Chemistry: electrical and wave energy – Processes and products – Coating – forming or etching by sputtering
Reexamination Certificate
2008-03-11
2008-03-11
Chen, Bret (Department: 1762)
Chemistry: electrical and wave energy
Processes and products
Coating, forming or etching by sputtering
C427S008000, C427S528000, C427S530000
Reexamination Certificate
active
10536656
ABSTRACT:
The invention relates to a method for coating piston rings (10) for internal combustion engines, wherein at least the bearing surface of the piston ring is provided with an anti-abrasion and anti-corrosion coating (12) by means of a PVD or electroplating process. According to said method, the anti-abrasion and anti-corrosion coating is prevented from flaking or cracking caused by strain occurring on the piston ring during the operation of the motor by means of the following steps: a) coating parameters are set; b) an uncoated piston ring (18) is pre-stressed in order to obtain a predetermined diameter (06) thereof or opening width (10); an ion coating process is carried out using coating parameters according to step a); the internal stress of the anti-abrasion or anti-corrosion coating (12) is measured in state (b); e) a new, uncoated piston ring (10) is subjected to tensile pre-stressing or compressive strain according to the measured internal tension of the coating; and f) the piston ring is coated (10) according to the coating parameters according to step a).
REFERENCES:
patent: 3917290 (1975-11-01), Geffroy
patent: 4535683 (1985-08-01), Dworak et al.
patent: 4619865 (1986-10-01), Keem et al.
patent: 5449547 (1995-09-01), Miyazaki et al.
patent: 5582414 (1996-12-01), Miyazaki et al.
patent: 5672386 (1997-09-01), Ooya
patent: 5743536 (1998-04-01), Komuro et al.
patent: 5851659 (1998-12-01), Komuro et al.
patent: 6631907 (2003-10-01), Onoda et al.
patent: 6886521 (2005-05-01), Hamada et al.
patent: 7160616 (2007-01-01), Massler et al.
patent: 2004/0144318 (2004-07-01), Beck et al.
patent: 30 40 572 (1982-05-01), None
patent: 41 12 422 D2 (1991-10-01), None
patent: 44 19713 (1994-12-01), None
patent: 44 40 051 (1996-03-01), None
patent: 195 48 931 (1996-07-01), None
patent: 19630149 (1997-01-01), None
patent: 101 04 611 (2002-08-01), None
patent: 0702 097 (1996-03-01), None
patent: 1 087 031 (2001-03-01), None
patent: 2243162 (1991-10-01), None
patent: 2303640 (1997-02-01), None
patent: 3 000954 (1991-01-01), None
patent: 10 068058 (1998-03-01), None
Chen Bret
Collard & Roe P.C.
MAHLE GmbH
LandOfFree
Method for coating piston rings for internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for coating piston rings for internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for coating piston rings for internal combustion engine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3951189