising a resin main body defining a bore through which intake air flows, and a valve body having a shaft part rotatably supported by the main body via a pair of bearings, and a valve part for opening and closing the bore of the main body; the method comprising molding the main body with the valve body inserted together with the pair of the bearings; wherein, with the valve body positioned in place, the bearings are biased in a direction opposite to the flow of the intake air; wherein a resin molding pressure for molding the main body is used as biasing force for biasing the bearings in the direction opposite to the flow of the intake air, and wherein a clearance is provided between each of the bearings and the shaft part, the clearance allowing each of the bearings to move relative to the shaft part in a direction substantially perpendicular to an axial direction of the shaft part before the main body is molded.