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1. (WO1997019278) MECHANICAL PART
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/019278 International Application No.: PCT/JP1996/003390
Publication Date: 29.05.1997 International Filing Date: 20.11.1996
IPC:
F01L 1/16 (2006.01) ,F01L 1/18 (2006.01) ,F16C 13/00 (2006.01) ,F16C 33/30 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
L
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
1
Valve-gear or valve arrangements, e.g. lift-valve gear
12
Transmitting-gear between valve drive and valve
14
Tappets; Push-rods
16
Silencing impact; Reducing wear
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01
MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
L
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
1
Valve-gear or valve arrangements, e.g. lift-valve gear
12
Transmitting-gear between valve drive and valve
18
Rocking arms or levers
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
13
Rolls, drums, discs, or the like; Bearings or mountings therefor
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
C
SHAFTS; FLEXIBLE SHAFTS; MECHANICAL MEANS FOR TRANSMITTING MOVEMENT IN A FLEXIBLE SHEATHING; ELEMENTS OF CRANKSHAFT MECHANISMS; PIVOTS; PIVOTAL CONNECTIONS; ROTARY ENGINEERING ELEMENTS OTHER THAN GEARING, COUPLING, CLUTCH OR BRAKE ELEMENTS; BEARINGS
33
Parts of bearings; Special methods for making bearings or parts thereof
30
Parts of ball or roller bearings
Applicants:
KOYO SEIKO CO., LTD. [JP/JP]; 5-8, Minamisemba 3-chome Chuo-ku Osaka-shi Osaka 542, JP (AllExceptUS)
SADA, Takashi [JP/JP]; JP (UsOnly)
Inventors:
SADA, Takashi; JP
Agent:
KAMEI, Hirokatsu; AI Association of Patent and Trademark Attorneys Kinyukoko-Sumisei Building, 12F 5-20, Minamihommachi 4-chome Chuo-ku, Osaka-shi Osaka 541, JP
Priority Data:
7/30276321.11.1995JP
7/30276521.11.1995JP
Title (EN) MECHANICAL PART
(FR) PIECE MECANIQUE
Abstract:
(EN) A mechanical part having a rolling contact surface (11a) with many isolated minute recesses. A maximum height Ry of a roughness curve R obtained by cutting this contact surface (11a) with a plane perpendicular thereto is 1-3 $g(m)m, and a peak height Rp with respect to the center line of the roughness curve R and a valley depth Rv with respect thereto have the relation of Rp/Rv$m(F)0.3. This indicates that the contact surface (11a) has very low peaks of a relatively high distribution and very deep valleys of a relatively low distribution. Owing to the very low peaks of a relatively high distribution, a sufficiently wide contact area is secured. Owing to the valleys of a low distribution and a large depth, oil reservoirs of a sufficient capacity are formed.
(FR) L'invention concerne une pièce mécanique ayant une surface à contact roulant (11a) dotée d'un grand nombre de petites cavités isolées. Dans une courbe de rugosité R, on obtient une hauteur maximum Ry de 1-3 $g(m)m, en coupant la surface de contact (11a) selon un plan perpendiculaire, étant entendu que la hauteur maximum Rp par rapport à l'axe médian de la courbe de rugosité R et que la profondeur des creux Rv par rapport à cet axe entrent dans la relation Rp/Rv$m(F)0,3. Cela indique que la surface de contact (11a) présente des crêtes très faibles ayant une distribution relativement élevée et des creux très profonds ayant une distribution relativement faible. La présence de crêtes très faibles à distribution relativement élevée garantit une surface de contact suffisamment large. Grâce aux creux très profonds de faible distribution, on peut réaliser des réservoirs d'huile ayant une capacité suffisante.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0811789US5997988JP3827245