Autotensioner
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United States of America Patent
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-
Jul 27, 2004
Grant Date -
Jan 30, 2003
app pub date -
Jan 30, 2002
filing date -
Jul 27, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An autotensioner comprises a cup-shaped stationary member, an arm rotatably attached to an opening of the stationary member. An axial bore is formed in the bottom of the stationary member. A rocking wall extending to the bottom is provided at the arm. A first friction member is provided between the rocking wall and the inner wall of the opening. The first friction member is gripped between the rocking wall and the inner wall. A rocking shaft extending to the bottom is provided at the center of a lid portion of the arm. The rocking shaft is inserted in the axial bore. A second friction member is provided between the rocking shaft and the axial bore. The first friction member and the second friction member are formed of a synthetic resin mainly comprised of PPS, exhibit high limited PV factors, and exhibit low coefficients of friction.
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