Patent ID: 6413179
Filing Date: 2002-07-02
Classification: F01L,F16H

Abstract:
An autotensioner comprising a cylinder, a pushrod slidably received in said cylinder, and a spring for biasing said pushrod so as to protrude out of said cylinder, said pushrod being movable in an axial direction to absorb any change in tension in a belt, characterized in that a detector for detecting a limit position of a forward stroke of said pushrod is provided;wherein said detector comprises an electrode mounted to said cylinder through an insulating member, and a contactor provided on said pushrod so as to come into contact with said electrode when said pushrod has moved to said limit position; and wherein said electrode is a metal ring for reinforcing an oil seal closing an opening of said cylinder, and wherein said contactor is a guide flange fixedly mounted on said pushrod and guided along the inner periphery of said cylinder.