Method of lubrication of a controlled-slip differential
US4180466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1974 |
| Grant date | Dec 25, 1979 |
| Priority date | — |
| Expiry date | Jul 17, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved method of lubrication of a controlled-slip differential comprises using a lubricant comprising major amounts of a hydrocarbon base stock and friction improving amounts of synthetic sulfurized oil consisting essentially of a cosulfurized blend of a triglyceride and a C.sub.2 -C.sub.128 monoolefin. The hydrocarbon base stock can have a kinematic viscosity at 210.degree. F. in the range of 1.5 to 200.0 cs. and contain paraffinic (by VGC) petroleum oil or a blend of at least one C.sub.13 -C.sub.29 naphthene and from 0.1 to 20 parts by weight, based on said naphthene of at least one member from at least one of the following groups (a), (b), (c) and (d): PA1 (a) a synthetic liquid C.sub.3 -C.sub.8 olefin homopolymer, copolymer or terpolymer; PA1 (b) a member from group (a) above which is at least partially hydrogenated; PA1 (c) a severely hydrorefined naphthenic mineral oil lube containing less than 1 percent of gel aromatic hydrocarbons; and PA1 (d) a severely hydrorefined paraffinic mineral oil lube containing less than 1 percent of gel aromatic hydrocarbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.