Solid anti-friction devices – materials therefor – lubricant or se – Solid anti-friction device – article or material therefor – Graphite – coal – or elemental carbon
Reexamination Certificate
2011-06-28
2011-06-28
Caldarola, Glenn A (Department: 1771)
Solid anti-friction devices, materials therefor, lubricant or se
Solid anti-friction device, article or material therefor
Graphite, coal, or elemental carbon
C508S154000, C508S433000, C428S408000
Reexamination Certificate
active
07968502
ABSTRACT:
The present invention relates to a lubricant for lubricating relatively movable, facing contact surfaces at least one of which is coated with DLC, a method of lubricating DLC contact surfaces with this lubricant, and a system having DLC contact surfaces. The lubricant fulfills the following conditions (a) and (b):(a) the lubricant contains a lubricant base oil containing, as a main component, a base oil composed at least one of a hydrocracked mineral oil, a wax-isomerized mineral oil, and a poly-α-olefin base oil. The base oil has a kinematic viscosity of 2 to 20 mm2/s at 100° C., a total aromatic content of not higher than 5 mass %, and a sulfur content of 0.005 mass %; and(b) the lubricant has a sulfur content of not higher than 0.2 mass %.
REFERENCES:
patent: 5282990 (1994-02-01), Yoneto et al.
patent: 6333298 (2001-12-01), Waddoups et al.
patent: 6508416 (2003-01-01), Mastro et al.
patent: 6543394 (2003-04-01), Tinney
patent: 2002/0086803 (2002-07-01), Berlowitz et al.
patent: 2002/0142922 (2002-10-01), Yagishita et al.
patent: 2003/0162672 (2003-08-01), Shirahama et al.
patent: 2004/0092405 (2004-05-01), Konishi et al.
patent: 2004/0242434 (2004-12-01), Yagishita et al.
patent: 2005/0241216 (2005-11-01), Clark et al.
patent: 2005/0272616 (2005-12-01), Yagishita
patent: 1167497 (2002-01-01), None
patent: 1535985 (2005-06-01), None
patent: 2000-297373 (2000-10-01), None
patent: 2001-192864 (2001-07-01), None
patent: 2001-316686 (2001-11-01), None
patent: 2004-353456 (2004-12-01), None
patent: 2004347053 (2004-12-01), None
patent: WO-93/21289 (1993-10-01), None
patent: WO-03033629 (2003-04-01), None
M. Kano et al., The Effect of ZDDP and MODTC Additives on Friction Properties of DLC and Steel CAM Follower in Engine Oil, 2nd World Tribology Congress, Sept. 3-7, 2001, Vienna.
Japanese Society of Tribologists, Congress Proceeding, Tokyo 1999, 5, p. 11-12, Kano, et al.
PCT International Preliminary Report on Patentability for PCT/JP2004/011377 issued May 8, 2006.
Yukata Mabuchi et al: “Diamond—Like Carbon Coating for Reducing Valvertrain Friction” SAE Technical Paper Series, Society of Automotive Engineers, Warrendale, PA, US, Jan. 1, 2004, XP009105548 ISSN: 0148-7191.
Ishikawa Takao
Kano Makoto
Konishi Shozaburo
Ueno Takafumi
Caldarola Glenn A
Nippon Oil Corporation
Nissan Motor Co,. Ltd.
Vasisth Vishal
Voight Jason D.
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