192 clutches and power-stop control – Field responsive frictional media type
Reexamination Certificate
2006-01-27
2008-09-09
Ho, Ha D. (Department: 3681)
192 clutches and power-stop control
Field responsive frictional media type
C192S052400
Reexamination Certificate
active
07422093
ABSTRACT:
A magneto-rheological coupling (MRC) having an input assembly and an output member. The output member includes a generally cylindrical drum portion and a hub portion extending radially inwardly therefrom. The generally cylindrical drum portion has a low magnetically permeable region having a plurality of passages defined therein. Additionally, a plurality of apertures are defined by the hub portion. The plurality of passages and apertures enhance the flow of magneto-rheological fluid (MRF) within the MRC. The drum portion has a surface treatment of tungsten-carbide to enhance wear resistance. Additionally, the drum portion has an average roughness, or Ra value, of between 10 and 250 microns.
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Murty Balarama V.
Namuduri Chandra S.
Shoemaker Kenneth J.
GM Global Technology Operations Inc.
Ho Ha D.
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