EP 0992570 A3 20000830 - Hydraulic oil composition for shock absorbers
Title (en)
Hydraulic oil composition for shock absorbers
Title (de)
Hydraulisches Öl für Stossdämpfer
Title (fr)
Huile hydraulique pour amortisseurs
Publication
Application
Priority
JP 28795898 A 19981009
Abstract (en)
[origin: EP0992570A2] The present invention provides a hydraulic oil composition comprising a base oil composed of a mineral oil (A) and/or synthetic oil (B) incorporated with 20 wt% or less, based on the whole composition, of one or more types of additives (C) including viscosity index improver and/or pour point depressant, and having a kinematic viscosity of 1 to 20 mm<2>/s at 100 DEG C, a viscosity index of 140 or more and a Brookfield viscosity of 2000 mPa•s or less at -40 DEG C, wherein the mineral oil (A) is a deeply dewaxed mineral oil (a) having a kinematic viscosity of 2 to 3 mm<2>/s at 100 DEG C, pour point of -30 DEG C or less and cloud point of -27.5 DEG C or less, or a mixed mineral oil of the deeply dewaxed mineral oil (a) and a low-viscosity mineral oil (b) having a kinematic viscosity of 1.0 to 6.0 mm<2>/s at 40 DEG C, and the synthetic oil (B) is a poly- alpha -olefin (c) having a kinematic viscosity of 1.5 to 45 mm<2>/s at 100 DEG C, and/or an ester compound (d) having a kinematic viscosity of 1.5 to 20 mm<2>/s at 100 DEG C and pour point of -30 DEG C or less.
IPC 1-7
C10M 169/04; C10M 101/02; C10M 105/38; C10M 107/10; C10M 111/02; C10M 111/04
IPC 8 full level
C10M 101/02 (2006.01); C10M 105/38 (2006.01); C10M 107/10 (2006.01); C10M 111/02 (2006.01); C10M 111/04 (2006.01); C10M 169/04 (2006.01); C10N 30/02 (2006.01); C10N 30/06 (2006.01); C10N 30/08 (2006.01); C10N 40/08 (2006.01)
CPC (source: EP)
C10M 101/02 (2013.01); C10M 105/36 (2013.01); C10M 105/38 (2013.01); C10M 107/10 (2013.01); C10M 111/02 (2013.01); C10M 111/04 (2013.01); C10M 143/00 (2013.01); C10M 145/14 (2013.01); C10M 169/041 (2013.01); C10M 2203/10 (2013.01); C10M 2203/1006 (2013.01); C10M 2203/102 (2013.01); C10M 2203/1025 (2013.01); C10M 2203/1045 (2013.01); C10M 2203/1065 (2013.01); C10M 2203/1085 (2013.01); C10M 2205/00 (2013.01); C10M 2205/02 (2013.01); C10M 2205/028 (2013.01); C10M 2205/0285 (2013.01); C10M 2207/2825 (2013.01); C10M 2207/2835 (2013.01); C10M 2207/2855 (2013.01); C10M 2209/084 (2013.01); C10N 2040/06 (2013.01)
Citation (search report)
- [X] US 4857220 A 19890815 - HASHIMOTO KATSUMI [JP]
- [X] US 4776967 A 19881011 - ICHIHASHI TOSHIHIKO [JP], et al
- [X] US 5646099 A 19970708 - WATTS RAYMOND FREDERICK [US], et al
- [A] US 5641732 A 19970624 - BLOCH RICARDO ALTREDO [US], et al
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0992570 A2 20000412; EP 0992570 A3 20000830; CA 2284343 A1 20000409; JP 2000109876 A 20000418; SG 108213 A1 20050128
DOCDB simple family (application)
EP 99307976 A 19991008; CA 2284343 A 19991001; JP 28795898 A 19981009; SG 1999004835 A 19990924