Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1994-06-03
1996-12-10
DePumpo, Daniel G.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
428472, 428698, F16J 1500, B32B 900
Patent
active
055824145
ABSTRACT:
An under coating 2 and a hard film 3 are formed on the outer circumferential surface of a piston ring 1 by an ion plating process. The under coating 2 is composed of at least one of Cr, Cr.sub.2 N, and CrN. The hard film 3 is composed of a hard coating material containing 3 percent to 20 percent by weight of oxygen in a solid solution state in a crystal structure of CrN and having the Vickers hardness of 1600 to 2200.
REFERENCES:
patent: 3770286 (1973-11-01), Angilella et al.
patent: 4486285 (1984-12-01), Aubert et al.
patent: 4876150 (1989-10-01), Onuki et al.
patent: 5316321 (1994-05-01), Ishida et al.
patent: 5405154 (1995-04-01), Tsuchiya et al.
Fukutome Hiroto
Miyazaki Satomichi
Tamagaki Hiroshi
Tanaka Shoji
Yamashita Nobuyuki
DePumpo Daniel G.
Teikoku Piston Ring Co. Ltd.
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