Patent ID: 7240399

Claim:
A door checker for an automobile, comprising: a case secured to one of a body of an automobile and a door pivotally supported on said body for turning movement; a check plate which movably extends through said case to be connected to the other of said body and said door and which is provided in its opposite sides with ball guide grooves extending in a lengthwise direction; a pair of ball holders accommodated in said case and capable of advancing and retracting toward and away from the opposite sides of said check plate, wherein a projection is integrally formed on a side of each ball holder and resiliently abuts against an inner side of the case, the projection being disposed at a center of and extending away from the side of the ball holder in a direction parallel to the ball guide grooves; a pair of balls which are retained in hemispherical ball housings formed in said ball holders and which are rollably engaged in said ball guide grooves; and check springs for biasing said ball holders toward said check plate, wherein a recess is formed in a hemispherical inner surface of each ball housing and retains a grease within the recess, the recess also accommodates dust therein.