Lockup device, and fluid-type torque transmission device equipped with same
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United States of America Patent
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Jun 26, 2012
Grant Date -
Apr 16, 2009
app pub date -
Sep 18, 2008
filing date -
Oct 10, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lockup device 5 of a torque converter 1 has a piston 51, a first plate 61, a second plate 62, a intermediate plate 63, a plurality of first springs 64, and a plurality of second springs 65. The intermediate plate 63 is provided so as to be able to rotate with respect to the piston 51 within a specific angular range. The second springs 65 are disposed more to the outside in the radial direction than the first springs 64 so as to act in series with the first springs 64 via the intermediate plate 63, and are supported by the intermediate plate 63 so as to be elastically deformable in the rotation direction. The driven plate 68 has prongs 68a that can come into contact with the ends of the second springs 65, and is fixed to the outer peripheral part of the turbine 4.
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