US Patent 7198554 Method of making valve guide having textured external surface
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Patent Inventor Names
Howard M. Livingston0
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Patent abstract
A cylindrical valve guide having a roughened external surface texture from about 50 to about 100 microinches permits effective amounts of lubricating oil to become trapped or contained by such roughened external surface and thereby facilitates subsequent press fitting of the valve guide into an internal combustion engine. Centerless grinding constitutes a preferred method of achieving the surface texture of the invention.
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US Patent 07198554 Method of making valve guide having textured external surface US Patent 7198554 Method of making valve guide having textured external surface
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Patent Number
071985540
Patent Number
71985540
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Patent Jurisdiction
Patent Number
071985540
Date of Patent
April 3, 2007
0Patent Application Number
108198780
Date Filed
April 7, 2004
0Official Website
Patent Primary Examiner
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US Patent 07198554 Method of making valve guide having textured external surface
Infobox
Is a
Patent jurisdiction
Patent number
07198554
Date of patent
April 3, 2007
Patent application number
10819878
Date Filed
April 7, 2004
Patent primary examiner
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