Lubricating system, bearing utilizing the system, universal joint utilizing the system, and process for production thereof
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United States of America Patent
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Dec 18, 2012
Grant Date -
Feb 4, 2010
app pub date -
Dec 11, 2007
filing date -
Dec 11, 2006
priority date (Note) -
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Abstract
A lubricating having a foam lubricant that minimizes exudation of the lubricating component caused by deformation of the foam lubricant, is excellent in initial lubrication, has a long life, has a low cost, and is excellent in the productivity thereof; a bearing utilizing the lubricating system; a universal joint utilizing the lubricating system; and a process for the production thereof. A lubricating system includes a foam lubricant (9) containing a lubricating component in a resin thereof which foams, hardens, and becomes porous and a lubricant (10) for initial lubrication which is present together with the foam lubricant (9) in a portion to be lubricated. The lubricant (10) for initial lubrication consists of grease having a worked penetration not less than 300 or having a degree of oil separation not less than 0.7 wt % when the grease is left 24 hours at 70° C.
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