Clutch including spun rotor having hardened depressions
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United States of America Patent
Stats
-
Jan 4, 2005
Grant Date -
Sep 4, 2003
app pub date -
Feb 27, 2003
filing date -
Feb 28, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In an electromagnetic clutch having drive and driven side clutch plates in which the drive side clutch plate is provided with a plurality of elongated holes circumferentially arranged at given intervals, a depression is formed by compressing and plastically press deforming each bridge portion positioned circumferentially between adjacent two of the elongated holes on an axial end surface of the drive side clutch plate facing the driven side clutch plate. Though tensile stress caused by belt tension is likely concentrated on the bridge portion, the depression, which causes higher hardness of the bridge portion, effectively serves to restrain occurrence of the fatigue failure.
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