Friction plate for wet multi-plate clutch

192 clutches and power-stop control – Elements – Engaging surfaces

Reexamination Certificate

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Details

C192S113360

Reexamination Certificate

active

07984801

ABSTRACT:
In a friction plate40, segment pieces42of a friction material are bonded onto a core plate40at intervals in a circumferential direction.43denotes a spline tooth. On each segment piece, there are formed a first oil groove which is made to open to an inside-diameter side of the segment piece and has its end portion part-way along the segment piece (hereinafter, referred to as a first oil groove) and a second oil groove which is made to open to an outside-diameter side of the segment piece and has its end portion part-way along the segment piece (hereinafter, referred to as a second oil groove). Segment pieces in which a first oil groove51and second oil grooves61are pressure molded and segment pieces in which a first oil grooves52and second oil grooves62are stamped are arranged alternately.

REFERENCES:
patent: 2690248 (1954-09-01), McDowall
patent: 4726455 (1988-02-01), East
patent: 5776288 (1998-07-01), Stefanutti et al.
patent: 2005/0072649 (2005-04-01), Guthrie et al.
patent: 2007/0102258 (2007-05-01), Miyazaki et al.
patent: 2008/0156611 (2008-07-01), Hirayanagi
patent: 62-98832 (1987-06-01), None
patent: 62-112324 (1987-07-01), None
patent: 04-211729 (1992-08-01), None
patent: 11-141570 (1999-05-01), None
patent: 2002-181073 (2002-06-01), None
patent: 2005-036980 (2005-02-01), None
patent: 2005-76759 (2005-03-01), None
Japanese Office Action dated Mar. 17, 2009.

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